MAX194 Evaluation System/Evaluation MAX194 Evaluation System (MAX

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19-0349; 3/95
MAX194 Evaluation System/Evaluation
MAX194 Evaluation System (MAX194EVC16-DIP) includes MAX194 evaluation Maxim's 68HC16 module. Evaluation software supplied with demonstrates MAX194 MAX195) with Motorola's high-speed QSPI serial interface. Complete source code included. system requires with serial port 1/4" disk drive. stand-alone MAX194 Evaluation (MAX194 EVKIT-DIP) assembled tested board that embodies standard application circuit. Separate power, digital, analog ground planes minimize noise. Jumpers allow several operating modes. board generates interface timing signals, connected user-provided serial interface.
_Features
Proven Board Layout Complete Source Code Provided Shutdown-Mode Evaluation High-Speed Serial Interface Convenient Test Points Provided On-Board Operates from Single Power Supply Evaluates Both 14-Bit MAX194 16-Bit MAX195
Evaluates: MAX194/MAX195
_Ordering Information
PART MAX194EVC16-DIP MAX194EVKIT-DIP 68HC16MODULE TEMP. RANGE +70°C +70°C +70°C BOARD TYPE Through-Hole Through-Hole Through-Hole
System
68HC16 MODULE Note: board labeled MAX195 both MAX194 MAX195 kit.
Maxim Integrated Products
MAX194/MAX195 BOARD
Call toll free 1-800-998-8800 free samples literature.
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
System Component List
QUANTITY DESCRIPTION MAX194 Evaluation (MAX194EVKIT-DIP) 68HC16 Module (68HC16MODULE)
_MAX194 System Quick Start
This section applies only MAX194 with 68HC16 module. Copy files from distribution disk your hard disk. Store MAX194 software directory. Carefully align 40-pin header MAX194 with 40-pin connector module. Gently press them together. boards should flush against each other. Note: MAX194 supported 80C32 module. Make sure jumpers configured accordance with Table Connect power source module, using small screwdriver. terminal block located next on/off switch, upper right corner module. Plus minus marked board. Connect cable from computer's serial port module. using 9-pin serial port, straight-through 9-pin female-to-male cable.
available serial port uses 25-pin connector, standard 25-pin 9-pin adapter. start MAX194 software current directory match directory where Maxim software stored, then type program name "MAX194". program will which serial port connected module. Press space until correct port highlighted, then press ENTER. MAX194 program will switch terminal-emulation mode. this point, apply power 68HC16 module. should light, within seconds program will display logon banner. Note that status indicator, power light. flashes indicate module readiness. download resident code module, press ALT+L (that hold down strike key). program prompts file name. Press ENTER download file KIT194.S19 68HC16 module. KIT194.S19 resident program offers menu commands listed Table evaluate MAX195, replace with MAX195.
Table Jumper Configuration when Used with 68HC16 Module
JUMPER STATE Closed QSPI QSPI QSPI Open FUNCTION Ground SCLK Conversion clock comes from QSPI clock Chip-select driven QSPI PCS0 Conversion start driven QSPI PCS0 Open Normal Operation. Closed Reset; close this jumper when using module, because drives reset pin. 68HC16 module selects bipolar/ unipolar/shutdown modes
Table List Commands Available KIT194.S19
COMMAND FUNCTION List available commands. Read MAX194. Perform continuous conversions. Oscilloscope demonstration-observe system timing relationships operating MAX194 full speed without processing data. Reset MAX194. Select bipolar mode. Select unipolar mode. Select hexadecimal output. Select decimal output. Toggle low-power mode on/off. power-up delay sleep time. Collect fixed number samples.
AUTO
MAX194 Evaluation System/Evaluation
Stand-Alone _Component List
DESIGNATION C19, C20, C23-C26, C8-C11, C13-C16, C12, C18, C17, C171 JU1, JU3, JU4, R10, R11, R13, DESCRIPTION 0.1µF ceramic capacitors ceramic capacitor 15µF, low-ESR capacitors Sanyo OS-CON 20SA14 10µF, tantalum capacitors 100µF, electrolytic capacitors 0.01µF ceramic capacitors 47µF low-ESR capacitor Sanyo OS-CON 6SA47M 1N5819 Schottky diodes 2x20 female data connector 10-pin header 2-pin headers 3-way headers 3-pin headers resistors 680, resistors resistors 47k, resistors resistors 10k, resistor 10M, resistor Maxim MAX194 Maxim MAX874 79L05 negative linear regulator Optional crystal oscillator Maxim MAX400 78L05 positive linear regulator ICL7662 inverter CONT Open
Stand-Alone MAX194 Quick Start
This section applies only MAX194 itself, without module. Make sure jumpers configured accordance with Table Connect oscilloscope's channel probe test point header channel probe DOUT test point. Ground scope probes DGND test point power pad. Trigger positive edge channel time base division, vertical gain division. Apply +12V terminals labeled +12V GROUND. board draws less than 30mA supply current. Momentarily close reset MAX194 kit. Leave open normal operation. Apply signal source between terminals labeled INPUT+ INPUT-. conversion codes observed oscilloscope's channel appropriate data sheet timing information.
Evaluates: MAX194/MAX195
Table Jumper Configuration StandAlone MAX194
JUMPER STATE Closed FUNCTION Ground SCLK Conversion clock comes from crystal oscillator module GND, enabling data output DOUT CONV EOC, continuous-conversion mode Open Normal Operation Closed Reset Select unipolar mode
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
_Detailed Description Software
EPROM Resident Program
small bootstrap program stored EPROM located 68HC16 board. EPROM resident program initializes 68HC16, tests static RAM, configures chip-select logic, establishes serial communications with host, downloads program KIT194 into RAM. starts operating power-up whenever RESET button pressed. After RESET, tests RAM, then waits receive serial character serial port before transmitting identification banner. name already exists, file will erased. close file, press ALT+C. file will contain complete text terminal session from time file opened until closed.
Using QSPI Read MAX194
68HC16 module uses Queued Serial Peripheral Interface (QSPI) master mode read MAX194. MAX194 software uses algorithm described below. Refer example program Listing which assigns QSPI entries programmable chip-select PCS0 MAX194. Note: This interface scheme requires that QSPI clock active during MAX194 reset (see Reset Calibration Procedure section). Initialize QSPI parameters follows:
PARAMETER SPBR CPOL CPHA VALUE EXPLANATION 1.68MHz serial clock Serial clock when idle CPOL CPHA, data valid falling clock edge bits QSPI transfer. consecutive QSPI transfers read MAX194. Delay 119ns between first clock first QSPI transfer satisfy MAX194 tDA. Control first QSPI transfer: CONT BITSE DSCK PSC0 Control second QSPI transfer: CONT BITSE DSCK PSC0 Index first queue entry execute Index last valid queue entry
Resident Program
KIT194.S19 68HC16 RAM-resident program that transferred from disk static 68HC16 module. When KIT194 program running, offers commands listed Table
Personal Computer Program
MAX194.EXE, which runs IBM-compatible computer, terminal program that establishes communication with 68HC16 module allows user download Maxim-provided resident program. serial communication baud rate initiated 1200 baud (default setting) ensure proper operation with basic systems. MAX194.EXE program provides several commands that associated with host computer. These commands listed Table MAX194.EXE program store text terminal session file. begin recording terminal session, press ALT+O [the letter program will file name. Press ENTER accept default file name, type different name. file with that
BITS
DSCKL
COMD.0
COMD.1
Table Commands Available MAX194.EXE Terminal Program
ALT+L ALT+X ALT+P ALT+R ALT+O ALT+C ALT+B ALT+1 ALT+4 ALT+9 ALT+2 Exit DOS. Change port (COM1, COM2). Send RESET command 68HC16. Open file. Close file. Display baud rate menu. 1200 baud 4800 baud 9600 baud 19200 baud COMMAND Load resident code 68HC16.
NEWQP ENDQP
Verify that before starting conversion. Start QSPI transfer. Wait until QSPI transfer complete. perform other tasks while waiting. Extract significant bits from QSPI RAM. Bits B13-B06 located QSPI receive entry bits 7-0, bits B05-B00 located entry bits 9-4. bits sub-LSB bits MAX194 (see Table
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Listing Sample Code 68HC16 Interface
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Using Bit-Pushing Read MAX194
MAX194 interfaced using bit-pushing algorithm, such following: Verify that before starting conversion. Assert CONV begin conversion. Wait until becomes high. Conversion begun. CONV high. Wait until becomes low. Conversion complete. Assert SCLK low. Assert low. Clear 16-bit result register. Repeat times: 9-1. SCLK high. 9-2. Rotate 16-bit result register left. 9-3. Read DOUT into least significant result register. 9-4. Assert SCLK low. high.
_Detailed Description Hardware
Jumper Options
Several jumper blocks allow different configurations MAX194. Jumper functions listed Table Voltage Reference Measuring Supply Current sections.
Table Jumper Settings
JUMPER Open "OSC" "EXT" "QSPI" "QSPI" "GND" "QSPI" "CONT" Open Closed "SHDN" "AUTO" "UNI" Open POSITION Closed FUNCTION Ground SCLK pin. Allows SCLK driven user. Conversion clock driven crystal oscillator Conversion clock driven EXTCLK input pad. Conversion clock driven QSPI serial clock. Connects QSPI chip-select PCS0. Connects ground; data output always enabled. Connects CONV QSPI chip-select PCS0. Connects CONV continuous conversion mode. Normal operating mode. Momentary closure resets re-calibrates MAX194. close this jumper module connected. Select shutdown mode. Lets 68HC16 drive BP/UP/SHDN pin. connected, bipolar input mode selected. Select unipolar mode. Select bipolar mode.
Reset Calibration Procedure
When MAX194 installed environment with unregulated temperature, thermal variation cause offset errors. Transients power supply reference during power-on calibration also source offset error. These errors eliminated performing re-calibration, outlined below: Assert MAX194 RESET low. conversion clock until becomes high. MAX194 RESET high. conversion clock until becomes low. best accuracy, typical application circuit should allow time power supply ambient temperature settle before re-calibrating MAX194. Refer Calibration section MAX194 data sheet.
Data Connector Interface
68HC16 module MAX194 communicate through QSPI port 40-pin data connector. Table lists function each pin.
Table QSPI Receive Format MAX194
ADDR
MAX194 Evaluation System/Evaluation
Analog Input Buffer
analog input MAX194 buffered MAX400 used because drift. feedback circuit consists four passive components: R41, R61, C171, R51. isolates op-amp's output from dynamic capacitive load input. makes network accurate reference input (without R61, reference voltage would appear output amp). C171 compensates high-frequency response making dominate high frequencies. Input offset improved adding 1000pF 0.01µF ceramic capacitor site C28. making dominate high frequencies. reference buffer draws power through lowpass filter formed C18. filter provides necessary power-supply rejection. powered unregulated input supply ensure enough headroom buffer 4.096V reference.
Evaluates: MAX194/MAX195
Layout, Power Supplies, Grounding
Good board layout necessary achieve specified performance, analog ground plane essential optimum performance. board layout artist must provided with explicit instructions, preferably pencil sketch placement sensitive analog components routing ground connections. board layout example. following guidelines: schematic level, keep analog power supplies grounds separate from other power supplies grounds. Digital power connected analog power through series resistor attenuate digital noise. Cluster MAX194, voltage reference, input reference buffers near site where analog signal enters board. Place 0.1µF ceramic decoupling capacitors within 10mm MAX194's power-supply voltage-reference pins. Keep analog-input signal ground return separate from analog ground plane, connecting analog ground only AGND MAX194. analog input signal groundreturn traces should both follow same route help reject common-mode noise.
Voltage Reference
voltage reference provides 4.096V reference, which buffered buffer isolates reference from MAX194's capacitive switching load. eliminate buffer circuit, traces connect wire from VREF pad.
Reference Buffer
reference input MAX194 buffered MAX400 used because drift. using bipolar (instead CMOS) amp, substrate connected quiet analog ground, reducing noise coupled through power supplies. feedback circuit consists four passive components: C17, isolates op-amp's output from heavy capacitive load that bypasses VREF pin. makes network accurate reference input (without reference voltage would appear output amp). compensates high-frequency response
Table Data-Interface Connections
9-26 68HC16 SIGNAL +12V Reserved Reserved Reserved MISO Reserved PCS0 Reserved MAX194 SIGNAL +12V VDDD Reserved Reserved RESET BP/UP/SHDN Reserved DOUT Reserved Reserved FUNCTION Ground Unregulated Supply Regulated from 68HC16 Module Reserved End-of-Conversion Output from MAX194 Reserved Active-Low RESET MAX194 Shutdown/Bipolar/Unipolar Input MAX194 Reserved QSPI Master Input; Serial Data Output from MAX194 Reserved QSPI Serial Clock from 68HC16 QSPI Chip-Select from 68HC16 Reserved
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
MAX194 evaluation board generates highquality power supplies from single input 20V), such plug-in wall transformer. When MAX194 evaluation board connected 68HC16 module, module uses unregulated input supply generate separate digital supply. converts unfiltered input down provide VDDA analog supply. Current spikes from digital supply VDDD attenuated Schottky diode protects device substrate. inverts +12V -12V, regulates -12V -5V, providing VSSA analog supply.
Table Current-Sense Jumpers
JUMPER POWER SUPPLY VDDA VSSA VSSD VDDD DESCRIPTION Analog Analog Digital Digital
Measuring Supply Current
measure supply current drawn MAX194, turn power prepare board carefully cutting traces IS1, IS2, IS3, IS4, installing 2-pin headers shunts (see Table
Each supply measured replacing corresponding shunt with current-meter connection. example, measure current drawn digital supply, replace shunt with current meter. direction current flow marked with arrows silkscreen. connect disconnect current meter while power After observing supply current operating shutdown modes, board restored installing shunts IS1-IS4.
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
INPUT BUFFER (OPTIONAL) VDDA R51, FILTERED DIGITAL GROUND ANALOG GROUND
VDDD
C171 0.01µF 1N5819 R12,
0.1µF
15µF
15µF
MAX400CPA
0.1µF BUFFERED INPUT
0.1µF
0.1µF
DIRECT INPUT
FILTERED
VDDD
VDDA
+12V UNREGULATED (OPTIONAL) 15µF 0.1µF COMP VOUT TRIM
0.1µF
MAX194
RESET CONV DOUT SCLK SHDN RESET CONV DOUT SCLK SHDN (OPTIONAL) 1000pF 0.01µF
TEMP
MAX874
4.096V
CONVCLK
(OPTIONAL) (OPTIONAL) (OPTIONAL) REFERENCE BUFFER
47µF LOW-ESR SANYO 6SA47M
0.01µF VREF 0.1µF FILTERED
DGND VSSD AGND VSSA
10µF
0.1µF
MAX400CPA
0.1µF
10µF FILTERED JU10 VSSA
10µF
0.1µF
VSSD
Figure MAX194 Schematic
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
VDDD P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 J1-27 J1-28 J1-29 J1-30 J1-31 J1-32 J1-33 J1-34 R11, "SHDN" 2x20 HEADER "UNI" R10, "AUTO"
RESET
DIGITAL GROUND ANALOG GROUND
VDDD QSPI_PCSO SHDN
"QSPI" "GND" Chip Select
MISO MOSI PCSO CLKOUT PWMA
J1-35 J1-36 J1-37 J1-38 J1-39 J1-40 VDDD
DOUT R13, QSPI_PCSO QSPI_PCSO "OSC" "QSPI" "EXT" CONVCLK "CONT" "QSPI"
CONV
CONV Select
0.1µF
SCLK EXTCLK1
XTAL OSC.
TEST POINTS
J2-10 J2-1 J2-2 J2-3 J2-4 J2-5 J2-6 J2-7 J2-8 J2-9 VDDD DOUT (CLKR) J3-9 (XF1) J3-8 J3-1 J3-10 CONV J3-2 (FSR) J3-4 (DR) (OPTIONAL) CONCLK
CONV
SHDN
DGND
SCLK
DOUT
RESET
CONVCLK
VDDD
(OPTIONAL)
Figure MAX194 Schematic (continued)
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
+12V UNREG ANALOG GROUND POWER GROUND
J1-1 J1-2 J1-3 J1-4
FILTERED 100µF
2x20 HEADER 100µF FILTERED POS12 -12V UNREG
UNREG +12VDC UNREG +12VDC
J1-5 J1-6
+12V UNREG
POS5 +12V UNREG 78LO5 10µF HC16 2x20 HEADER J1-7 J1-8 PGND AGND 10µF JU11 VDDD 1N5819 VDDA
+12V UNREG
10µF
ICL7662 CAP+ CAPV+ VOUT -12V/UNREG 10µF 79LO5 10µF VSSA VSSD
10µF
100µF
NEG12
NEG5
Figure MAX194 Schematic (continued)
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Figure MAX194 Component Placement Guide-Component Side
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Figure MAX194 Board Layout-Component Side
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Figure MAX194 Board Layout-Solder Side
MAX194 Evaluation System/Evaluation
_68HC16 Module Component List
DESIGNATION C10-C14 LED1 DESCRIPTION ceramic capacitors 22µF, radial-lead electrolytic capacitors 22pF capacitors 0.01µF capacitor Reference designator, used 0.1µF capacitors 1N4001 diode 40-pin right-angle male connector 2-circuit terminal block Right-angle printed circuit board mount, female socket Empty Empty Reference designator, used Empty Empty Empty Empty Empty Light-emitting diode 10M, resistor DESIGNATION C10-C14 LED1 DESCRIPTION ceramic capacitors 22µF, radial-lead electrolytic capacitors 22pF capacitors 0.01µF capacitor Reference designator, used 0.1µF capacitors 1N4001 diode 40-pin right-angle male connector 2-circuit terminal block Right-angle printed circuit board mount, female socket Empty Empty Reference designator, used Empty Empty Empty Empty Empty Light-emitting diode 10M, resistor
Evaluates: MAX194/MAX195
68HC16 Module _The 68HC16 module assembled tested printed-circuit board intended with Maxim's highspeed serial-interface evaluation kits kits). module uses inexpensive 8-bit implementation Motorola's MC68HC16Z1 microcontroller (µC) collect data samples high speed using QSPIinterface. requires IBM-compatible personal computer external power supply, typically specified manual. Maxim's 68HC16 module provided allow customers evaluate selected Maxim products. intended used microprocessor development platform, such supported Maxim.
68HC16 Module _Detailed Description
Power Input Connector
68HC16 module draws power from user-supplied power source connected terminal block sure note positive negative markings board. three-terminal regulator allows input voltages between absolute maximum 20V. 68HC16 module typically requires 200mA input current.
68HC16 Microcontroller
Motorola's 68HC16Z1 Contact Motorola information, development, support. Maxim kits high-speed queued serial peripheral interface (QSPI) internal chip-select generation. MAX707 module monitors logic supply, generates power-on reset, produces reset pulse whenever reset button pressed.
QSPI trademark Motorola Corp.
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
68HC16 uses phase-locked loop (PLL) speed. Crystal 32.768kHz frequency reference. internal oscillator runs times faster than external crystal. When 68HC16 reset, waits lock before executes software. After locks onto reference frequency, software doubles clock speed writing clock synthesizer control register, selecting speed 16.78MHz. user area, 32kbyte CMOS static RAM. 74HCT245 octal buffer lets 68HC16 module access 8-bit port 40-pin interface connector. This memory-mapped port consists separate read write strobes, four chip selects, four address LSBs, eight data bits.
Table Serial Communications Port
NAME None FUNCTION Handshake; hard-wired RS-232-compatible data output from 68HC16 module RS-232-compatible data input 68HC16 module Handshake; hard-wired Signal ground connection Handshake; hard-wired Handshake; hard-wired Handshake; hard-wired Unused
Serial Communications
RS-232 serial port, designed compatible with 9-pin serial port. straight-through male-to-female cable connect this port. only available serial port 25-pin connector, standard 25-pin 9-pin adapter. Table shows pinout MAX233 RS-232 interface voltage level shifter with transmitters receivers. includes built-in charge pump with internal capacitors that generates output voltages necessary drive RS-232 lines.
Table 40-Pin Data-Connector Signals
20-26 NAME VPREREG 7E000 7E800 7F000 7F800 EXTD0 EXTD1-7 MISO MOSI PCS0/SS CLKOUT PWMA FUNCTION Ground Unregulated input voltage from on-board regulator Read strobe Write strobe Chip select 7E000-7E7FF Chip select 7E800-7EFFF Chip select 7F000-7F7FF Chip select 7F800-7FFFF Address (LSB) Address Address Address Buffered data (LSB) Buffered data bits General port (LSB) General port General port General port General port General port General port General port QSPI master-in, slave-out QSPI master-out, slave-in QSPI serial clock QSPI chip-select output System clock output Pulse-width-modulator output
40-Pin Data Connector
header connects 68HC16 module Maxim kit. Table lists function each pin. Note that 68HC16 object code compatible with 68HC11 object code. 68HC16 module only with those modules that designed support only download code that targeted 68HC16 module. Downloading incorrect object code into 68HC16 module will have unpredictable results.
Address Ranges
68HC16 generates various enable signals different address ranges. enable signals directly respective chips. Several additional signals (J1.11-J1.14) available data connector used Maxim kits. Table outlines address ranges each elements found 68HC16 module, Table truth table that describes logic each 68HC16's chip-select outputs. Because addresses completely decoded, boot user have shadows.
MAX194 Evaluation System/Evaluation
Table 68HC16 Module Memory (all address values 20-bit hex)
00000-07FFF 08000-0FFFF 10000-17FFF 18000-1FFFF 20000-203FF 20400-7DFFF 7E000-7E7FF 7E800-7EFFF 7F000-7F7FF 7F800-7FFFF 80000-F7FFF F8000-FF6FF FF700-FF73F FF740-FF8FF FF900-FF93F FF940-FF9FF FFA00-FFA7F FFA80-FFAFF FFB00-FFB07 FFB08-FFBFF FFC00-FFDFF FFE00-FFFFF FUNCTION Boot (U3, strobed CSBOOT) Shadow boot User (U5, strobed CS2) Shadow user Internal standby RAM; 1kbyte Unused External chip select (CS7) External chip select (CS8) External chip select (CS9) External chip select (CS10) accessed 68HC16 Unused 68HC16's built-in (not used) Unused General-purpose timer module (GPT) Unused System integration module (SIM) Unused Internal standby (SRAM) control registers Unused Queued serial module (QSM) Unused
Boot
boot ROM, configured 8-bit memory device. Resistor pulls data during system reset, forcing fetch instructions using only upper eight data bits. boot checks system waits commands from host. Refer manual specific start-up procedures.
Evaluates: MAX194/MAX195
Software
software supplied disk with kit. Instructions operating software included manual. Refer manual more information.
_68HC16 Module Self Check
test 68HC16 module's integrity, connect power supply power terminals (J2). connect anything Slide power switch "ON" position. will light will flash within seconds. flashes with 50%-on/50%-off duty cycle, then passed self check. Note that this test does exercise RS-232 port 40-pin interface, does confirm that power supply, microprocessor, ROM, passed self test. flashes with 10%-on/90%-off duty cycle, then failed self check. Most likely, chip (U5) bad. remains does flash, then problem either (the EPROM), (the microprocessor), (the regulator), MAX707 reset generator, power supply. voltmeter verify that power supplies good. Check powersupply input output from regulator. oscilloscope 32.768kHz reference oscillator running.
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Table 68HC16 Chip-Select Outputs Truth Table
ADDRESS RANGE 0xxxx read 1xxxx read 1xxxx write 7E0xx read 7E0xx write 7E8xx read 7E8xx write 7F0xx read 7F0xx write 7F8xx read 7F8xx write CSBOOT CS10
LED1 PWMB
GROUND UNREGULATED REGULATED INTEL COMPATIBLE READ/WRITE STROBES CHIP SELECTS ADDRESS BITS
0.1µF
CS6/IOBUFFER CS1/RDIO
74HCT245
EXTD0 EXTD1 EXTD2 EXTD3 EXTD4 EXTD5 EXTD6 EXTD7
8-BIT BUFFERED BIDIRECTIONAL DATA
8-BIT GENERAL PORT
HIGH-SPEED SERIAL INTERFACE (QSM/QSPI)
VPREREG CS1/RDIO CS7/7E000 CS9/7F000 EXTD0 EXTD2 EXTD4 EXTD6 MISO CLKOUT
J1-1 J1-3 J1-5 J1-7 J1-9 J1-11 J1-13 J1-15 J1-17 J1-19 J1-21 J1-23 J1-25 J1-27 J1-29 J1-31 J1-33 J1-35 J1-37 J1-39
J1-2 J1-4 J1-6 J1-8 J1-10 J1-12 J1-14 J1-16 J1-18 J1-20 J1-22 J1-24 J1-26 J1-28 J1-30 J1-32 J1-34 J1-36 J1-38 J1-40
VPREREG CS5/WRIO CS8/7E800 CS10/7F800 EXTD1 EXTD3 EXTD5 EXTD7 MOSI PCSO/SS PWMA
TSTME BKPT/DSCLK BKPT/DSCLK HALT BERR MODCLK DSACK1 DSACK0 IRQ7 RESET J4-1 J4-3 J4-5 J4-7 J4-9 J4-2 J4-4 J4-6 J4-8 J4-10 BERR BKPT/DSCLK FREEZE IPIPE1/DSI IPIPE0/DS0
RESISTOR
Figure 68HC16 Module Schematic
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
0.1µF 0.01µF MISO MOSI PCSO/SS PWMA PWMB VSSE VSSI VDDI CS10/7F800 CS9/7F000 CS8/7E800 CS7/7E000 CS6/IOBUFFER CS2/RDRAM CS1/RDIO VSSE
VSSE VSSI
VSSE
ADA6 ADA7 VSTBY XTAL VDDSYN EXTAL VSSI VDDI VDDE VSSE CLKOUT FREEZE/QUOT TSTME/TSC BKPT/DSCLK IPIPE0/DS0 IPIPE1/DS1 RESET HALT BERR IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 IRQ2 IRQ1 MODCLK SIZ1 SIZ0 VSSE
PCS3 PCS2 PCS1 PCS0/SS MOSI MISO VSSE VDDE VSSI VDDI IC4/OC5 PWMA PWMB PCLK VSSE VDDE ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 BGACK ADDR1 ADDR2 VDDE VSSE ADDR3 ADDR4 ADDR5 ADDR6 ADDR7 ADDR8 VSSI ADDR9 ADDR10 ADDR11 ADDR12 ADDR13 ADDR14 ADDR15 ADDR16 ADDR17 ADDR18 VDDE VSSE VDDA VSSA ADA0 ADA1 ADA2 ADA3 ADA4 ADA5
MOTOROLA MC68HC16Z1CFC16
VDDE VSSE CSBOOT DATA0 DATA1 DATA2 DATA3 VSSI DATA4 DATA5 DATA6 DATA7 DATA8 DATA9 VDDE VSSE DATA10 DATA11 DATA12 DATA13 DATA14 DATA15 ADDRO DSACK0 DSACK1 AVEC VDDE
CSO/WRRAM CS5/WRIO VSSE CSBOOT/RDROM
VSSI
VSSE DSACKO DSACK1
VSSE
XTAL
EXTAL VSSI VDDI
VSSE CLKOUT FREEZE TSTME BKPT/DSCLK IPIPEO/DS0 IPIPE1/DSI RESET HALT BERR IRQ7
MODCLK
10µH OPTIONAL VSSI
0.1µF
Figure 68HC16 Module Schematic (continued)
VSSE
VSTBY
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
330k 22pF 32.768kHz 22pF XTAL EXTAL
J3-8 J3-7 T1OUT T2OUT R1IN R2IN C216 C211
T1IN T2IN R1OUT R2OUT C1VVV+
J3-2
RESET
MAX707
N.C. RESET RESET
J3-3 J3-4 J3-6 J3-1 J3-5
RESET
MAX233
POWER 1N4001 VPREREG 10µH
VSSE
J3-9
78M05
22µF
OPTIONAL
VDDI
22µF
VSSI
VSSE
RESET A(00:18)
RESET
62256
A(00:18)
I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7
0.1µF CSBOOT/RDROM
27C256
D(00:15)
0.1µF
CS2/RDRAM CS0/WRRAM
8-BIT HIGH-SPEED CMOS STATIC
8-BIT CMOS EPROM
Figure 68HC16 Module Schematic (continued)
D(00:15)
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Figure 68HC16 Module Component Placement Guide-Component Side
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Figure 68HC16 Module Board Layout-Component Side
MAX194 Evaluation System/Evaluation Evaluates: MAX194/MAX195
Figure 68HC16 Module Board Layout-Solder Side
1995 Maxim Integrated Products
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 (408) 737-7600
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Evaluates: MAX194/MAX195
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MAX194 Evaluation System/Evaluation
MAX194
product
City _State_Zip_Phone#
Address
Company
Name _Title
application
NUMBERS:
Featuring:
Product Data Sheets Evaluation Manuals Free Literature Request Cards
Call toll free 1-800-998-8800 free samples literature.
Germany (Maxim GmbH)
(01734) 305577
(408) 737-7194
1994 EVALUATION DATA BOOK
1994 Releases Data Book 1994 Battery Management DC-DC Converter Circuit Collection 1994 Applications Product Highlights Book 1993 Releases Data Book, Vol. 1993 Applications Product Highlights Book 1992 Releases Data Book, Vol. 1992 Applications Product Highlights Book
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MAX194 Evaluation System/Evaluation MAX194 Evaluation System (MAX

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