XE88LC02 Sensing Machine Data Acquisition with ZoomingADC driver
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
XE88LC02 Sensing Machine
Data Acquisition with ZoomingADC driver
XE88LC02 data acquisition ultra lowpower low-voltage microcontroller unit (MCU) with extremely high efficiency, allowing MIPS 300uA bits multiplying clock cycle XE88LC02 includes high resolution acquisition path with 16+10 bits ZoomingADC driver segments. lines used additional IOs. XE88LC02 available with chip Multiple-Time-Programmable (MTP) program memory.
product Features
Low-power, high resolution ZoomingADC
1000 gain with offset cancellation bits input multiplexer power comparators
Low-voltage low-power controller operation
MIPS with operation MIPS over voltage range MIPS operation
Applications
Portable, battery operated instruments system supervisor Remote control HVAC control Metering Sports watches, wrist instruments
kByte kInstruction) 1032 Byte data memory crystal oscillators reset, interrupt, event sources segments driver used extra years Flash retention 55°C
Ordering Information
Product XE88LC02MI000 XE88LC02MI035 Temperature range -40°C -40°C Memory type Package LQFP100
Solu tion eles
XEMICS e-mail: info@xemics.com web: www.xemics.com
Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
TABLE CONTENTS
Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter XE88LC02 Overview XE88LC02 Performance XE88LC02 XE88LC02 Memory power modes Reset generator Clock generation Interrupt handler Event handler power Port Port Port Universal Asynchronous Receiver/Transmitter (UART) Universal Synchronous Receiver/Transmitter (USRT) Serial Peripheral Interface (SPI) Acquisition chain Voltage multiplier driver Counters/PWM Voltage Level Detector Power Comparators XE88LC02 Dimensions
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
General overview
1.2.1 1.2.2
SCHEMATIC LQFP-100 LQFP-80 ASSIGNMENT
LC02 november 2002
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
schematic
top-level block schematic circuit shown Figure 1-1. heart circuit consists Coolrisc816 core. This core includes multiplier internal registers. controller generates control signals access data registers other than internal registers. reset block generates adequate reset signals rest circuit function setup contained control registers. Possible reset sources power-on-reset (POR), external NRESET, watchdog (WD), error detected controller programmable pattern Port Different power modes implemented. clock generation power management block sets clock signals generates internal supplies different blocks. clock generated from oscillator (this start-up condition), crystal oscillator (XTAL) external clock source (given pin). test controller generates set-up signals different test modes. normal operation, used power data registers. power consumption important application, variables that need accessed frequently should stored these registers rather than RAM. handler routes interrupt signals different peripherals inputs core. allows masking interrupt sources flags which interrupt source active. Events generally used restart processor after HALT period without jumping specified address, i.e. program execution resumes with instruction following HALT instruction. handler routes event signals different peripherals inputs core. allows masking interrupt sources flags which interrupt source active. Port parallel port with analog capabilities. URST, UART, CMPD block also make this port. instruction memory 22-bit wide flash memory depending circuit version. case version, used. Flash versions have both instruction memory. data memory this product 1024 byte SRAM. Acquisition Chain high-resolution acquisition path with 16+10 bits ZoomingADC. VMULT (voltage multiplier) powers part Acquisition Chain. serial interface with master slave configuration capability. When unused, pads used 4-bit wide general-purpose port. port parallel input port. also generate interrupts, events reset. used input external clocks timer/counter/PWM block. Port Port general-purpose parallel ports. driver support direct drive display segments), multiplex 1/2, 1/3, displays segments). driver contains chip low-power voltage generation device VGEN. lines used additional pins. USRT (universal synchronous receiver/transmitter) contains some simple hardware functions order simplify software implementation synchronous serial link.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
INSTRUCTION MEMORY
DATA MEMORY
COOLRISC816
VBAT
MULTIPLIER REGISTERS
address control datain
PORT PA(7:0)
dataout
PORT PD1(7:0)
NRESET
RESET BLOCK
reset control
PORT PD2(7:0)
XOUT VREG
XTAL VREG
CLOCK GENERATION/ POWER MANAGEMENT
clocks Driver VGEN test control LCD_IO(31:0) LCD_COM(1:0) VGEN_Vx(4:0) USRT
PB(5:4)
TEST CONTROLLER
TEST
DATA REGISTERS HANDLING
HANDLING PORT PB(7:0)
UART
VMULT AC_R(3:0) AC_A(7:0)
ACQUISITION CHAIN VMULT (ZoomingADC)
CMPD
SPI(3:0)
Figure 1-1. Block schematic XE88LC02 circuit.
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PB(7:4)
PB(1:0) PA(3:0)
COUNTERS TIMERS
PB(7:6)
Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
UART (universal asynchronous receiver/transmitter) contains full hardware implementation asynchronous serial link. counters/timers/PWM take clocks from internal external sources Port generate interrupts events. output Port (voltage level detector) detects battery life with respect programmable threshold. CMPD contains 4-channel comparator. intended monitor analog digital signals with very power consumption.
LC02 delivered different packages. maps different packages given below. 1.2.1 LQFP-100
PD1(7)
PD1(6)
PD1(5)
PD1(4)
PD1(3)
PD1(2)
SPI(3)
SPI(2)
SPI(1)
SPI(0)
PA(7)
PA(6)
PA(5)
PA(4)
PA(3)
LCD_VR2 LCD_IO(0) LCD_IO(1) LCD_IO(2) LCD_IO(3) LCD_VR1 LCD_IO(4) LCD_IO(5) LCD_IO(6) LCD_IO(7) LCD_IO(8) LCD_IO(9) LCD_IO(10) LCD_IO(11) LCD_IO(12) LCD_IO(13) LCD_IO(14) LCD_IO(15) LCD_IO(16) LCD_IO(17) LCD_IO(18) LCD_IO(19) LCD_IO(20) LCD_IO(21) LCD_IO(22)
PA(2)
PB(7)
PB(6)
PB(5)
PB(4)
PB(3)
PB(2)
PB(1)
PB(0)
VMULT VREG VBAT XOUT AC_R(2) AC_R(3) AC_R(0)
AC_R(1) AC_A(7) AC_A(6) AC_A(5) AC_A(4) AC_A(3) AC_A(2) AC_A(1) AC_A(0) TEST
NRESET PD2(7) PD2(6) PD2(5) PD2(4) PD2(3)
VGEN_VA
VGEN_VB
VGEN_V1
VGEN_V2
LCD_COM(1)
LCD_COM(0)
LCD_IO(23)
LCD_IO(24)
LCD_IO(25)
LCD_IO(26)
LCD_IO(27)
LCD_IO(28)
LCD_IO(29)
LCD_IO(30)
LCD_IO(31)
VGEN_V3
VBAT
PA(0)
PD1(0)
PD1(1)
PA(1)
PD2(0)
PD2(1)
Figure 1-2. LQFP-100
PD2(2)
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Package
name PD2(3) PD2(4) PD2(5) PD2(6) PD2(7) NRESET TEST AC_A(0) AC_A(1) AC_A(2) AC_A(3) AC_A(4) AC_A(5) AC_A(6) AC_A(7) AC_R(1) AC_R(0) AC_R(3) AC_R(2) XOUT VBAT VREG VMULT PA(2) PD1(2) PA(3) PD1(3) PA(4) PD1(4) PA(5) PD1(5) PA(6) PD1(6) PA(7) PD1(7) PB(0) PB(1) PB(2) PB(3) PB(4) PB(5) PB(6) PB(7) SPI(0) SPI(1) SPI(2) SPI(3)
Package
name LCD_VR2 LCD_IO(0) LCD_IO(1) LCD_IO(2) LCD_IO(3) LCD_VR1 LCD_IO(4) LCD_IO(5) LCD_IO(6) LCD_IO(7) LCD_IO(8) LCD_IO(9) LCD_IO(10) LCD_IO(11) LCD_IO(12) LCD_IO(13) LCD_IO(14) LCD_IO(15) LCD_IO(16) LCD_IO(17) LCD_IO(18) LCD_IO(19) LCD_IO(20) LCD_IO(21) LCD_IO(22) LCD_IO(23) LCD_IO(24) LCD_IO(25) LCD_IO(26) LCD_IO(27) LCD_IO(28) LCD_IO(29) LCD_IO(30) LCD_IO(31) LCD_COM(1) LCD_COM(0) VGEN_VA VGEN_V1 VGEN_V2 VGEN_V3 VGEN_VB VBAT PD1(0) PA(0) PD1(1) PA(1) PD2(0) PD2(1) PD2(2)
Table 1-1. Bonding plan LQFP-100 package (LQFP 100L 14x14mm thick
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
1.2.2 LQFP-80
Package
name NRESET TEST AC_A(0) AC_A(1) AC_A(2) AC_A(3) AC_A(4) AC_A(5) AC_A(6) AC_A(7) AC_R(1) AC_R(0) AC_R(3) AC_R(2) XOUT VBAT VREG VMULT PA(2)/ PD1(2) PA(3)/ PD1(3) PA(4)/ PD1(4) PA(5)/ PD1(5) PA(6)/ PD1(6) PA(7) PD1(7) PB(0) PB(1) PB(2) PB(3) PB(4) PB(5) PB(6) PB(7) SPI(0) SPI(1) SPI(2) SPI(3)
Package
name LCD_VR1 LCD_IO(4) LCD_IO(5) LCD_IO(6) LCD_IO(7) LCD_IO(8) LCD_IO(9) LCD_IO(10) LCD_IO(11) LCD_IO(12) LCD_IO(13) LCD_IO(14) LCD_IO(15) LCD_IO(16) LCD_IO(17) LCD_IO(18) LCD_IO(19) LCD_IO(20) LCD_IO(21) LCD_IO(22) LCD_IO(23) LCD_IO(24) LCD_IO(25) LCD_IO(26) LCD_IO(27) LCD_IO(28) LCD_IO(29) LCD_IO(30) LCD_IO(31) LCD_COM(1) LCD_COM(0) VGEN_VA VGEN_V1 VGEN_V2 VGEN_V3 VGEN_VB VBAT PA(0)/PD1(0) PA(1)/ PD1(1)
Table 1-2. Bonding plan LQFP-80 package (LQFP 14x14mm thick
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
PD1(6)/PA(6)
PD1(5)/PA(5)
PD1(4)/PA(4)
PD1(3)/PA(3)
PD1(2)/PA(2)
PD1(7)
SPI(3)
SPI(2)
SPI(1)
SPI(0)
PA(7)
PB(7)
PB(6)
PB(5)
PB(4)
PB(3)
PB(2)
PB(1)
PB(0)
LCD_VR1 LCD_IO(4) LCD_IO(5) LCD_IO(6) LCD_IO(7) LCD_IO(8) LCD_IO(9) LCD_IO(10) LCD_IO(11) LCD_IO(12) LCD_IO(13) LCD_IO(14) LCD_IO(15) LCD_IO(16) LCD_IO(17) LCD_IO(18) LCD_IO(19) LCD_IO(20) LCD_IO(21) LCD_IO(22)
VMULT VREG VBAT XOUT AC_R(2) AC_R(3) AC_R(0) AC_R(1)
AC_A(7) AC_A(6) AC_A(5) AC_A(4) AC_A(3) AC_A(2) AC_A(1) AC_A(0) TEST
VGEN_VB
VGEN_VA
VGEN_V1
VGEN_V2
LCD_IO(23)
LCD_IO(24)
LCD_IO(25)
LCD_IO(26)
LCD_IO(27)
LCD_IO(28)
LCD_IO(29)
LCD_IO(30)
LCD_IO(31)
VGEN_V3
PD1(0)/PA(0)
LCD_COM(1)
LCD_COM(0)
Figure 1-3. LQFP-
assignment
table below gives short description different assignments.
VBAT VREG NRESET TEST XIN/XOUT PA(7:0) PB(7:0) PD1(7:0) PD2(7:0) SPI(3:0) LCD_IO(29:0) LCD_IO(31:30) LCD_COM(1:0) LCD_VR1/LCD_VR2 VGEN_Vx AC_A(7:0) AC_R(3:0) VMULT
Assignment
Positive power supply Negative power supply Connection mandatory external capacitor voltage regulator High voltage supply flash memory programming versions) Resets circuit when voltage Sets flash programming mode Quartz crystal connections, also used flash memory programming Parallel input port pins Parallel port pins Parallel port pins Parallel port pins Serial port general purpose port pins segment driver general purpose port pins segment driver back plane driver general purpose port pins back plane driver pins supply voltage driver voltage generation pins Acquisition chain input pins Acquisition chain reference pins Connection external capacitor voltage multiplier
Table 1-3. assignment
PD1(1)/PA(1)
VBAT
NRESET
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Table gives more detailed different pins different packages. also indicates possible configuration these pins. indications blue bold configuration start-up. Please note that LQFP-80 package several functions routed same package pins. These pins indicated italic. number lqfp-100 lqfp-80 Function configuration
PD2(3) PD2(4) PD2(5) PD2(6) PD2(7) NRESET TEST AC_A(0) AC_A(1) AC_A(2) AC_A(3) AC_A(4) AC_A(5) AC_A(6) AC_A(7) AC_R(1) AC_R(0) AC_R(3) AC_R(2) XOUT VBAT VREG VMULT PA(2) PD1(2) PA(3) PD1(3) PA(4) PD1(4) PA(5) PD1(5) PA(6) PD1(6) PA(7) PD1(7) PB(0) PB(1) PB(2) PB(3) PB(4)
CNTC CNTD
PWM0 PWM1
USRT_S0
CMPD(0)
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POWER
second
SNAP
third
first
Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
PB(5) PB(6) PB(7) SPI(0) SPI(1) SPI(2) SPI(3) LCD_VR2 LCD_IO(0) LCD_IO(1) LCD_IO(2) LCD_IO(3) LCD_VR1 LCD_IO(4) LCD_IO(5) LCD_IO(6) LCD_IO(7) LCD_IO(8) LCD_IO(9) LCD_IO(10) LCD_IO(11) LCD_IO(12) LCD_IO(13) LCD_IO(14) LCD_IO(15) LCD_IO(16) LCD_IO(17) LCD_IO(18) LCD_IO(19) LCD_IO(20) LCD_IO(21) LCD_IO(22) LCD_IO(23) LCD_IO(24) LCD_IO(25) LCD_IO(26) LCD_IO(27) LCD_IO(28) LCD_IO(29) LCD_IO(30) LCD_IO(31) LCD_COM(1) LCD_COM(0) VGEN_VA VGEN_V1 VGEN_V2 VGEN_V3
USRT_S1 UART_Tx UART_Rx
CMPD(1) CMPD(2) CMPD(3)
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
VGEN_VB VBAT PD1(0) PA(0) PD1(1) PA(1) PD2(0) PD2(1) PD2(2)
CNTA CNTB
table legend: blue bold: configuration start analog input analog output digital input digital output nMOS open drain output pull-up resistor pull-down resistor SNAP: snap-to-rail function (see peripheral description detailed description) POWER: power supply
Table 1-4. description table
1-10
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
XE88LC02 performance
2.4.1 2.4.2 2.4.3
ABSOLUTE MAXIMUM RATINGS OPERATING RANGE CURRENT CONSUMPTION OPERATING SPEED Flash circuit version circuit version with regulator circuit version with regulator SIMPLIFIED SUPPLY SELECTION CRITERIA
LC02 aout 2003
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Absolute maximum ratings
Table 2-1. Absolute maximal ratings Min. Voltage applied VBAT with respect Voltage applied with respect Voltage applied pins except VBAT Storage temperature (ROM device unprogrammed flash device) Storage temperature (programmed flash device) -0.3 VBAT-0.3 VSS-0.3 Max. VBAT+0.3 Note
Stresses beyond absolute maximal ratings cause permanent damage device. Functional operation absolute maximal ratings implied. Exposure conditions beyond absolute maximal ratings affect reliability device.
Operating range
Table 2-2. Operating range flash device Min. Voltage applied VBAT with respect Voltage applied VBAT with respect during flash programming Voltage applied with respect Voltage applied pins except VBAT Operating temperature range Capacitor VREG (flash version) Capacitor VMULT VBAT Max. 11.5 VBAT Note
During programming device temperature must between 10°C 40°C. capacitor VREG mandatory. capacitor VMULT optional. capacitor present multiplier enabled. multiplier enabled VBAT<3.0V.
Table 2-3. Operating range device Min. Voltage applied VBAT with respect Acquisition chain Acquisition chain VREG bypassed VREG VMULT VMULT Max. VBAT Note
Voltage applied pins except VBAT Operating temperature range Capacitor VREG Capacitor VMULT
capacitor omitted when VREG connected VBAT. voltage reference drivers starts operating capacitor VMULT optional. capacitor present multiplier enabled. multiplier enabled VBAT<3.0V.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
specifications this document valid complete operating range unless otherwise specified. Table 2-4. Operating range Flash memory Min. Retention time 85°C Retention time 55°C Number programming cycles Max. years years Note
Valid only programmed using programming tool that qualified Circuits programmed more than times that case, retention time longer guaranteed.
Current consumption
tables below give current consumption circuit different configurations. figures indicative only change function actual software implemented circuit. Table gives current consumption flash version circuit. peripherals disabled. parallel ports configured input with pull Their pins connected externally. Table 2-5. Typical current consumption XE88LC02M version instructions flash memory) Operation mode High speed MIPS Xtal Consumption 11.0 14.5 comments 2.4V<>5.5V, 27°C Note
speed
MIPS
2.4V <>5.5V, 27°C
power
kIPS
2.4V <>5.5V, 27°C
power time keeping Fast wake-up time keeping Immediate wakeup time keeping static current CMPD static current
HALT HALT HALT
Ready
32kHz
2.4V <>5.5V, 27°C 2.4V <>5.5V, 27°C 2.4V <>5.5V, 27°C 2.4V <>5.5V, 27°C 2.4V <>5.5V, 27°C
Software without data access 100% power access 100% access typical software
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Table 2-6. Current consumption XE88LC02R version instructions memory) Operation mode High speed Max. Speed speed power voltage power time keeping MIPS MIPS MIPS kIPS kIPS HALT Xtal Consumption comments 2.4V<>5.5V, 27°C 2.4V<>5.5V, 27°C 2.4V <>5.5V, 27°C 2.4V <>5.5V, 27°C 1.2V, 27°C 2.4V <>5.5V, 27°C Note
Software using MOVE instruction using internal registers peripheral registers Hints power operation: power instead parameters that accessed frequently. average current consumption power about times lower than RAM. Rather than using circuit speed, better circuit higher speed switch blocks when needed. power consumption program memory important part overall power consumption. case intend version power consumption high, please provide with circuit version with smaller size.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
2.4.1
Operating speed
Flash circuit version
speed flash devices highly dependent upon supply voltage. However, limiting temperature range, speed increased. minimal guaranteed speed function supply voltage maximal temperature operating temperature given Figure 2-1.
VBAT VREG
Figure 2-2. Supply configuration flash circuit operation.
speed (MIPS)
85°C
45°C
supply voltage VBAT
Figure 2-3. Guaranteed speed function supply voltage maximal temperature. Note that speed flash circuit version limited flash memory. other peripherals device same speed version (see Figure 2-5). maximal speed peripherals exploited reducing frequency factor with respect clock source executing instruction "FREQ div2". Take care execute this instruction before increasing clock speed above figures given Figure 2-3.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
2.4.2
circuit version with regulator
version, possible operating modes exist: with without voltage regulator. Using voltage regulator, power consumption will obtained even with supply voltages above 2.4V. Without voltage regulator (i.e. VREG short-circuited VBAT), higher speed obtained.
VBAT VREG 100nF
Figure 2-4. Supply configuration circuit operation using internal regulator.
85°C speed (MIPS)
45°C
125°C
supply voltage VBAT
Figure 2-5. Guaranteed speed function supply voltage different maximal temperatures using voltage regulator.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
2.4.3
circuit version with regulator
VBAT VREG
Figure 2-6. Supply configuration circuit operation by-passing internal regulator.
85°C speed (MIPS)
45°C
125°C
supply voltage VBAT
Figure 2-7. Guaranteed speed function supply voltage temperature ranges when VREG=VBAT. Important Note Note that acquisition chain will operate VBAT below 2.4V. internal reference voltage will operate below 1.5V. internal reference used, voltage generator driver will operate down 1.2V. operation range different blocks summarized Figure 2-8.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Simplified supply selection criteria
devices always require capacitor VREG VREG cannot shorted VBAT devices. devices operate with lowest current requirement with capacitor VREG, VREG shorted VBAT. devices operate highest speed with VREG shorted VBAT. operation always above capacitor VMULT needed VMULT always off. acquisition chain used between then capacitor VMULT must present VMULT must during operation below acquisition chain does operate below internal reference voltage does operate below
acquisition chain VMULT acquisition chain VMULT Vgen internal reference (VBATVREG) parallel serial ports driver Vgen int. ref.) crystal oscillator Comparators Counters (VBAT=VREG) VBAT
Figure 2-8. Operating voltage range different circuit blocks. devices operate below 2.4V. devices operate different voltage ranges VREG VBAT short circuited not.
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description internal registers instruction short reference
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description
XE8000 series power RISC core. internal registers efficient implementation compiler. instruction made generic instructions, coded bits, with addressing modes. instructions executed clock cycle, including conditional jumps multiplication. circuit therefore runs MIPS 1MHz clock. hardware software description given document "Coolrisc816 Hardware Software Reference Manual". short summary given following paragraphs. good code efficiency core makes possible compute polynomial like less than clock cycles (software code generated XEMICS C-compiler, numbers signed integers bits).
internal registers
shown Figure 3-1, internal 8-bit registers. Some these registers concatenated 16-bit word some instructions. function these registers defined Table 3-1. status register stat (Table 3-2) used manage different interrupt event levels. interrupt event both used wake after HALT instruction. difference that interrupt jumps special interrupt function whereas event continues software execution with instruction following HALT instruction. program counter (PC) register that indicates address instruction that executed. stack (STn) used memorise return address when executing subroutines interrupt routines.
program counter stack instruction
stat data internal registers
Instruction memory 22bit
Data memory
Figure 3-1. internal registers
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Register name stat
Register function general purpose general purpose general purpose data memory offset data memory index data memory index data memory index data memory index data memory index data memory index data memory index data memory index program memory index program memory index status register accumulator
Table 3-1. internal register definition name function enables (when interrupt request level enables (when interrupt request level enables (when interrupt request levels interrupt request level interrupts labelled "low" interrupt handler routed this interrupt level. This cleared when interrupt served. interrupt request level interrupts labelled "mid" interrupt handler routed this interrupt level. This cleared when interrupt served. interrupt request level interrupts labelled "hig" interrupt handler routed this interrupt level. This cleared when interrupt served. event request level events labelled "low" event handler routed this event level. This cleared when event served. event request level events labelled "hig" event handler routed this event level. This cleared when event served.
Table 3-2. Status register description also number flags that used conditional jumps. These flags defined Table 3-3. symbol name zero carry function when accumulator content zero This flag used shift arithmetic operations. shift operation, value that shifted (LSB shift right, shift left). arithmetic operation with unsigned numbers: occurrence overflow during addition equivalent). occurrence underflow during subtraction equivalent). This flag used shift arithmetic operations. arithmetic shift operations with signed numbers, overflow underflow occurs.
overflow
Table 3-3. Flag description
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
instruction short reference
Table shows short description different instructions available Coolrisc816. notation conditional jump instruction refers condition description given Table 3-6. notation reg, reg1, reg2, reg3 refers internal registers Table 3-1. notation eaddr DM(eaddr) refer extended address modes defined Table 3-5. notation DM(xxx) refers data memory location with address xxx.
Instruction
Jump addr[15:0] Jump addr[15:0] Call addr[15:0] Call Calls addr[15:0] Calls Rets Reti Push Move reg,#data[7:0] Move reg1, reg2 Move reg, eaddr Move eaddr, Move addr[7:0],#data[7:0] Cmvd reg1, reg2 Cmvd reg, eaddr Cmvs reg1, reg2 Cmvs reg, eaddr reg1, reg2 reg, eaddr Shlc reg1, reg2 Shlc Shlc reg, eaddr reg1, reg2 reg, eaddr Shrc reg1, reg2 Shrc Shrc reg, eaddr Shra reg1, reg2 Shra Shra reg, eaddr Cpl1 reg1, reg2 Cpl1 Cpl1 reg, eaddr Cpl2 reg1, reg2 Cpl2 Cpl2 reg, eaddr Cpl2c reg1, reg2 Cpl2c Cpl2c reg, eaddr reg1, reg2 reg, eaddr Incc reg1, reg2 Incc Incc reg, eaddr reg1, reg2
Modification
-,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-,-, -,-, -,-, -,-, -,-,-, -,-,-, -,-, -,-, -,-, -,-, -,-, -,-, -,-,
Operation
addr[15:0] true then addr[15:0] true then STn+1 (n>1); PC+1; addr[15:0] STn+1 (n>1); PC+1; PC+1; addr[15:0] PC+1; ST1; STn+1 (n>1) ST1; STn+1 (n>1); PC+1; STn+1 (n>1); PC+1; ST1; STn+1 (n>1) data[7:0]; data[7:0] reg2; reg1 reg2 DM(eaddr); DM(eaddr) DM(eaddr) DM(addr[7:0]) data[7:0] reg2; then reg1 DM(eaddr); then reg2; then reg1 DM(eaddr); then reg2<<1; a[0] reg2[7]; reg1 reg<<1; a[0] reg[7]; DM(eaddr)<<1; a[0] :=0; DM(eaddr)[7]; reg2<<1; a[0] reg2[7]; reg1 reg<<1; a[0] reg[7]; DM(eaddr)<<1; a[0] DM(eaddr)[7]; reg2>>1; a[7] reg2[0]; reg1 reg>>1; a[7] reg[0]; DM(eaddr)>>1; a[7] DM(eaddr)[0]; reg2>>1; a[7] reg2[0]; reg1 reg>>1; a[7] reg[0]; DM(eaddr)>>1; a[7] DM(eaddr)[0]; reg2>>1; a[7] reg2[7]; reg2[0]; reg1 reg>>1; a[7] reg[7]; reg[0]; DM(eaddr)>>1; a[7] DM(eaddr)[7]; DM(eaddr)[0]; NOT(reg2); reg1 NOT(reg); NOT(DM(eaddr)); NOT(reg2)+1; then C:=1 else reg1 NOT(reg)+1; then C:=1 else NOT(DM(eaddr))+1; then C:=1 else NOT(reg2)+C; then C:=1 else reg1 NOT(reg)+C; then C:=1 else NOT(DM(eaddr))+C; then C:=1 else reg2+1; then else reg1 reg+1; then else DM(eaadr)+1; then else reg2+C; then else reg1 reg+C; then else DM(eaadr)+C; then else reg2-1; a=hFF then else reg1
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
reg, eaddr Decc reg1, reg2 Decc Decc reg, eaddr reg,#data[7:0] reg1, reg2, reg3 reg1, reg2 reg, eaddr reg,#data[7:0] reg1, reg2, reg3 reg1, reg2 reg, eaddr reg,#data[7:0] reg1, reg2, reg3 reg1, reg2 reg, eaddr reg,#data[7:0] reg1, reg2, reg3 reg1, reg2 reg, eaddr Addc reg,#data[7:0] Addc reg1, reg2, reg3 Addc reg1, reg2 Addc reg, eaddr Subd reg,#data[7:0] Subd reg1, reg2, reg3 Subd reg1, reg2 Subd reg, eaddr Subdc reg,#data[7:0] Subdc reg1, reg2, reg3 Subdc reg1, reg2 Subdc reg, eaddr Subs reg,#data[7:0] Subs reg1, reg2, reg3 Subs reg1, reg2 Subs reg, eaddr Subsc reg,#data[7:0] Subsc reg1, reg2, reg3 Subsc reg1, reg2 Subsc reg, eaddr reg,#data[7:0] reg1, reg2, reg3 reg1, reg2 reg, eaddr Mula reg,#data[7:0] Mula reg1, reg2, reg3 Mula reg1, reg2 Mula reg, eaddr Mshl reg,#shift[2:0] Mshr reg,#shift[2:0] Mshra reg,#shift[2:0] reg,#data[7:0] reg1, reg2 reg, eaddr Cmpa reg,#data[7:0] Cmpa reg1, reg2 Cmpa reg, eaddr Tstb reg,#bit[2:0] Setb reg,#bit[2:0] Clrb reg,#bit[2:0] Invb reg,#bit[2:0]
-,-, -,-, -,-, -,-, -,-, -,-, -,-, -,-, -,-, -,-, -,-, -,-,
reg-1; a=hFF then else DM(eaddr)-1; a=hFF then else reg2-(1-C); a=hFF then else reg1 reg-(1-C); a=hFF then else DM(eaddr)-(1-C); a=hFF then else data[7:0]; reg2 reg3; reg1 reg1 reg2; reg1 DM(eaddr); data[7:0]; reg2 reg3; reg1 reg1 reg2; reg1 DM(eaddr); data[7:0]; reg2 reg3; reg1 reg1 reg2; reg1 DM(eaddr); reg+data[7:0]; overflow then C:=1 else reg2+reg3; overflow then C:=1 else reg1 reg1+reg2; overflow then C:=1 else reg1 reg+DM(eaddr); overflow then C:=1 else reg+data[7:0]+C; overflow then C:=1 else reg2+reg3+C; overflow then C:=1 else reg1 reg1+reg2+C; overflow then C:=1 else reg1 reg+DM(eaddr)+C; overflow then C:=1 else data[7:0]-reg; underflow then else reg2-reg3; underflow then else reg1 reg2-reg1; underflow then else reg1 DM(eaddr)-reg; underflow then else data[7:0]-reg-(1-C); underflow then else reg2-reg3-(1-C); underflow then else reg1 reg2-reg1-(1-C); underflow then else reg1 DM(eaddr)-reg-(1-C); underflow then else reg-data[7:0]; underflow then else reg3-reg2; underflow then else reg1 reg1-reg2; underflow then else reg1 reg-DM(eaddr); underflow then else reg-data[7:0]-(1-C); underflow then else reg3-reg2-(1-C); underflow then else reg1 reg1-reg2-(1-C); underflow then else reg1 reg-DM(eaddr)-(1-C); underflow then else (data[7:0]*reg)[7:0]; (data[7:0]*reg)[15:8] (reg2*reg3)[7:0]; reg1 (reg2*reg3)[15:8] (reg2*reg1)[7:0]; reg1 (reg2*reg1)[15:8] (DM(eaddr)*reg)[7:0]; (DM(eaddr)*reg)[15:8] (data[7:0]*reg)[7:0]; (data[7:0]*reg)[15:8] (reg2*reg3)[7:0]; reg1 (reg2*reg3)[15:8] (reg2*reg1)[7:0]; reg1 (reg2*reg1)[15:8] (DM(eaddr)*reg)[7:0]; (DM(eaddr)*reg)[15:8] (reg*2 )[7:0]; (reg*2 )[15:8] (8-shift (8-shift (reg*2 )[7:0]; (reg*2 )[15:8] (8-shift (8-shift (reg*2 )[7:0]; (reg*2 )[15:8] data[7:0]-reg; underflow then else C:=1; (not reg2-reg1; underflow then else C:=1; (not DM(eaddr)-reg; underflow then else C:=1; (not data[7:0]-reg; underflow then else C:=1; (not reg2-reg1; underflow then else C:=1; (not DM(eaddr)-reg; underflow then else C:=1; (not a[bit] reg[bit]; other bits reg[bit] other bits unchanged; reg[bit] other bits unchanged; reg[bit] reg[bit]; other bits unchanged;
shift shift
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Sflag Rflag Rflag eaddr Freq divn Halt
-,-,-, -,-,-, -,-,-, -,-,-,
a[7] a[6] a[5] full; a[4] empty a[0] reg[7] DM(eaddr)<<1; a[0] :=0; DM(eaddr)[7] reduces frequency (divn=nodiv, div2, div4, div8, div16) halts operation
unchanged, undefined, *MSHR reg,# doesn't shift
Table 3-4. Instruction short reference Coolrisc816 different addressing modes. These modes described Table 3-5. this table, notation refers data memory index registers Using eaddr instruction Table will access data memory address DM(eaddr) will simultaneously execute index operation.
extended address eaddr addr[7:0] (ix) (ix, offset[7:0]) (ix,r3) (ix)+ (ix,offset[7:0])+ -(ix) -(ix,offset[7:0]) accessed data memory location DM(eaddr) DM(h00&addr[7:0]) DM(ix) DM(ix+offset) DM(ix+r3) DM(ix) DM(ix+offset) DM(ix-1) DM(ix-offset) index operation ix+1 ix+offset ix-1 -offset direct addressing indexed addressing indexed addressing with immediate offset indexed addressing with register offset indexed addressing with index post-increment indexed addressing with index post-increment offset indexed addressing with index pre-decrement indexed addressing with index pre-decrement offset
Table 3-5. Extended address mode description Eleven different jump conditions implemented shown Table 3-6. contents column this table should replace notation instruction description Table 3-4.
condition
(EV1 EV0)=1
After op1,op2
op1=op2 op1op2 op1>op2 op1op2 op1<op2 op1op2
Table 3-6. Jump condition description
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Memory mapping
4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 4.2.6 4.2.7 4.2.8 4.2.9 4.2.10 4.2.11 4.2.12 4.2.13 4.2.14 4.2.15 4.2.16 4.2.17 4.2.18 4.2.19 4.2.20
Memory organisation Quick reference data memory register power data registers (h0000-h0007) System, clock configuration reset configuration (h0010-h001F) Port (h0020-h0027) Port (h0028-h002F) Port (h0030-h0033) Port (h0034-h0037) Flash programming (h0038-003B) Event handler (h003C-h003F) Interrupt handler (h0040-h0047) USRT (h0048-h004F) UART (h0050-h0057) Counter/Timer/PWM registers (h0058-h005F) Acquisition chain registers (h0060-h0067) registers (h0068-h006F) voltage generator registers (h0070) Comparator registers (h0072-h0073) Voltage multiplier (h007C) Voltage Level Detector registers (h007E-h007F) (h0080-h047F) driver (h8000-8022)
LC02 october 2002
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Memory organisation
XE88LC02 built with Harvard architecture. Harvard architecture uses separate instruction data memories. instruction data also separated. advantage such structure that instruction read/write data simultaneously. circuit configuration shown Figure 4-1. internal registers. instruction memory capacity 8192 22-bit instructions. data memory space power registers, peripheral register space, 1024 bytes control register space.
0h1FFF
0h8022
instruction
registers 0h8000 0h047F
stat data internal registers
capacity: 1024 bytes
capacity: 22bit
0h0080 0h007F Peripheral registers 0h0008 power 0h0000
0h0000
Figure 4-1. Memory mapping internal registers described chapter. short reference power registers peripheral registers given 4.2.
Quick reference data memory register
data register given tables below. more detailed description different registers given detailed description different peripherals. tables give following information: register name register address different bits register access mode different bits (see Table 4-4-1 code description) reset source reset value different bits
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Data memory
Instruction memory
Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
reset source coding given Table 4-4-2. full description reset sources, please refer reset block chapter. code access mode read written always reads always reads cleared writing value cleared writing cleared after reading special function, verify detailed description respective peripherals Table 4-4-1. Access mode codes used register definitions code glob cold pconf sleep reset source nresetglobal nresetcold nresetpconf nresetsleep
Table 4-4-2. Reset source coding used register definitions 4.2.1
Address Reg00 h0000 Reg01 h0001 Reg02 h0002 Reg03 h0003 Reg04 h0004 Reg05 h0005 Reg06 h0006 Reg07 h0007
power data registers (h0000-h0007)
Name Reg00[7:0] 00000000, glob Reg01[7:0] rw,00000000,glob Reg02[7:0] rw,00000000,glob Reg03[7:0] rw,00000000,glob Reg04[7:0] rw,00000000,glob Reg05[7:0] rw,00000000,glob Reg06[7:0] rw,00000000,glob Reg07[/:0] rw,0000000,glob
Table 4-4-3. power data registers
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
4.2.2
System, clock configuration reset configuration (h0010-h001F)
EnResetPConf
Name Address RegSysCtrl SleepEn h0010 rw,0,cold RegSysReset Sleep h0011 rw,0,glob RegSysClock CpuSel h0012 rw,0,sleep RegSysMisc h0013 RegSysWd h0014 RegSysPre0 h0015 RegSysRcTrim1 h001B RegSysRcTrim2 h001C
rw,0,cold SleepFlag rc,0,cold
EnBusError rw,0,cold
ResetBusError
cold EnExtClock rw,0,cold
EnResetWD rw,0,cold ResetWD cold BiasRC rw,1,cold RcFreqRange rw,0,cold
ResetfromportA
cold ColdXtal r,1,sleep
EnableXtal EnableRC rw,0,sleep rw,1,sleep Output16k OutputCpuCk rw,0,sleep rw,0,sleep WatchDog[3:0] s,0000,glob
ClearLowPresca
c1r0,0,-
RcFreqCoarse[3:0] rw,0001,cold RcFreqFine[5:0] rw,00000,cold
Table 4-4-4. Reset block clock block registers 4.2.3
Address RegPAIn h0020 RegPADebounce h0021 RegPAEdge h0022 RegPAPullup h0023 RegPARes0 h0024 RegPARes1 h0025 RegPACtrl h0026 RegPASnaptorail h0027
Port (h0020-h0027)
Name PAIn[7:0] PADebounce[7:0] rw,00000000,pconf PAEdge[7:0] rw,00000000,glob PAPullup[7:0] rw,11111111,pconf PARes0[7:0] 00000000, glob PARes1[7:0] rw,00000000,glob PASnaptorail[7:0] rw,00000000,pconf
DebFast rw,0,pconf
Table 4-4-5. Port registers 4.2.4
Address RegPBOut h0028 RegPBIn h0029 RegPBDir h002A RegPBOpen h002B RegPBPullup h002C RegPBAna h002D
Port (h0028-h002F)
Name PBOut[7:0] rw,00000000,pconf PBIn[7:0] PBDir[7:0] rw,00000000,pconf PBOpen[7:0] rw,00000000,pconf PBPullup[7:0] rw,11111111,pconf PBAna[7:0] rw,00000000,pconf
Table 4-4-6. Port registers
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
4.2.5
Port (h0030-h0033)
PD1Out[7:0] rw,00000000,pconf PD1In[7:0] PD1Dir[7:0] rw,00000000,pconf
Name Address RegPD1Out h0030 RegPD1In h0031 RegPD1Dir h0032 RegPD1Pullup h0033
PD1SnapToRail[3:0] rw,0000,pconf
PD1Pullup[3:0] rw,1111,pconf
Table 4-4-7. Port registers 4.2.6 Port (h0034-h0037)
PD2Out[7:0] rw,00000000,pconf PD2In[7:0] PD2Dir[7:0] rw,00000000,pconf
Name Address RegPD2Out h0034 RegPD2In h0035 RegPD2Dir h0036 RegPD2Pullup h0037
PD2SnapToRail[3:0] rw,0000,pconf
PD2Pullup[3:0] rw,1111,pconf
Table 4-4-8. Port registers 4.2.7 Flash programming (h0038-003B)
These four registers used during flash programming only. Refer flash programming algorithm documentation more details. 4.2.8
Address RegEvn h003C RegEvnEn h003D RegEvnPriority h003E RegEvnEvn h003F
Event handler (h003C-h003F)
Name CntIrqA rc1,0,glob CntIrqC rc1,0,glob 128Hz rc1,0,glob PAEvn[1] CntIrqB rc1,0,glob rc1,0,glob EvnEn[7:0] rw,00000000,glob EvnPriority[7:0] r,11111111,glob CntIrqD rc1,0,glob rc1,0,glob PAEvn[0] rc1,0,glob
EvnHigh r,0,glob
EvnLow r,0,glob
Table 4-4-9. Event handler registers origin different events summarised table below. Event CntIrqA CntIrqB CntIrqC CntIrqD 128Hz PAEvn[1:0] Event source Counter/Timer (counter block) Counter/Timer (counter block) Counter/Timer (counter block) Counter/Timer (counter block) prescaler (clock block) prescaler (clock block) Port
Table 4-4-10. Event source description
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
4.2.9
Address
Interrupt handler (h0040-h0047)
Name 128Hz rc1,0,glob UrstCond1 rc1,0,glob PAIrq[6] rc1,0,glob IrqSPI rc1,0,glob PAIrq[5] rc1,0,glob CntIrqB rc1,0,glob CntIrqA CntIrqC rc1,0,glob rc1,0,glob PAIrq[4] rc1,0,glob rc1,0,glob CntIrqD PAIrq[3] rc1,0,glob rc1,0,glob IrqEnHig[7:0] rw,0000000,glob IrqEnMid[7:0] rw,0000000,glob IrqEnLow[7:0] rw,0000000,glob IrqPriority[7:0] r,11111111,glob CmpdIrq rc1,0,glob VldIrq rc1,0,glob PAIrq[2] rc1,0,glob UartIrqTx rc1,0,glob PAIrq[1] rc1,0,glob UartIrqRx rc1,0,glob PAIrq[0] rc1,0,glob
IrqAC h0040 rc1,0,glob RegIrqMid UsrtCond2 h0041 rc1,0,glob RegIrqLow PAIrq[7] h0042 rc1,0,glob RegIrqEnHig h0043 RegIrqEnMid h0044 RegIrqEnLow h0045 RegIrqPriority h0046 RegIrqIrq h0047 RegIrqHig
IrqHig r,0,glob
IrqMid r,0,glob
IrqLow r,0,glob
Table 4-4-11. Interrupt handler registers origin different interrupts summarised table below. Event CmpdIrq CntIrqA CntIrqB CntIrqC CntIrqD 128Hz PAIrq[7:0] UartIrqRx UartIrqTx UrstCond1 UsrtCond2 VldIrq IrqAC IrqSPI Event source power comparators Counter/Timer (counter block) Counter/Timer (counter block) Counter/Timer (counter block) Counter/Timer (counter block) prescaler (clock block) prescaler (clock block) Port UART reception UART transmission USRT condition USRT condition Voltage level detector Acquisition chain conversion interrupt reception/transmission interrupt
Table 4-4-12. Interrupt source description
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
4.2.10
USRT (h0048-h004F)
UsrtWaitS0 r,0,glob
UsrtEnWaitCond1
Name Address RegUsrtS1 h0048 RegUsrtS0 h0049 RegUsrtCond1 h004A RegUsrtCond2 h004B RegUsrtCtrl h004C RegUsrtBufferS1 h004D RegUsrtEdgeS0 h004E
rw,0,glob
UsrtS1 s,1,glob UsrtS0 s,1,glob UsrtCond1 rc,0,glob UsrtCond2 rc,0,glob UsrtEnWaitS0 UsrtEnable rw,0,glob rw,0,glob UsrtBufferS1 r,0,glob UsrtEdgeS0 r,0,glob
Table 4-4-13. USRT register description 4.2.11 UART (h0050-h0057)
UartEcho rw,0,glob SelXtal rw,0,glob UartEnRx rw,0,glob UartEnTx rw,0,glob UartXRx UartXTx rw,0,glob rw,0,glob UartRcSel[2:0] rw,000,glob UartTx[7:0] rw,0000000,glob UartPM rw,0,glob UartBR[2:0] rw,101,glob UartPE rw,0,glob UartWL rw,1,glob
Name Address RegUartCtrl h0050 RegUartCmd h0051 RegUartTx h0052 RegUartTxSta h0053 RegUartRx h0054 RegUartRxSta h0055
UartTxBusy UartTxFull r,0,glob r,0,glob UartRx[7:0] r,00000000,glob UartRxSErr UartRxPErr UartRxFErr UartRxOerr UartRxBusy UartRxFull r,0,glob r,0,glob r,0,glob rc,0,glob r,0,glob r,0,glob
Table 4-14. UART register description
4.2.12
Address
Counter/Timer/PWM registers (h0058-h005F)
Name RegCntA CounterA[7:0] s,00000000,glob CounterB[7:0] s,00000000,glob CounterC[7:0] s,00000000,glob CounterD[7:0] s,00000000,glob CntDCkSel[1:0] CntCCkSel[1:0] CntBCkSel[1:0] CntACkSel[1:0] rw,00,glob rw,00,glob rw,00,glob rw,00,glob CntDDownUp CntCDownUp CntBDownUp CntADownUp CascadeCD CascadeAB CntPWM1 CntPWM0 rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob CapSel[1:0] CapFunc[1:0] Pwm1Size[1:0] Pwm0Size[1:0] rw,00,glob rw,00,glob rw,00,glob rw,00,glob CntDExtDiv CntCExtDiv CntBExtDiv CntAExtDiv CntDEnable CntCEnable CntBEnable CntAEnable rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob rw,0,glob
h0058 RegCntB h0059 RegCntC h005A RegCntD h005B RegCntCtrlCk h005C RegCntConfig1 h005D RegCntConfig2 h005E RegCntOn h005F
Table 4-15. Counter/timer/PWM register description.
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4.2.13
Acquisition chain registers (h0060-h0067)
Name Address RegAcOutLsb OUT[7:0] h0060 r,0,glob RegAcOutMsb OUT[15:8] h0061 r,0,glob RegAcCfg0 START SET_NELCONV[1:0] SET_OSR[2:0] CONT rw,010,glob h0062 r0,0,glob rw,01,glob rw,0,glob RegAcCfg1 IB_AMP_ADC[1:0] IB_AMP_PGA[1:0] ENABLE[3:0] h0063 rw,11,glob rw,11,glob rw,0000,glob RegAcCfg2 PGA2_GAIN[1:0] PGA2_OFFSET[3:0] h0064 rw,00,glob rw,00,glob rw,0000,glob RegAcCfg3 PGA1_GAIN PGA3_GAIN[6:0] h0065 rw,0000000,glob Rw,0,glob PGA3_OFFSET RegAcCfg4 rw,0000000,glob h0066 RegAcCfg5 BUSY AMUX[4:0] h0067 r,0,glob rw,00000,glob
VMUX rw,0,glob
Table 4-16. Acquisition chain register description. 4.2.14 registers (h0068-h006F)
SpiMaster rw,1,glob SpiEnable ClockPhase ClockPolarity BaudRate[1:0] rw,0,glob rw,1,glob rw,00,glob rw,0,glob SpiOverflow SpiRxFull SpiTxEmpty c1,0,glob r,0,glob w1,1,glob SpiDataOut[7:0] rw,00000000,glob SpiDataIn[7:0] r,00000000,glob SpiPullup[3:0] rw,1111,pconf SpiDir[3:0] rw,0000,pconf
Name Address RegSpiControl ClearCounter NotSlaveSelect rw,1,glob h0068 RegSpiStatus h0069 RegSpiDataOut h006A RegSpiDataIn h006B RegSpiPullup h006C RegSpiDir h006D
Table 4-17. register description. 4.2.15 voltage generator registers (h0070)
VgenClkSel[1:0] rw,10,glob VgenOff rw,1,glob VgenMode rw,0,glob VgenStdb rw,0,glob VgenRefEn rw,0,glob
Name Address RegVgenCfg0 h0070
Table 4-18. voltage generator register. 4.2.16 Comparator registers (h0072-h0073)
CmpdStat[3:0] rca,0000,glob IrqOnRising[2:0] rw,000,glob CmpdOut[3:0] r,0000,glob EnIrqCh[3:0] rw,0000,glob Enable rw,0,glob
Name Address RegCmpdStat h0072 RegCmpdCtrl h0073
Table 4-19. power comparator registers
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
4.2.17
Voltage multiplier (h007C)
Enable rw,0,glob Fin[1:0] rw,00,glob
Name Address RegVmultCfg0 h007C
Table 4-20. VMULT register. 4.2.18
Address RegVldCtrl h007E RegVldStat h007F
Voltage Level Detector registers (h007E-h007F)
Name VldRange rw,0,glob VldTune[2:0] rw,000,glob VldResult VldValid r,0,glob r,0,glob VldEn rw,0,glob
Table 4-21. Voltage level detector register description 4.2.19 (h0080-h047F)
1024 bytes accessed read write operations. reset function. Variables stored should initialised before since they have value circuit start 4.2.20 driver (h8000-8022)
LcdData0[7:0] rw,00000000,pconf LcdData1[7:0] rw,00000000,pconf LcdData2[7:0] rw,00000000,pconf LcdData3[7:0] rw,00000000,pconf LcdData4[7:0] rw,00000000,pconf LcdData5[7:0] rw,00000000,pconf LcdData6[7:0] rw,00000000,pconf LcdData7[7:0] rw,00000000,pconf LcdData8[7:0] rw,00000000,pconf LcdData9[7:0] rw,00000000,pconf LcdData10[7:0] rw,00000000,pconf LcdData11[7:0] rw,00000000,pconf LcdData12[7:0] rw,00000000,pconf LcdData13[7:0] rw,00000000,pconf LcdData14[7:0] rw,00000000,pconf LcdData15[7:0] rw,00000000,pconf PLcdOut0[7:0] rw,00000000,pconf PLcdOut1[7:0] rw,00000000,pconf
Name Address RegLcdData0 h8000 RegLcdData1 h8001 RegLcdData2 h8002 RegLcdData3 h8003 RegLcdData4 h8004 RegLcdData5 h8005 RegLcdData6 h8006 RegLcdData7 h8007 RegLcdData8 h8008 RegLcdData9 h8009 RegLcdData10 h800A RegLcdData11 h800B RegLcdData12 h800C RegLcdData13 h800D RegLcdData14 h800E RegLcdData15 h800F RegPLcdOut0 h8010 RegPLcdOut1 h8011
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
RegPLcdOut2 h8012 RegPLcdOut3 h8013 RegPLcdDir0 h8014 RegPLcdDir1 h8015 RegPLcdDir2 h8016 RegPLcdDir3 h8017 RegPLcdPullup0 h8018 RegPLcdPullup1 h8019 RegPLcdPullup2 h801A RegPLcdPullup3 h801B RegPLcdIn0 h801C RegPLcdIn1 h801D RegPLcdIn2 h801E RegPLcdIn3 h801F RegLcdOn h8020 RegLcdSe h8021 RegLcdClkFrame h8022
PLcdOut2[7:0] rw,00000000,pconf PLcdOut3[7:0] rw,00000000,pconf PLcdDir0[7:0] rw,00000000,pconf PLcdDir1[7:0] rw,00000000,pconf PLcdDir2[7:0] rw,00000000,pconf PLcdDir3[7:0] rw,00000000,pconf PLcdPullup0[7:0] rw,00000000,pconf PLcdPullup1[7:0] rw,00000000,pconf PLcdPullup2[7:0] rw,00000000,pconf PLcdPullup3[7:0] rw,00000000,pconf PLcdIn0[7:0] PLcdIn1[7:0] PLcdIn2[7:0] PLcdIn3[7:0] LcdSe3 rw,1,glob LcdSe7 LcdSe11 rw,1,glob rw,1,glob LcdDivFreq[2:0] rw,000,glob LcdSe15 rw,1,glob LcdSe19 rw,1,glob LcdSleep rw,1,glob LcdSe23 rw,1,glob LcdMux[1:0] rw,00,glob LcdSe27 LcdSe31 rw,1,glob rw,1,glob LcdFreq[1:0] rw,00,glob
Table 4-22. driver registers.
4-10
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power modes
5.1.1
FEATURES .5-2 Overview.5-2 OPERATING MODE .5-2
power modes 1.2- janvier 2001
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5.1.1
Features
Overview
XE8000 chips have three operating modes. These normal, current very current modes (see Figure 5-1). different modes controlled reset clock blocks (see documentation respective blocks).
Operating mode
Start-up bits reset design when padnreset active. enabled, Xtal disabled reset (pmaddr 0000). port used return from sleep mode, bits with nresetcold change (see sleep mode) Start-up bits with nresetglobal nresetpconf(if enabled) reset. Clock configuration doesn't change except cpuck (freqdiv reset, clock block). reset Active mode This mode where peripherals work execute embedded software. Standby mode Executing HALT instruction moves XE8000 into Standby mode. stopped, clocks remain active. Therefore, enabled peripherals remain active e.g. time keeping. reset interrupt/event request enabled) cancels standby mode. Sleep mode This very low-power mode because circuit clocks peripherals stopped. Only some service blocks remain active. time-keeping possible. instructions necessary move into sleep mode. First, SleepEn (sleep enable) RegSysCtrl sleep mode then activated setting Sleep RegSysReset There three possibe ways wake-up from sleep mode: (power-on-reset caused power-down followed power-on). information lost. padnreset Port reset combination Port present product). Port documentation more details. Note: Port used return from sleep mode, bits with nresetcold change (RegSysCtrl, RegSysReset (except sleep), Enextclock Biasrc RegSysClock, RegSysRcTrim1 RegSysRcTrim2). SleepFlag RegSysReset, reads back circuit sleep mode since flag last cleared (see reset block more details). recommended insert instruction after instruction that sets circuit sleep mode because this instruction executed when sleep mode left using resetfromportA.
Note:
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START-UP
without condition
padnreset
RESET
padnreset without condition portA reset watchdog reset buserror reset
padnreset padnreset portA reset
portA reset watchdog reset
Halt instruction
ACTIVE
Interrupt/event
STAND-BY
SLEEP
sleep
normal mode
current
very current
Figure 5-1. XE8000 operating modes.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Reset generator
6.5.1 6.5.2 6.5.3 6.5.4 6.5.5
FEATURES OVERVIEW REGISTER RESET HANDLING CAPABILITIES RESET SOURCE DESCRIPTION Power Reset NRESET Programmable Port input combination Watchdog reset BusError reset SLEEP MODE CONTROL REGISTER DESCRIPTION OPERATION WATCHDOG START-UP WATCHDOG SPECIFICATIONS
Reset generator aout 2003
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Features
Power Reset (POR) External reset from NRESET Programmable Watchdog timer reset Programmable BusError reset Sleep mode management
Product dependant: Programmable Port input combination reset
Overview
reset block reset manager. handles different reset sources distributes them through system. also controls sleep mode circuit.
Register
register name RegSysCtrl RegSysReset RegSysWd Table 6-1. Reset registers
Table gives different registers used this block.
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Pos.
RegSysCtrl SleepEn EnResetPConf
Reset nresetcold nresetcold
EnBusError EnResetWD
nresetcold nresetcold
0000
Function enables Sleep mode sleep mode disabled sleep mode enabled enables nresetpconf signal when nresetglobal active nresetpconf disabled nresetpconf enabled enables reset from BusError BusError reset source disabled BusError reset source enabled enables reset from Watchdog Watchdog reset source disabled Watchdog reset source enabled this unused
Table 6-2. RegSysCtrl register.
Pos.
RegSysReset Sleep SleepFlag ResetBusError ResetWD ResetfromportA
Reset nresetglobal nresetcold nresetcold nresetcold nresetcold
Function Sleep mode control (reads always Sleep mode active before reset source BusError reset source Watchdog reset source Port combination unused
Table 6-3. RegSysReset register
Pos.
RegSysWd WDKey[3] WDCounter[3] WDKey[2] WDCounter[2] WDKey[1] WDCounter[1] WDKey[0] WDCounter[0]
Reset 0000 nresetglobal nresetglobal nresetglobal nresetglobal
Function unused
Watchdog Watchdog counter Watchdog Watchdog counter Watchdog Watchdog counter Watchdog Watchdog counter
Table 6-4. RegSysWd register
Reset handling capabilities
There reset sources: Power Reset (POR) External reset from NRESET Programmable port input combination Programmable watchdog timer reset Programmable BusError reset processor access outside allocated memory
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Another reset source Sleep RegSysReset register. This source fully controlled software only used during sleep mode. Four internal reset signals generated from these sources distributed through system: nresetcold: asserted NRESET nresetglobal: asserted when nresetcold other enabled reset source active nresetsleep: asserted when circuit sleep mode nresetpconf: asserted when nresetglobal active EnResetPConf RegSysCtrl register set. This reset generally used different ports. allows maintain port configuration unchanged while rest circuit reset. Table shows summary dependency internal reset signals various reset sources. tables describing different registers, reset source indicated. Internal reset signals Asserted reset source NRESET PortA input Watchdog BusError Sleep nresetglobal Asserted Asserted Asserted Asserted Asserted nresetpconf when when EnResetPConf EnRestPConf Asserted Asserted Asserted Asserted Asserted Asserted Asserted nresetsleep Asserted Asserted Asserted nresetcold Asserted Asserted
Table 6-5. Internal reset assertion function reset source.
6.5.1
Reset source description
Power Reset
power reset (POR) monitors external supply voltage. activates reset rising edge this supply voltage. reset inactivated only internal voltage regulator started block performs precise voltage level detection. 6.5.2 NRESET
Applying input state NRESET activate reset. 6.5.3 Programmable Port input combination
Port present product) generate reset signal. description Port further information. 6.5.4 Watchdog reset
Watchdog will generate reset EnResetWD RegSysCtrl register been watchdog cleared time processor. chapter describing watchdog further information.
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6.5.5
BusError reset
address space assigned shown register product. EnBusError RegSysCtrl register software accesses unused address, reset generated.
Sleep mode
Entering sleep mode will reset part circuit. reset used configure circuit correct wake-up after sleep mode. SleepEn RegSysCtrl register been set, sleep mode entered setting Sleep RegSysReset. During sleep mode, nresetsleep signal active. detailed information sleep mode, system documentation.
Control register description operation
registers dedicated reset status control, RegSysReset RegSysCtrl. bits Sleep, SleepFlag SleepEn also located those registers described chapter dedicated different operating modes circuit (system block). RegSysReset register gives information source that generated last reset. read beginning application program detect circuit recovering from error exception condition, circuit starting normally. when ResetBusError forbidden address access generated reset. when ResetWD watchdog generated reset. when ResetfromPortA PortA combination generated reset. Note: reset source either NRESET internal POR. Note: Several bits might not, register cleared between reset occurrences. other bits concern sleep mode control information (see system documentation sleep mode description). When SleepFlag sleep mode active before reset occurred. This will always appear together with ResetfromPortA since other possibilities leave sleep mode (POR NRESET pin) will clear SleepFlag. When Sleep SleepEn sleep mode entered. always reads back RegSysCtrl register enables different available reset sources sleep mode. EnBusError enables reset error condition. EnResetWD enables reset watchdog (can disabled once enabled). EnResetPConf enables reset port configurations when reset Port Error watchdog. SleepEn unlocks Sleep bit. long SleepEn Sleep effect.
Watchdog
watchdog timer, which cleared least every seconds software prevent reset generated timeout condition. watchdog enabled software setting EnResetWD RegSysCtrl register then only disabled power reset setting NRESET state.
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watchdog timer cleared writing consecutively values Hx0A Hx03 RegSysWd register. sequence must strictly respected clear watchdog. assembler code, sequence clear watchdog move AddrRegSysWd, #0x0A move AddrRegSysWd, #0x03 Only writing Hx0A followed Hx03 resets some other write instruction done RegSysWd between writing Hx0A Hx03 values, watchdog timer will cleared. possible read status watchdog RegSysWd register. watchdog counter with count range between system reset generated when counter reaching value
Start-up watchdog specifications
start-up circuit, block generates reset signal during tPOR. circuit starts software execution after this period (see system chapter). intended force circuit into correct state start-up. precise monitoring supply voltage, voltage level detector (VLD) used. Symbol TPOR Vbat_sl WDtime Parameter reset duration Supply ramp Watchdog timeout period Unit V/ms Comments
Table Electrical timing specifications Note: Vbat_sl defines minimum slope required VBAT. Correct start-up circuit guaranteed this slope slow. such case, delay built using NRESET pin. Note: minimal watchdog timeout period guaranteed when internal oscillators used. case external clock source used, watchdog timeout period will correct contents RegSysRCTrim1 RegSysRCTrim2 registers correct (see clock block documentation more details).
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Clock Generation
7.5.1 7.5.2 7.5.3 7.6.1 7.6.2 7.7.1 7.7.2 7.10
FEATURES.7-2 OVERVIEW .7-2 REGISTER .7-2 INTERRUPTS EVENTS .7-3 CLOCK SOURCES .7-5 oscillator Configuration .7-5 oscillator frequency tuning .7-5 oscillator specifications .7-6 XTAL OSCILLATOR .7-7 Xtal configuration .7-7 Xtal oscillator specifications .7-7 EXTERNAL CLOCK .7-8 External clock configuration .7-8 External clock specification .7-8 CLOCK SOURCE SELECTION.7-8 PRESCALERS.7-9 FREQUENCY SELECTOR .7-10
Clock
generation
aout
2003
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Features
available clock sources oscillator, quartz oscillator external clock). divider chains: high-prescaler bits) low-prescaler bits). clock disabling halt mode.
Overview
XE88LCxx chips work different clock sources oscillator, quartz oscillator external clock). clock generator block charge distributing necessary clock frequencies circuit. Figure represents functionality clock block. internal oscillator external clock source selected drive high prescaler. This prescaler generates frequency divisions down 1/256 input frequency. 32kHz clock generated enabling quartz oscillator present product) selecting appropriate high prescaler. prescaler generates clock signals from 32kHz down 1Hz. clock source selected from oscillator, external clock 32kHz clock.
Register
pos. RegSysClock CpuSel EnExtClock BiasRc ColdXtal EnableXtal EnableRc reset nresetsleep nresetcold nresetcold nresetsleep nresetsleep nresetsleep function Select speed cpuck Unused Enable external clock Enable Rcbias (reduces start-up time RC). Xtal start phase Unused Enable Xtal oscillator Enable oscillator
Table 7-1: RegSysClock register pos. RegSysMisc -Output16k OutputCpuCk reset 000000 nresetsleep nresetsleep function Unused Output signal PB[3] Output clock PB[2]
Table 7-2: RegSysMisc register pos. RegSysPre0 -ClearLowPrescal reset 0000000 function Unused Write reset prescaler, always reads
Table 7-3: RegSysPre0 register
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pos.
RegSysRcTrim1 -RcFreqRange RcFreqCoarse[3] RcFreqCoarse[2] RcFreqCoarse[1] RcFreqCoarse[0]
reset nresetcold nresetcold nresetcold nresetcold nresetcold
function Unused Low/high freq. range (low=0) coarse trim coarse trim coarse trim coarse trim
Table 7-4: RegSysRCTrim1 register pos. RegSysRcTrim2 -RcFreqFine[5] RcFreqFine[4] RcFreqFine[3] RcFreqFine[2] RcFreqFine[1] RcFreqFine[0] reset nresetcold nresetcold nresetcold nresetcold nresetcold nresetcold function Unused fine trim fine trim fine trim fine trim fine trim fine trim
Table 7-5: RegSysRCTrim2 register pos. RegSysPtckmode -Reserved reset 0000000 nresetglobal function Unused Reserved
Table 7-6: RegSysPtckmode register
Interrupts events
interrupt source ck128Hz ck1Hz Default mapping interrupt manager RegIrqHig(6) RegIrqMid(3) Table 7-7: Interrupts events Default mapping event manager RegEvn(5) RegEvn(1)
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Clock
ckRCExt
high prescaler
ckRCExt ckRCExt/256
RegSysRcTrim1&2 EnableXtal not(En Clock) ck32kHz
div.
prescaler
ck32kHz ck1Hz cpuck
Xtal
EnableRc Clock system clock
Figure 7-1. Clock block structure
Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
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7.5.1
Clock sources
oscillator Configuration
oscillator always turned selected system operation power-on reset, NRESET, when exiting sleep mode. turned after Xtal (quartz oscillator) been started, after selection external clock entering sleep mode. oscillator frequency ranges: sub-MHz MHz) above-MHz (0.5 MHz). Inside range, frequency tuned software coarse fine adjustment. registers RegSysRcTrim1 RegSysRcTrim2. EnableRc register RegSysClock controls propagation clock signal operation oscillator. user stop oscillator resetting EnableRc. Entering sleep mode disables oscillator. Note: oscillator bias maintained while oscillator disabled setting BiasRc RegSysClock. This allows faster restart oscillator cost increased power consumption (see section 7.5.3). 7.5.2 oscillator frequency tuning
oscillator frequency using bits RegSysRcTrim1 RegSysRcTrim2 registers. Figure shows nominal frequency oscillator function these bits. absolute value frequency given register content change ±35% from chip chip tolerances integrated capacitors resistors. However, modification frequency function modification register content fairly precise. This means that curves Figure shift down that slope remains unchanged. RcFreqRange modifies oscillator frequency factor upper curve figure corresponds RcFreqRange=1. RcFreqCoarse modifies frequency oscillator factor (RcFreqCoarse+1). figure represents frequency different values bits RcFreqCoarse: each value frequency multiplied Incrementing RcFreqFine code, increases frequency about 1.4%. frequency oscillator therefor given with fRcmin oscillator frequency registers
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1E+07
RcFreqRange='1' RcFreqRange='0'
Nominal oscillator frequency [Hz]
1E+06
RcFreqFine(5:0)
1E+05
1E+04 0000 0001 0011 0111 1111
Figure 7-2. oscillator nominal frequency tuning. 7.5.3 oscillator specifications description Lowest frequency fine tuning step startup time Supply voltage dependence Temperature dependence unit %/°C Comments Note BiasRc=0 BiasRc=1 Note Note
fRCmin RcFreqFine RC_su PSRR
Table 7-8. oscillator specifications Note this frequency tolerance when trimming codes frequency start-up about twice high. Note frequency shift function VBAT with normal regulator function. Note frequency shift function VBAT while regulator short-circuited VBAT. tolerances minimal frequency drift with supply temperature cancelled using software hardware DFLL (digital frequency locked loop) which uses crystal oscillator reference frequency.
RcFreqFine(5:0)
RcFreqCoarse(3:0)
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7.6.1
Xtal oscillator
Xtal configuration
Xtal operates with external crystal 32'768 During Xtal oscillator start-up, first 32768 cycles masked. bits EnableXtal ColdXtal register RegSysClock control oscillator. power-on reset, NRESET pulse during sleep mode, EnableXtal reset ColdXtal (Xtal oscillator selected start-up). user start Xtal oscillator setting EnableXtal. When Xtal oscillator starts, ColdXtal reset after 32768 cycles. Before ColdXtal reset system, Xtal frequency precision guaranteed. Xtal oscillator stopped user resetting EnableXtal. When user enters into sleep mode, Xtal stopped. 7.6.2 Xtal oscillator specifications
crystal oscillator been designed crystal with specifications given Table 7-9. oscillator precision only guaranteed this crystal. Symbol Description Resonance frequency nominal frequency Motional resistance Motional capacitance Shunt capacitance Motional resistance overtone (parasitic) Quality factor 32768 400k Unit Comments
Table 7-9. Crystal specifications. safe operation, power consumption meet specified precision, careful board layout required: Keep lines XOUT short insert line between them. Connect crystal package VSS. noisy digital lines near XOUT. Insert guards where needed. Respect board specifications Table 7-10. Symbol Rh_xin Rh_xout Rh_xin_xout Cp_xin Cp_xout Cp_xin_xout Description Resistance XIN-VSS Resistance XOUTVSS Resistance XINXOUT Capacitance XINVSS Capacitance XOUTVSS Capacitance XINXOUT Unit Comments
Table 7-10. Board layout specifications.
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oscillator characteristics given Table 7-11. characteristics valid only crystal board layout meet specifications above. Symbol fXtal St_xtal Fstab Description Nominal frequency Start-up time Frequency deviation 32768 Unit Comments
-100
Note
Table 7-11. Crystal oscillator characteristics. Note This gives relative frequency deviation from nominal crystal with CL=8.2pF within temperature range -40°C 85°C. crystal tolerance, crystal aging crystal temperature drift included this figure.
7.7.1
External clock
External clock configuration
user provide external clock instead internal oscillators. external provided frequency internally divided two. external clock input XIN. system configured external clock EnExtClock register RegSysClock. Using bits registers RegSysRcTrim1 RegSysRcTrim2, ck32kHz clock frequency controlled (see section 7.10). Note: when using external clock, Xtal available. 7.7.2 External clock specification
external clock satisfy specifications table below. Correct behavior circuit guaranteed external clock signal does respect specifications below. Symbol FEXT PW_1 PW_0 FEXT_LV PW_1_LV PW_0_LV Description External clock frequency Pulse width Pulse width External clock frequency Pulse width Pulse width 0.06 0.03 Unit Comments Note Note Note Note Note Note
Table 7-12. External clock specifications. Note VBAT2.4V Note VBAT=VREG=1.2V
Clock source selection
There three possible clock sources available clock. clock always selected after power-up, negative pulse NRESET after Sleep mode. clock selection done with CpuSel RegSysClock fastest clock, from Xtal EnableXtal EnExtClock else from high prescaler output). Switching from clock source another glitch free. D0309-134
Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
next table summarizes different clock configurations circuit: Clock Sources EnExtClock EnableXtal EnableRc Mode name Cpuck High Prescaler Clock input RCNOTE External Prescaler Clock input Xtal High presc. Xtal High presc. Clock targets
CpuSel=0 Xtal RCNOTE RCNOTE External NOTE
CpuSel=1 Xtal High presc. Xtal High presc.
Sleep Xtal Xtal External
Table 7-13: Table clocking modes. Note frequency must higher than when Xtal enabled order ensure proper operation. Note clock divided value freq instruction (see coolrisc instruction information) freq instruction nodiv div2 div4 div8 div16 cpuck external RC/2 external/2 RC/4 external/4 RC/8 external/8 RC/16 external/16
Note Switching from clock source another stopping unused clock source must performed using MOVE instructions RegSysClock. First select clock source then stop unused one.
Prescalers
clock generator block embeds divider chains: high prescaler one. high prescaler made stage dividing chain prescaler stage dividing chain. Features: High prescaler only driven with clock external clock (bits EnableRc EnExtClock have set, Table 7-13). prescaler driven from high prescaler directly with Xtal clock when EnableXtal EnExtClock ClearLowPrescal RegSysPre0 register allows reset synchronously prescaler, prescaler also automatically cleared when EnableXtal set. Both dividing chains reset asynchronously nresetglobal signal. ColdXtal=1 indicates Xtal start phase. active 32768 Xtal cycles after setting EnableXtal.
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7.10 frequency selector
decoder used select from high prescaler, frequency that closest operate prescaler when Xtal running. this case, oscillator frequency ±35% will also valid prescaler frequency outputs. next table shows trimming values RegSysRcTrim1 RegSysRcTrim2 registers select frequency. least significant bits RcFreqFine word used. order ensure correct frequency selection prescaler when having external clock, proper value must trim registers. code selected from table below function frequency ratio between half frequency external clock 32kHz. frequency correctly, timings derived from prescaler will shifted accordingly (e.g. watchdog frequencies) some peripherals longer function correctly deviation from 32kHz large (e.g. voltage level detector).
7-10
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Default case (0'0001'000) From 0'0000'000 0'0000'100 From 0'0000'101 0'0001'100 From 0'0001'101 0'0001'111 0'0010'000 From 0'0010'001 0'0010'110 0'0010'111 From 0'0011'000 0'0011'100 From 0'0011'101 0'0011'111 From 0'0100'000 0'1000'010 From 0'0100'011 0'0100'111 0'0101'000 From 0'0101'001 0'0101'110 0'0101'111 From 0'0110'000 0'0110'101 From 0'0110'110 0'0110'111 From 0'0111'000 0'0111'100 From 0'0111'101 0'0111'111 From 0'1000'000 0'1000'011 From 0'1000'100 0'1000'111 From 0'1001'000 0'1001'010 From 0'1001'011 0'1001'111 From 0'1010'000 0'1010'001 From 0'1010'010 0'1010'111 0'1011'000 From 0'1011'001 0'1011'110 0'1011'111 From 0'1100'000 0'1100'110 0'1100'111 From 0'1101'000 0'1101'101 From 0'1101'110 0'1101'111 From 0'1110'000 0'1110'100 From 0'1110'101 0'1110'111 From 0'1111'000 0'1111'100 From 0'1111'101 0'1111'111 From 1'0000'000 1'0000'010 From 1'0000'011 1'0001'010 From 1'0001'011 1'0010'100 From 1'0010'101 1'0010'111 From 1'0011'000 1'0011'010 From 1'0011'011 1'0011'111 1'0100'000 From 1'0100'001 1'0100'110 1'0100'111 From 1'0101'000 1'0101'100 From 1'0101'101 1'0101'111 From 10110'000 1'0110'011 From 1'0110'100 1'0110'111 From 1'0111'000 1'0111'010 From 1'0111'011 1'0111'111 From 1'1000'000 1'1000'001 From 1'1000'010 1'1000'111 1'1001'000 From 1'1001'001 1'1111'111
Selected high prescaler
Ckrcext/2 Ckrcext Ckrcext/2 Ckrcext/4 Ckrcext/2 Ckrcext/4 Ckrcext/8 Ckrcext/4 Ckrcext/8 Ckrcext/4 Ckrcext/8 Ckrcext/4 Ckrcext/8 Ckrcext/16 Ckrcext/8 Ckrcext/16 Ckrcext/8 Ckrcext/16 Ckrcext/8 Ckrcext/16 Ckrcext/8 Ckrcext/16 Ckrcext/8 Ckrcext/16 Ckrcext/8 Ckrcext/16 Ckrcext/32 Ckrcext/16 Ckrcext/32 Ckrcext/16 Ckrcext/32 Ckrcext/16 Ckrcext/32 Ckrcext/16 Ckrcext/32 Ckrcext/8 Ckrcext/16 Ckrcext/32 Ckrcext/64 Ckrcext/32 Ckrcext/64 Ckrcext/32 Ckrcext/64 Ckrcext/128 Ckrcext/64 Ckrcext/128 Ckrcext/64 Ckrcext/128 Ckrcext/64 Ckrcext/128 Ckrcext/64 Ckrcext/128 Ckrcext/64 Ckrcext/128
Table 7-14: Table 32kHz high prescaler decoder.
7-11
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Interrupt handler
FEATURES .8-2 OVERVIEW .8-2 REGISTER .8-2 DETAILED DESCRIPTION .8-4 INTERRUPT HANDLING SOFTWARE.8-6
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Features
XE8000 chips support interrupt sources, divided into levels priority.
Overview
interrupt handler allows manage interrupt sources individually. interrupt sources divided into levels priority: High interrupt sources), interrupt sources), interrupt sources). Those levels priority directly mapped those supported CoolRisc (IN0, IN2; CoolRisc documentation more information). Additional functions given that allow fast detection highest priority interrupt that been activated.
Register
Register name RegIrqHig RegIrqMid RegIrqLow RegIrqEnHig RegIrqEnMid RegIrqEnLow RegIrqPriority RegIrqIrq Table 8-1: handler registers pos. RegIrqHig RegIrqHig[7] RegIrqHig[6] RegIrqHig[5] RegIrqHig[4] RegIrqHig[3] RegIrqHig[2] RegIrqHig[1] RegIrqHig[0] reset nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal function interrupt (high priority) clear interrupt when written interrupt (high priority) clear interrupt when written interrupt (high priority) clear interrupt when written interrupt (high priority) clear interrupt when written interrupt (high priority) clear interrupt when written interrupt (high priority) clear interrupt when written interrupt (high priority) clear interrupt when written interrupt (high priority) clear interrupt when written
Table 8-2: RegIrqHig
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pos.
RegIrqMid RegIrqMid[7] RegIrqMid[6] RegIrqMid[5] RegIrqMid[4] RegIrqMid[3] RegIrqMid[2] RegIrqMid[1] RegIrqMid[0]
reset nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal
function interrupt (mid priority) clear interrupt when written interrupt (mid priority) clear interrupt when written interrupt (mid priority) clear interrupt when written interrupt (mid priority) clear interrupt when written interrupt (mid priority) clear interrupt when written interrupt (mid priority) clear interrupt when written interrupt (mid priority) clear interrupt when written interrupt (mid priority) clear interrupt when written
Table 8-3: RegIrqMid pos. RegIrqLow RegIrqLow[7] RegIrqLow[6] RegIrqLow[5] RegIrqLow[4] RegIrqLow[3] RegIrqLow[2] RegIrqLow[1] RegIrqLow[0] reset nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal function interrupt (low priority) clear interrupt when written interrupt (low priority) clear interrupt when written interrupt (low priority) clear interrupt when written interrupt (low priority) clear interrupt when written interrupt (low priority) clear interrupt when written interrupt (low priority) clear interrupt when written interrupt (low priority) clear interrupt when written interrupt (low priority) clear interrupt when written
Table 8-4: RegIrqLow pos. RegIrqEnHig RegIrqEnHig[7] RegIrqEnHig[6] RegIrqEnHig[5] RegIrqEnHig[4] RegIrqEnHig[3] RegIrqEnHig[2] RegIrqEnHig[1] RegIrqEnHig[0] reset function enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt
Table 8-5: RegIrqEnHig
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pos.
RegIrqEnMid RegIrqEnMid[7] RegIrqEnMid[6] RegIrqEnMid[5] RegIrqEnMid[4] RegIrqEnMid[3] RegIrqEnMid[2] RegIrqEnMid[1] RegIrqEnMid[0]
reset
function enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt
Table 8-6: RegIrqEnMid pos. RegIrqEnLow RegIrqEnLow[7] RegIrqEnLow[6] RegIrqEnLow[5] RegIrqEnLow[4] RegIrqEnLow[3] RegIrqEnLow[2] RegIrqEnLow[1] RegIrqEnLow[0] reset function enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt enable interrupt
Table 8-7: RegIrqEnLow pos. RegIrqPriority RegIrqPriority reset 11111111 function code highest priority
Table 8-8: RegIrqPriority pos. RegIrqIrq IrqHig IrqMid IrqLow reset 00000 function unused more high priority interrupts more priority interrupts more priority interrupts
Table 8-9: RegIrqIrq
Detailed description
CoolRISC core different interrupt levels IN0, (Figure 8-1). When these interrupts triggered, program counter (PC) loaded with fixed address. case more than interrupt occurs simultaneously, execution order IN0, IN1, IN2. masking, setting clearing these interrupts done stat register (see chapter describing CPU). interrupt handler bundles certain number interrupt sources routes them these three interrupts provides possibility enable/disable each them individually. definition interrupt sources given memory mapping chapter. RegIrqHig, RegIrqMid, RegIrqLow 8-bit registers containing flags interrupt sources. Those flags when interrupt enabled (i.e. corresponding registers RegIrqEnHig, RegIrqEnMid RegIrqEnLow set) rising edge detected corresponding interrupt source.
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Once memorized, interrupt flag cleared writing corresponding RegIrqHig, RegIrqMid RegIrqLow. Writing does modify flag. definitively clear interrupt, clear CoolRISC interrupt CoolRISC stat register. interrupts automatically cleared after reset. registers provided facilitate writing interrupt service software. RegIrqPriority contains number highest priority (its value 0xFF when interrupt memorized). RegIrqIrq indicates priority level currently activated interrupts. interrupt sources sampled highest frequency system. interruption generated memorized when interrupt becomes high. Between rising edge interrupt peripheral rising edge CoolRISC core, there latency clock cycle.
medium priority PC=h0001
stat
high priority PC=h0003
priority PC=h0002
RegIrqLow RegIrqMid
RegIrqHig
RegIrqEnHig
Figure 8-1. Principle interrupt handler.
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Interrupt handling software
This chapter describes example software used interrupt handler. This software present default software development environments. represents only several possible ways handling interrupts. First all, jump addresses defined beginning crt0.s file. case, three interrupt levels jump same place (defined _interrupt label), this changed required.
Reset interrupt vectors _start: jump main_init reset jump _interrupt jump _interrupt jump _interrupt
first thing when interrupt activated save context. have start with saving contents accumulator, then flags finally internal registers. will find this part code IRQComon_xx.s file.
_interrupt: Save registers flags move -(i3), move sflag move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3), move -(i3),
Next step determine which interrupt activated. this case, value RegIrqPriority register determine highest priority interrupt that activated. Other ways used, especially when priority order fixed hardware needs changed. will find this part code IRQComon_xx.s file. this example, labels used defined XE88LC02.
following lines enables adress calculation interrupt table. Where RegIrqPriority addres offset table. RegIrqPriority valid values between 0x00 until 0x017. 0xFF value should never exist. move r0,RegIrqPriority calls _interrupttab save pc+1 _interrupttab: ipl,#0x05 offset, instr. before table addc iph,#0x00 propagate carry ipl,r0 offset regirqpriority addc iph,#0x00 propagate carry
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rets interrupt table jump ret_int jump ret_int jump Irq_Pa2 jump Irq_Pa3 jump Irq_CntD jump Irq_CntB jump Irq_Pa6 jump Irq_Pa7 jump Irq_Pa0 jump Irq_Pa1 jump Irq_Vld jump Irq_1Hz jump Irq_Pa4 jump Irq_Pa5 jump Irq_UsrtCond1 jump Irq_UsrtCond2 jump Irq_UartRx jump Irq_UartTx jump Irq_Cmpd jump Irq_CntC jump Irq_CntA jump Irq_Spi jump Irq_128Hz jump Irq_AC
RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority RegIrqPriority 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F 0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
next steps clear interrupt flag interrupt handler, call specific function identified interrupt source clear interrupt stat register. This code found file IRQSave0_xx.s.
Irq_AC: move RegIrqHig, #0x80 calls Handle_Irq_AC jump ret_int0 Irq_128Hz: move RegIrqHig, #0x40 calls Handle_Irq_128Hz jump ret_int0 Irq_Spi: move RegIrqHig, #0x20 calls Handle_Irq_Spi jump ret_int0 ret_int0: clrb stat, jump ret_int
Finally, context have restored. This code found IRQComon_xx.s file.
ret_int: Restore registers flags move (i3)+ move (i3)+ move (i3)+ move (i3)+ move i2h, (i3)+ move i2l, (i3)+ move i1h, (i3)+
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move i1l, (i3)+ move i0h, (i3)+ move i0l, (i3)+ move iph, (i3)+ move ipl, (i3)+ rflag (i3)+ move (i3)+ reti interrupt handlers
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Event handler
FEATURES .9-2 OVERVIEW .9-2 REGISTER .9-2 DETAILED DESCRIPTION .9-3
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Features
XE8000 chips support event sources, divided into levels priority.
Overview
event different from interrupt that does modify program counter (PC). Events used microcontroller instructions. First all, events useful wake-up microcontroller when HALT. software execution then simply resumes instruction next HALT instruction. second instruction conditional jump event (JEV). jump executed event flags stat register set. other cases, occurrence event effect. event handler allows manage event sources individually. event sources divided into levels priority: High event sources) event sources). Those levels priority directly mapped those supported CoolRisc(EV0and IN1; CoolRiscdocumentation more information). Additional functions given that allow fast detection highest priority event that been activated.
Register
addresses given Table default values different some products. Register name RegEvn RegEvnEn RegEvnPriority RegEvnEvn Table 9-1: handler registers. pos. RegEvn RegEvn[7] RegEvn[6] RegEvn[5] RegEvn[4] RegEvn[3] RegEvn[2] RegEvn[1] RegEvn[0] reset nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal function event (high priority) clear event when written event (high priority) clear event when written event (high priority) clear event when written event (high priority) clear event when written event (low priority) clear event when written event (low priority) clear event when written event (low priority) clear event when written event (low priority) clear event when written
Table 9-2: RegEvn
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pos.
RegEvnEn RegEvnEn[7] RegEvnEn[6] RegEvnEn[5] RegEvnEn[4] RegEvnEn[3] RegEvnEn[2] RegEvnEn[1] RegEvnEn[0]
reset nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal
function enable event enable event enable event enable event enable event enable event enable event enable event
Table 9-3: RegEvnEn pos. RegEvnPriority RegEvnPriority reset 11111111 nresetglobal function code highest event event present.
Table 9-4: RegEvnPriority pos. RegEvnEvn EvnHig EvnLow reset 00000 nresetglobal nresetglobal function unused more high priority event more priority event
Table 9-5: RegEvnEvn
Detailed description
CoolRISC core different event levels (Figure 9-1). setting clearing these events done stat register (see chapter describing CPU). event handler bundles certain number event sources routes them these events provides possibility enable/disable each them individually. definition event sources given memory mapping chapter. RegEvn 8-bit register containing flags event sources. Those flags when event enabled (i.e. corresponding registers RegEvnEn set) rising edge detected corresponding event source. Once memorized, writing corresponding RegEvn clears event flag. Writing does modify flag. interrupts automatically cleared after reset. registers provided facilitate writing interrupt service software. RegEvnPriority contains number highest event (its value 0xFF when event memorized). RegEvnEvn indicates priority level current interrupts. event sources sampled highest frequency system. event generated memorized when event becomes high. event sources divided into levels priority: High event sources) event sources). Those levels priority directly mapped those supported CoolRisc (EV0 EV1; CoolRisc documentation more information).
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stat
RegEvn
RegEvnEn
Figure 9-1. Event handler principle.
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event sources
Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
power
10.1 10.1.1 10.2
FEATURES .10-2 Overview .10-2 REGISTER .10-2
10-1
power data register avril 2000
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10.1 Features
10.1.1
Overview
order save power consumption, 8-bit registers provided page These memory locations should reserved often-updated variables. they real registers RAM, power consumption greatly reduced.
10.2 Register
pos. Reg00 Reg00 Reg01 Reg02 Reg03 Reg04 Reg05 Reg06 Reg07 reset function low-power data memory low-power data memory low-power data memory low-power data memory low-power data memory low-power data memory low-power data memory low-power data memory
Table 10-1: Power
10-2
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Port
11.1 11.2 11.3 11.4 11.5 11.6
FEATURES .11-2 OVERVIEW.11-2 REGISTER .11-3 INTERRUPTS EVENTS MAP.11-4 PORT (PA) OPERATION .11-4 PORT ELECTRICAL SPECIFICATION .11-6
11-1
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11.1 Features
input port, bits wide each individually debounced direct input each individually pullup snap-to-rail option each input each interrupt request source rising falling edge system reset generated input pattern PA[0] PA[1] generate events CPU, individually maskable PA[0] PA[3] used clock inputs counters/timers/PWM (product dependent)
11.2 Overview
PortA general purpose wide digital input port, with interrupt capability. Figure 11-1 shows structure.
VBat
Port
logic debounce RegPASnapToRail RegPAPullup RegPADebounce DebFast (RegPACtrl(0)) RegPACtrl RegPAIn RegPAEdge interrupts events cntclocks 1kHz 32kHz RegPARes1 RegPARes0
resetfromporta
Figure 11-1: structure Port
11-2
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11.3 Register
There eight registers Port (PA), namely RegPAIn, RegPADebounce, RegPAPullup, RegPAEdge, RegPARes0, RegPARes1, RegPACtrl RegPASnaptorail. Table 11-2 Table 11-9 show mapping control bits functionality these registers register name RegPAIn RegPADebounce RegPAEdge RegPAPullup RegPARes0 RegPARes1 RegPACtrl RegPASnaptorail Table 11-1: registers
pos. RegPAIn PAIn[7:0] reset description PA[7] PA[0] input value
Table 11-2: RegPAIn
pos. RegPADebounce PADebounce[7:0] reset nresetpconf description PA[7] PA[0] debounce enabled debounce disabled
Table 11-3: RegPADebounce
pos. RegPAEdge PAEdge[7:0] reset nresetglobal description PA[7] PA[0] edge configuration positive edge negative edge
Table 11-4: RegPAEdge
pos. RegPAPullup PAPullup[7:0] reset nresetpconf description PA[7] PA[0] pullup enable pullup disabled pullup enabled
Table 11-5: RegPAPullup
pos. RegPARes0 PARes0[7:0] reset nresetglobal description PA[7] PA[0] reset configuration
Table 11-6: RegPARes0
pos. RegPARes1 PARes1[7:0] reset nresetglobal description PA[7] PA[0] reset configuration
Table 11-7: RegPARes
11-3
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pos.
RegPACtrl [7:1] DebFast
reset 0000000 nresetpconf
description Unused slow debounce, fastdebounce
Table 11-8: RegPACtrl
pos. RegPASnaptorail PASnaptorail[7:0] reset nresetpconf description snap-to-rail input
Table 11-9: RegPASnaptorail Note: Depending status EnResetPConf RegSysCtrl, RegPAEdge, RegPADebounce RegPACtrl reset possible system resets only with power-on reset NRESET pad.
11.4 Interrupts events
Interrupt source pa_irqbus[5] pa_irqbus[4] pa_irqbus[1] pa_irqbus[0] pa_irqbus[7] pa_irqbus[6] pa_irqbus[3] pa_irqbus[2] Default mapping interrupt manager RegIrqMid[5] RegIrqMid[4] RegIrqMid[1] RegIrqMid[0] RegIrqLow[7] RegIrqLow[6] RegIrqLow[3] RegIrqLow[2] Default mapping event manager
RegEvn[4] RegEvn[0]
11.5 Port (PA) Operation
Port input status (debounced not) read from RegPAin. Debounce mode: Each Port individually debounced setting corresponding RegPADebounce. After reset, debounce function disabled. After enabling debouncer, change input value accepted only height consecutive samples identical. Selection clock done DebFast Register RegPACtrl.
DebFast Clock filter 1kHz 32kHz
Table debounce frequency selection Note: tolerance debounce frequency depends selected clock source. When external clock used, pulse width will correct input prescaler frequency close 32kHz (see clock block documentation). Pullups/Snap-to-rail: Different functions possible depending value registers RegPAPullup RegPASnaptorail. When corresponding RegPAPullup inputs floating (pullup pulldown resistors disconnected). When corresponding RegPAPullup RegPASnaptorail pullup resistor connected input pin. Finally, when
11-4
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corresponding RegPAPullup RegPASnaptorail snap-to-rail function active. snap-to-rail function connects pullup pulldown resistor input depending value forced input pin. This function used instance when input port connected tristate bus. When floating, pullup pulldown maintains last impedance state before became floating until another impedance output drives bus. also reduces power consumption with respect classic pullup since selects pullup pulldown resistor that confirms detected input state. state input summarized table below.
PAPullup[x] PASnaptorail[x] (last) externally forced PA[x] value PA[x] pull floating pullup pulldown pullup
Table Snap-to-rail Port starts with pullup resistor connected snap-to-rail function disabled. Port interrupt source: Each Port input interrupt request source rising falling edge with corresponding RegPAEdge. After reset, rising edge selected interrupt generation default. interrupt source debounced setting register RegPADebounce. interrupt signals sampled fastest clock circuit. order guarantee that circuit detects interrupt, minimal pulse length should cycle this clock. Note: care must taken when modifying RegPAEdge because this register performs edge selection. change this register result transition, which interpreted valid interruption. Port event source: interrupt signals pins PA[0] PA[1] also available events event controller. Port clock source (product dependent): Images PA[0] PA[3] input ports (debounced not) available clock sources counter/timer/PWM peripheral. Port reset source: Port used generate system reset placing predetermined word Port externally. reset built using logical PARes[x] signals: resetfromportA PAReset[7] PAReset[6] PAReset[5] PAReset[0] PAReset[x] itself logical function corresponding PA[x]. four logical functions selected each writing into registers RegPARes0 RegPARes1 shown Table 11-12.
PARes1[x] PARes0[x] PAReset[x] PA[x] not(PA[x])
Table 11-12: Selection bits reset signal
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reset from Port inhibited placing both PARes1[x] PARes0[x] least pin. Setting both PARes1[x] PARes0[x] makes reset independent value corresponding pin. Setting both registers hFF, will reset circuit independent from Port input value. This makes possible reset software. Note: depending value PA[0] PA[7], changes RegPARes0 RegPARes1 cause reset. Therefore safe have always (RegPARes0[x], RegPARes1[x]) equal `00' during setting operations.
11.6 Port electrical specification
VINH VINL description Input high voltage Input voltage Pull-up resistance Input capacitance 0.7*VBAT VBAT 0.2*VBAT unit Comments VBAT2.4V VBAT2.4V Note
Note this value indicative only since depends package. Table 11-13. Electrical specification
11-6
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Port
12.1 12.2 12.3 12.4 12.5 12.5.1 12.5.2 12.6 12.7 12.7.1 12.7.2 12.8
FEATURES .12-2 OVERVIEW .12-2 REGISTER MAP.12-2 PORT CAPABILITIES .12-3 PORT ANALOG CAPABILITY .12-4 Port analog configuration .12-4 Port analog function specification .12-5 PORT FUNCTION CAPABILITY .12-5 PORT DIGITAL CAPABILITIES .12-6 Port digital configuration.12-6 Port digital function specification.12-7 POWER COMPARATORS .12-7
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12.1 Features
Input output analog port, bits wide Each individually input output Each individually open-drain push-pull Each individually pull-up (for input open-drain mode) open-drain mode, pull-up active when corresponding zero pads connected individually four internal analog lines line analog bus) internal freq. cpuck) output PB[2] PB[3]
Product dependant: signal output pads PB[0] PB[1] synchronous serial interface (USRT) uses pads PB[5], PB[4] UART interface uses pads PB[6] PB[7]
12.2 Overview
Port multi-purpose Input/output port. addition digital behavior, pins used analog signals. Each port terminal individually selected digital input output analog sharing four possible analog lines.
12.3 Register
Table 12-1 shows Port registers. register name RegPBOut RegPBIn RegPBDir RegPBOpen RegPBPullup RegPBAna Table 12-1: Port registers
12-2
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pos.
RegPBOut
PBOut[7-0]
reset
nresetpconf
description digital mode
PB[7-0] output value
description analog mode
Analog selection PB[7-0]
Table 12-2: RegPBOut
pos.
RegPBIn
PBIn[7-0]
reset
description digital mode
PB[7-0] input status
description analog mode
Unused
Table 12-3: RegPBIn
pos.
RegPBDir
PBDir [7-0]
reset
nresetpconf
description digital mode
PB[7-0] direction (0=input)
description analog mode
Analog selection PB[7-0]
Table 12-4: RegPBDir
pos.
RegPBOpen
PBOpen[7-0]
reset
nresetpconf
description digital mode
PB[7-0] open drain open drain)
description analog mode
Unused
Table 12-5: RegPBOpen
pos.
RegPBPullup
PBPullup[7]
reset
nresetpconf
description digital mode
Pull-up PB[7-0] (1=active)
description analog mode
Connect PB[7-0] selected
Table 12-6: RegPBPullup
pos.
RegPBAna
PBAna [7-0]
reset
nresetpconf
description digital mode
PB[7-0] analog mode
description analog mode
PB[7-0] analog mode
Table 12-7: RegPBAna
Note: Depending status EnResPConf RegSysCtrl, reset conditions registers different. reset block documentation more details nresetpconf signal.
12.4 Port capabilities
Port name PB[7] PB[6] PB[5] PB[4] PB[3] PB[2] PB[1] PB[0] high (analog) analog analog analog analog analog analog analog analog utilization (priority) medium (functions) uart uart usrt usrt clock PWM1 Counter (C+D) PWM0 Counter (A+B) (digital) (default) (with pull-up) (with pull-up) (with pull-up) (with pull-up) (with pull-up) (with pull-up) (with pull-up) (with pull-up)
Table 12-8: Different Port functions
12-3
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Table 12-8 shows different usages that made port with order priority. selected analog, overwrites function digital set-up. selected analog, function enabled, overwrites digital set-up. neither analog function selected pin, used ordinary digital I/O. This default configuration start-up. Note: presence functions product dependent.
12.5 Port analog capability
12.5.1 Port analog configuration
Port terminals attached line analog setting PBAna[x] bits RegPBAna register. other registers then define connection these analog lines different pads Port These used implement simple driver converter. Analog switching available only when circuit powered with sufficient voltage (see specification below). Below specified supply voltage, only voltages that close VBAT switched. When PBAna[x] Port terminals changed from digital mode analog. usage registers RegPBPullup, RegPBOut RegPBDir define analog configuration (see Table 12-9). When PBAna[x] then PBPullup[x] connects analog bus. PBDir[x] PBPOut[x] select which analog lines used. analog selection PBDir[x] PBout[x] PBPullup[x] PB[x] selection analog line analog line analog line analog line High impedance
Table 12-9: Selection analog lines with RegPBDir, RegPBout RegPBPullup when PBAna[x] Example: pads PB[2] PB[5] analog line (the values depend configuration others pads) apply high impedance analog mode (move RegPBPullup,#0bXX0XX0XX) analog mode (move RegPBAna,#0bXX1XX1XX) select analog line3 (move RegPBDir,#0bXX1XX1XX move RegPBOut,#0bXX1XX1XX) apply analog line output (move RegPBPullup,#0bXX1XX1XX)
12-4
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12.5.2
Port analog function specification
table below defines on-resistance switches between analog different conditions. series resistance between pins Port connected same analog line twice resistance given table. description switch resistance switch resistance input capacitance (off) input capacitance (on) unit Comments Note Note Note Note
Table 12-10. Analog input specifications. Note This series resistance between analog line cases VBAT 2.4V VMULT peripheral present circuit enabled. VBAT 3.0V VMULT peripheral present circuit. Note This series resistance case VBAT 2.8V peripheral VMULT present circuit. Note This input capacitance seen when connected analog line. This value indicative only since product package dependent. Note This input capacitance seen when connected analog line other connected same analog line. This value indicative only since product package dependent.
12.6 Port function capability
Port used different functions implemented other peripherals. description below applicable only circuit contains these peripherals. When counters used implement function (see documentation counters), PB[0] PB[1] terminals used outputs (PB[0] used CntPWM0 RegCntConfig1 PB[1] used CntPWM1 RegCntConfig1 generated values override values written RegPBout. However, PBDir(0) PBDir(1) automatically overwritten have Output16k RegSysMisc, frequency output PB[3]. This overrides value contained PBOut(3). However, PBDir(3) must frequency duty cycle clock signal given Figure 12-1. fmax frequency fastest clock present circuit.
1/fmax 1/16k
Figure 12-1. output clock timing
Similarly, OutputCkCpu RegSysMisc, frequency output PB[2]. This overrides value contained PBOut(2). However, PBDir(2) must
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1/f1 1/f2
Figure 12-2. output clock timing. timing clock (Figure 12-2) depends selection CpuSel RegSysClock register given Table 12-11. fmax frequency fastest clock present circuit. Note that tolerance depends selected clock source (see clock block documentation). CpuSel fmax/4 fmax fmax
Table 12-11. clock timing parameters.
Pins PB[5] PB[4] used USRT (see USRT documentation) when UsrtEnable RegUsrtCtrl. PB[5] PB[4] then become open-drain. This overrides values contained PBOpen(5:4), PBOut(5:4) PBDir(5:4). there external pull-up resistor these pins, internal pull-ups should selected setting PBPullup(5:4). When output, PB[4] takes value UsrtS0 RegUsrtS0. When output, PB[5] takes value UsrtS1 RegUsrtS1. Pins PB[6] PB[7] used UART (see UART documentation). When UartEnTx RegUartCtrl PB[6] used output signal When UartEnRx RegUartCtrl PB[7] used input signal This overrides values contained PBOut(7:6) PBDir(7:6).
12.7 Port digital capabilities
12.7.1 Port digital configuration
direction each within Port (input only input/output) individually using RegPBDir register. PBDir[x] both input output buffer active corresponding Port PBDir[x] corresponding Port input only output buffer high impedance. After reset (nresetpconf) Port input only mode (PBDir[x] reset input values Port available RegPBIn (read only). Reading always direct there debounce function Port case possible noise input signals, software debouncer with polling external hardware filter have realized. input buffer also active when port defined output effective value read back. Data stored RegPBOut outputted Port PBDir[x] default values after reset (0). When output mode (PBDir[x] output conventional CMOS (PushPull) N-channel Open-drain, driving output only low. default, after reset (nresetpconf) PBOpen[x] RegPBOpen cleared (push-pull). PBOpen[x] RegPBOpen then internal transistor output buffer electrically removed output only driven (PBOut[x]=0). When PBOut[x]=1, high Impedance. internal pull-up external pull-up resistor used drive high. Note: Because transistor actually exists (this real Open-drain output) pull-up range limited 0.2V (avoid forward bias transistor diode).
12-6
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Each individually pull-up using register RegPBPullup. Input pulled when corresponding this register Default status after (nresetpconf) which means with pull limit power consumption, pull-up resistors only enabled when associated either digital input N-channel open-drain output with other cases (pushpull output open-drain output driven low), pull resistors disabled independent value RegPBPullup. After power-on reset, Port configured input port with pull-up. During power-on reset (see reset block documentation) however, PB[1] pulled down stead pulled Once power-on reset completed, PB[1] pulled exactly other Port pins. input buffer always active, except analog mode. This means that Port input should valid digital value times unless analog mode. Violating this rule lead high power consumption. 12.7.2 VINH VINL Port digital function specification description Input high voltage Input voltage Output high voltage Output voltage 0.7*VBAT VBAT-0.4 VBAT 0.2*VBAT VBAT VSS+0.4 unit Comments VBAT2.4V VBAT2.4V VBAT=1.2V, =0.3mA VBAT=2.4V, =5.0mA VBAT=4.5V, =8.0mA VBAT=1.2V, =0.3mA VBAT=2.4V, =12.0mA VBAT=4.5V, =15.0mA Note
Pull-up resistance Input capacitance
Note this value indicative only since depends package.
12.8 power comparators
power comparator (CMPD) peripheral present circuit, signals pins PB[7:4] used inputs these power comparators. Although comparators functional independent Port configuration, recommended pins that used CMPD analog mode without selecting analog lines. This avoid high power consumption digital input buffer when analog slowly varying digital signals applied.
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Port
13.1 13.2 13.3 13.4 13.5
Features Overview Register Port (PD) Operation Port electrical specification
13-2 13-2 13-2 13-4 13-5
13-1
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13.1 Features
input output port, bits wide each individually input output pull-ups available input mode snap-to-rail option input mode
13.2 Overview
Port (PD) general purpose input/output digital port. Figure 13-1 shows structure.
VBat
logic
RegPDPullup[7:4] RegPDPullup[3:0]
RegPDIn
RegPDOut
RegPDDir
Figure 13-1 structure PortD
13.3 Register
There four registers Port (PD), namely RegPDIn, RegPDOut, RegPDDir RegPDPullup. Table 13-3 Table 13-6 show mapping control bits functionality these registers. register name RegPDIn RegPDOut RegPDDir RegPDPullup Table 13-1 registers
13-2
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Pos.
RegPDIn PDIn[7:0]
Reset
Description PD[7:0] input value
Table 13-2 RegPDIn
Pos. RegPDOut PDOut[7:0] Reset nresetpconf Description PD[7:0] output value
Table 13-3 RegPDOut
Pos. RegPDDir PDDir[7:0] Reset nresetpconf Description PD[7:0] direction (0=input)
Table 13-4 RegPDDir
Pos. RegPDPullup PDSnapToRail[3] PDSnapToRail[2] PDSnapToRail[1] PDSnapToRail[0] PDPullup[3] PDPullup[2] PDPullup[1] PDPullup[0] Reset nresetpconf nresetpconf nresetpconf nresetpconf nresetpconf nresetpconf nresetpconf nresetpconf Description snap-to-rail PD[7] PD[6] (1=active) snap-to-rail PD[5] PD[4] (1=active) snap-to-rail PD[3] PD[2] (1=active) snap-to-rail PD[1] PD[0] (1=active) pullup PD[7] PD[6] (1=active) pullup PD[5] PD[4] (1=active) pullup PD[3] PD[2] (1=active) pullup PD[1] PD[0] (1=active)
Table 13-5 RegPDPullup
13-3
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
13.4 Port (PD) Operation
direction each Port (input input/output) individually using RegPDDir register. PDDir[x] output buffer corresponding Port enabled. After reset, Port input only mode (PDDir[x] reset input buffer always enabled independently from RegPDDir contents. Output data: Data stored RegPDOut prior output Port Input data: status Port available RegPDIn (read only). Reading always direct there digital debounce function associated with Port case possible noise input signals, software debouncer external filter must realised. Pull-up/Snap Rail: When configured input (PDDir[x]=0), pull-ups available every pin. pull-up function pins controlled PDPullup PDSnapToRail bits register RegPDPullup. When PDPullup[x] pull-ups pins PD[2x] PD[2x+1] disabled. When PDPullup[x] PDSnapToRail[x] pull-up resistor connected pins PD[2x] PD[2x+1]. When both PDPullup[x] PDSnapToRail[x] snap-to-rail function active pins PD[2x] PD[2x+1]. snap-to-rail function connects pullup pulldown resistor input depending value forced input pin. This function used instance when input port connected tristate bus. When floating, pullup pulldown maintains last impedance state before became floating until another impedance output driving bus. also reduces power consumption with respect classic pullup since selects pullup pulldown resistor that confirms detected input state. function summarised table below function different register settings.
PDDir[2x(+1)] PDPullup[x] PDSnapToRail[x] (last) externally forced PD[2x(+1)] value PD[2x(+1)] pull resistor connected connected pullup pulldown pullup
Table 13-6: Snap-to-rail pullup function power-on reset, Port configured input port with pull-ups active.
13-4
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
13.5 Port electrical specification
VINH VINL description Input high voltage Input voltage Output high voltage Output voltage 0.7*VBAT VBAT-0.4 VBAT 0.2*VBAT VBAT VSS+0.4 unit Comments VBAT2.4V VBAT2.4V VBAT=1.2V, =0.3mA VBAT=2.4V, =5.0mA VBAT=4.5V, =8.0mA VBAT=1.2V, =0.3mA VBAT=2.4V, =12.0mA VBAT=4.5V, =15.0mA Note
Pull-up resistance Input capacitance
Note this value indicative only since depends package. Table 13-7. Port electrical specification
13-5
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
Universal Asynchronous Receiver/Transmitter (UART)
14.1 14.2 14.3 14.4 14.5 14.6 14.7 14.8 14.8.1 14.8.2 14.8.3 14.8.4 14.9
FEATURES .14-2 OVERVIEW .14-2 REGISTERS .14-2 INTERRUPTS .14-3 UART BAUD RATE SELECTION .14-3 UART OSCILLATOR EXTERNAL CLOCK SOURCE .14-4 UART CRYSTAL OSCILLATOR .14-4 FUNCTION DESCRIPTION .14-5 Configuration bits .14-5 Transmission.14-5 Reception .14-6 Interrupt polling .14-7 SOFTWARE HINTS .14-7
14-1 Universal Asynchronous Receiver/Transmitter novembre 2000
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Datasheet XE88LC02 Sensing Machine Data Acquisition with Zooming driver
14.1 Features
Full duplex operation with buffered receiver transmitter. Internal baudrate generator with programmable baudrates (300 153600). bits word length. Even, odd, no-parity generation detection stop Error receive detection: Start, Parity, Frame Overrun Receiver echo mode interrupts (receive full transmit empty) Enable receive and/or transmit Invert and/or
14.2 Overview
Uart pins PB[7], which used receive PB[6] transmit.
14.3 Registers
register name RegUartCtrl RegUartCmd RegUartTx RegUartTxSta RegUartRx RegUartRxSta Table 14-1: Uart registers pos. RegUartCmd SelXtal UartRcSel(2:0) UartPM UartPE UartWL reset nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal description Select input clock: RC/external, xtal Unused prescaler selection Select parity mode: odd, even Enable parity: with parity, parity Select word length: bits, bits
Table 14-2: RegUartCmd pos. RegUartCtrl UartEcho UartEnRx UartEnTx UartXRx UartXTx UartBR(2:0) reset nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal nresetglobal description Enable echo mode: echo Rx->Tx, echo Enable uart reception Enable uart transmission Invert Invert Select baud rate
Table 14-3: RegUartCtrl
14-2
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