DUAL SLOPE 4-PHASE CONTROLLER ALD500 CONTROL LOGIC FUNC
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ALD523D MULTIFUNCTION 7-DIGIT SERIAL INPUT DISPLAY MODULE CONTROLLER
DUAL SLOPE 4-PHASE CONTROLLER
ALD500
CONTROL LOGIC
FUNCTIONS SELECTORS
ANALOG INPUT
SERIAL BINARY -DIGIT DECIMAL CONVERTER DISPLAY MODULE CONTROLLER
CHARACTER DISPLAY MODULE
EXTERNAL SERIAL BINARY INPUT
SERIAL INTERFACE LOGIC
EEPROM MEMORY CONTROLLER
EEPROM
ALD523D BLOCK DIAGRAM
PRODUCT FEATURES BENEFITS
full digit plus sign 9999999) display Built-in serial binary digit decimal converter Compatible with industry standard 1-line 2-line Character Display Modules User defined 16-alphanumeric character TITLE field three 8-alphanumeric character UNIT fields Wide range alphanumeric display characters Functional with either display modules with column drivers Designed operate optionally with ALD500/ALD500R Precision Analog Signal Processors directly with serial inputs User selected integration time conversion speed Cost effective multipurpose stand alone operation optional modes operation: Mode calibrated reference mode Mode ratiometric mode Mode display only mode Support external serial binary input bits) 3-wire serial interface microprocessors microcontrollers Electrical programmable memory interface Crystal oscillator frequency Single power supply separate sets 7-DIGIT Display Sets sets user defined 64-bit arithmetic multiplication factor Software programmable serial data mask sign polarity mask different sets user selected data sample averaging with maximum 128X sampling Optional 13-function user configurable hardware selection switches Automatic zero level shifting during power-on-reset Automatic zero level overwrite feature Adjustable decimal point placement with trailing digit blanking External EEPROM memory easy change factory settings Sleep mode with Auto Power-On-Reset. Easy setup calibration system setup parameters software programming required Interface Software provided Calibration Setup modes
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
PRODUCT APPLICATIONS Embedded -digit) digital panel meter Customized/specialized instrument display High precision voltage meters Dedicated precision monitors High resolution converter with display High accuracy noise weigh scale systems Multifunction precision measurement instruments Serial binary input decimal/character display converter Portable battery operated display systems.
PRODUCT ORDERING INFORMATION
OPERATING TEMPERATURE RANGE* +70oC 28-Pin Plastic Package (PDIP) +70oC 28-Pin Small Outline Package (SOIC)
ALD523DPH
ALD523DSH
Contact factory industrial temperature range
ALD523D CONFIGURATIONS CALIBRATED REFERENCE (MODE-A)
ALD523D
COUT S1/SCL B1/D4 B2/D5 DSA1/D6 DSA2/D7 XTAL2 XTAL1 COUT PWRCS PACKAGE S3/RS S2/EN DATOUT SCLK DATIN DEC2/D3 DGND DEC1/D2 SEL1/D1 SEL0/D0 DVCS S1/SCL B1/D4 B2/D5 DSA1/D6 DSA2/D7 XTAL2 XTAL1 COUT PWRCS PACKAGE COUT
RATIOMETRIC (MODE-B)
ALD523D
S3/RS S2/EN DATOUT SCLK DATIN Z/D3 DGND
M/D2 SEL1/D1 SEL0/D0 DVCS
DISPLAY ONLY (MODE-C)
ALD523D
B1/D4 B2/D5 DSA1/D6 DSA2/D7 XTAL2 XTAL1 PWRCS DATOUT SCLK DATIN DEC2/D3 DGND
DEC1/D2 SEL1/D1 SEL0/D0 DVCS
PACKAGE 2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ALD523D
GENERAL DESCRIPTION ALD523D Multifunction 7-Digit Serial Input Display Module Controller designed interface directly ALD500 ALD500R integrating dual slope precision analog processors chip building high precision high accuracy analog-to-digital converter system with auto zero auto-polarity. ALD523D also functions universal serial input 7-digit display module controller that interfaces most popular industry standard serial data formats from other microprocessors data converters. designed easy setting industry standard Character Display Modules (CDM) such 1-line 16-character 2-line 16-character display modules. ALD523D enhanced version ALD521D digital controller. ALD523D functions three separate operating modes, namely calibrated reference (mode-A), ratiometric (mode-B), display only (mode-C). ALD523D digital controller operates master display module controller either stand-alone mode external microprocessor control mode. external microprocessor control mode, ALD523D directly interface with under software control standard parallel printer port. This external control mode managed Serial Interface Logic inside ALD523D. stand-alone mode, ALD523D makes continuous measurements, includes necessary functions fully control CDM. stand-alone mode, ALD523D operates conjunction with EEPROM chip preserve setup parameters arithmetic (calibration) parameters ALD523D. setup arithmetic parameters uploaded EEPROM ALD523D Setup Calibration software (DVM523). ALD523D communicates EEPROM handshake protocol governed EEPROM Memory Controller inside ALD523D. ALD500/ALD500R dual slope precision analog processors consist on-chip digital control circuitry accept control inputs, integrating buffer amplifiers, analog switches, voltage comparators. functions four operating phases, namely auto zero, integrate, de-integrate, integrator zero phases. conversion, comparator output goes from high when integrator crosses zero during de-integration. ALD500/ALD500R dual slope precision analog processors also provide direct logic interface ALD523D. ALD523D implements logic timing four phases ALD500/ALD500R, namely auto zero, integrate, de-integrate, integrator zero phases modeA mode-B operations. These four phases governed Dual Slope 4-Phase Controller inside ALD523D. ALD523D operates from external clock internal oscillator circuit along with external crystal. internal system clock ALD523D runs frequency which selected divide-by rate crystal external) clock frequency. ALD523D offers display settings, known display sets, namely "DGS1", "DGS2" "DGS3". "DGS1" also optional hardware decimal point setting mode, known "DGS0", which allows user hardware jumper switches decimal point position. Each display allows full 7-digit decimal number converted from 16-bit 32-bit serial binary number using Serial Binary Decimal Converter inside ALD523D. This decimal number also scaled MULTIPLIER number, result scaled number displayed through Display Module Controller within ALD523D. Additional display parameters that manipulated are: Digit Blanking, which allows user selection number digits display; Decimal Point placement, which controls placement decimal point, any. sets display UNIT fields available, each with combination alphanumeric characters characters long. ALD523D also features hardware control-input pins power down (PWRCS), integration time selection (S1, S3), data sample averaging (DSA1 DSA2), digit blanking B2), decimal point placement (DEC1 DEC2), zero offset display selection (SEL0 SEL1). When used, control desired, each these optional pins wired their respective desired logic state, either Ground (DGND), through pull-up pull-down resistors. functions control-input pins managed Control Logic section ALD523D. MODES OPERATIONS ALD523D functions either single operating mode multiple operating modes, namely calibrated reference (mode-A), ratiometric (mode-B), display only (modeC). single operating mode, ALD523D operates three modes operation, either mode-A, modeB mode-C. multiple operating modes, ALD523D operate interchangeably each three
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
different operating modes. This feature becomes useful applications that require multiple modes operations where three different types measurements made displayed. CALIBRATED REFERENCE MODE (MODE-A) calibrated reference mode (mode-A) primarily intended measurements against calibrated reference voltage. reference voltage either internal external. this mode, ALD523D runs internal analog-to-digital controller manage data conversion from analog-to-digital converter chip with calibrated reference voltage such integrating dual slope precision analog processors ALD500R. practical applications utilizing this mode operation precision digital voltmeter system design (see Application Design Note-AN523DA). this mode, ALD500 also used instead ALD500R, with external voltage reference. block diagram mode-A shown figure ALD523D configuration identification section mode-A layout description.
EEPROM CHARACTER DISPLAY MODULE (1-LINE) (2-LINES)
shown figure ALD523D configuration identification section mode-B layout description.
EEPROM CHARACTER DISPLAY MODULE (1-LINE) (2-LINES)
ALD523D
ALD500
ANALOG INPUT
FUNCTIONS SELECTORS
Figure Ratiometric mode (mode-B) block diagram.
III. DISPLAY ONLY MODE (MODE-C) display only mode (mode-C) primarily intended receiving ready external serial binary data, converting processing data, showing processed data CDM. this mode, ALD523D runs internal display controller manage, process, display received serial binary data from transmitting instrument device. applications utilizing this mode operation external interface MB1S precision digital voltmeter system. block diagram mode-C shown figure ALD523D configuration identification section mode-C layout description.
EEPROM
ALD523D
ALD500R
ANALOG INPUT
FUNCTIONS SELECTORS
Figure Calibrated reference mode (mode-A) block diagram.
EXTERNAL INSTRUMENT (SERIAL DATA)
ALD523D
CHARACTER DISPLAY MODULE (1-LINE) (2-LINES)
RATIOMETRIC MODE (MODE-B) ratiometric mode (mode-B) primarily intended measurements against ratiometric reference voltage. this mode, ALD523D runs internal analog-to-digital controller manage data conversion from analog-todigital converter chip such integrating dual slope precision analog processors ALD500 with ratiometric reference voltage. practical example applications utilizing this mode operation precision weigh scale system design (see Application Design Note-AN523DB). block diagram mode-B ALD523D
FUNCTIONS SELECTORS
Figure Display only mode (mode-C) block diagram.
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ALD523 SETUP CALIBRATION SOFTWARE stand-alone mode, ALD523D operates conjunction with EEPROM chip preserve setup arithmetic (calibration) parameters ALD523D. These parameters utilized fully control measurement functions. parameters preset user through ALD523D Setup Calibration software known DVM523.EXE, later uploaded EEPROM standard parallel printer port. ALD523D Setup Calibration User Guide (DVM523) more details. SELECTING CONFIGURING MODES OPERATIONS three ALD523D modes operations, namely modeA, mode-B, mode-C configured .CDS file (see Table ALD523D Setup Calibration Software User Guide), selected means user selection SEL0 SEL1 control inputs ALD523D. Each display "DGSx" associated mode parameter "Mx" which specifies mode operation. Hence, "DGS1", "DGS2", "DGS3" have associated mode specifying parameters "M1", "M2", "M3", respectively. Each "Mx" parameter preset either "Mode-A", "Mode-B", "Mode-C". CALIBRATED REFERENCE MODE (MODE-A) Mode-A selected setting nibble "M1" parameter, "M2" "M3" byte "M2-M3" parameter (HEX) .CDS file. "M1", "M2", "M3" mode selection parameters associated with "DGS1", "DGS2", "DGS3" display sets, respectively. mode-A mode-B operation, masking "SMSK1" "SMSK4" polarity masking "SMSK5" "SMSK8" parameters utilized. However, this mode transmits 24-bit serial word DATOUT. This 24-bit serial word consists 23-bit binary data with first bit, 23rd bit, followed sign last bit. sign logical positive sign, logical negative sign. RATIOMETRIC MODE (MODE-B) Mode-B selected setting nibble "M1" parameter, "M2" "M3" byte "M2-M3" parameter (HEX) .CDS file.
When ALD523D powered first time after power-on-reset, zero correction automatically zeroing reading. This automatic zero correction feature manually overwritten switch (see Table time. overwrite feature embedded eliminate long wait time long integration time, flexibility perform zero correction time. However, faster integration time set, less wait time needed perform automatic zero correction (i.e. takes typically from about seconds automatically zero reading integration time 16.66 respectively). III. DISPLAY ONLY MODE (MODE-C) Mode-C selected setting nibble "M1" parameter, "M2" "M3" byte "M2-M3" parameter (HEX) .CDS file. mode-C operation, switches "S1", "S2", "S3" internally disabled. mode-C operation, ALD523D receives maximum serial word length bits accordance serial clock pulses, processes maximum 21-bit serial word plus sign within this 32-bit serial word. This 21-bit serial word 21-bit consecutive serial data stream segment within 32-bit serial clocks, selected programming masks "SMSK1" through "SMSK4". length received serial word governed DVCS signal. transition DVCS from high state signals start serial input data stream clocking. transition DVCS from high state stops serial input data stream clocking. After external instrument processor sets DVCS logic DATIN terminal ALD523D ready serial input data stream. ALD523D reads first serial input data stream DATIN sends serial clock pulse SCLK acknowledge signal external instrument processor. Then ALD523D reads second serial input data stream sends second SCLK clock pulse. This serial data reading clocking process continues until DVCS high state until maximum serial input data bits have been read. serial clock SCLK consists high transition followed high transition. maximum converted decimal number from this 21-bit binary data plus sign 9999999, when suitable multiplier appropriate conversion factor used. sign defined logic positive sign, logic negative sign. Alternatively, sign
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
polarity serial clock SCLK polarity inverted, described next section. positions serial data bits sign within given serial data word determined data mask register "SMSK1" "SMSK4" sign mask register "SMSK5" "SMSK8" parameters .CDS file. masking rules follows: Maximum serial word length that ALD523D receive bits SCLK clock cycles. serial bits optionally sign bit. serial word less than bits, last clock SCLK clock stream when DVCS goes from stops data word counter. Maximum serial data bits that ALD523D process bits plus sign total bits. Minimum serial data bits that ALD523D process bits, including sign bit. number clock cycles between when DVCS goes from when DVCS goes from defines total input serial word length, right justified, from input mask register. input serial data bits must consecutive order, from first last. sign anywhere outside serial data bits stream within serial data word.
SMSK2, serial data stream. Data being continuously clocked into ALD523D until 23rd clock cycle until DVCS goes from "1". data word positioned 19th clock cycle. length serial word determined number consecutive masking bits, which bits. Sign masking user programming SMSK5 through SMSK8 from memory address 67H. Initially, bits from SMSK5 SMSK8 anywhere between SMSK5 through SMSK8 indicates position where sign information located. There only within 32-bit serial data stream, situated outside serial data stream, remaining bits must bits. this example, data word clock cycles. Table illustrates example sign masking technique. sign data available first clock cycle 23-bit data word stream. this example, placing anywhere between fourth SMSK6, through bits SMSK7, until fifth SMSK8, corresponding between clock cycle 19th SCLK clock cycle, allowed. This example also valid number SCLK, between input data word, while DVCS low.
SMSK5 Byte-5 00000000 SMSK6 Byte-6 01000000 SMSK7 Byte-7 00000000 SMSK8 Byte-8 00000000
SIGN MASKING masking user programming SMSK1 through SMSK4 from memory address 63H. SMSK1 indicates position first bits 32-bit serial data word mask. SMSK2, SMSK3 SMSK4 indicates position next bits 32-bit serial data word mask, respectively. Initially, bits When last anywhere within serial data word, sets position. starts MSB, followed bits, until reached. After bit, subsequent must left bits. number bits between determines length serial data word.
SMSK1 Byte-1 00000000 SMSK2 Byte-2 00001111 SMSK3 Byte-3 11111111 SMSK4 Byte-4 11110000
Binary Hexadecimal
bit31
Table Sign masking technique.
bit0
default mode, sign defined logic positive sign, logic negative sign, serial clock SCLK. option, sign serial clock polarity inverted setting "Mx" equal (HEX) instead (HEX). serial clock becomes SCLK, sign polarity defined logic positive sign, logic negative sign (see Table ALD523D Setup Calibration Software User Guide). SELECTING CONFIGURING DISPLAY LINE WITH FREQUENCY MODE INPUT CLOCK DIVIDER ALD523D designed compatible with industry standard 1-line 16-character 2-line 16-character CDM, operate under different input frequencies clock source. This feature programmable through "SETF" parameter .CDS file. "SETF" parameter 4-bit hexadecimal number (0-B) located first line .CDS file, corresponds address EEPROM.
Binary Hexadecimal
bit31
Table Serial data masking technique.
bit0
Table illustrates example serial masking technique. this example, there SCLK clock cycles, sign data word. SCLK clock starts SMSK2. starts clock cycle, ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
X-TAL EXT. CLOCK
DATA UNIT DISPLAY LINE first line 1-line 16-character second line 2-line 16-character divided into DATA field UNIT field, illustrated figure ALD523D converts 24-bit plus sign serial data stream 7-digit decimal number with sign. 7-digit number, when displayed with sign decimal point, takes total characters. This 7-digit number displayed DATA field starting first character 1-line starting first character second line 2-line CDM.
SETF
SYSTEM CLOCK
SETF
DATA FIELD
UNIT FIELD
1-LINE 16-CHARACTER
Figure Programmable input frequency divider clock source.
TITLE LINE FIELD DATA FIELD UNIT FIELD
4-bit hexadecimal number defines selection either 1-line 16-character 2-line 16-character display, along with operating frequency modes (low high) input frequency dividers respectively. high frequency mode operates ALD523D emission mode standard mode, respectively. input frequency divider further scales down input clock source from divide integer number illustrated figure SELECTING CONFIGURING DISPLAY TITLE LINE With ALD523D, 16-character display TITLE line field custom programmed according user's choices, displayed first line 2-line 16character CDM. characters this TITLE line field configured through "TTL1" "TTL16" parameters, which 16-byte hexadecimal numbers located second third lines .CDS file, corresponds addresses from EEPROM memory address (see Table character codes patterns ALD523D Setup Calibration Software User Guide). TITLE line field displayed when 1-line 16-character display used.
2-LINE 16-CHARACTER
Figure Character Display Module TITLE, DATA, UNIT fields.
remaining characters 16-character line used UNIT character displays. user combination characters remaining character fields. general, these characters used display UNIT measure, such "VOLT" "KILOGRAM" "PSI". maximum characters displayed UNIT field. However, first character UNIT field "blank", (HEX), then full digit plus sign decimal point displayed. Otherwise, only maximum digit plus sign decimal point displayed, last digit digit number overwritten UNIT display character. example, using "KILOGRAM" UNIT display, maximum digits displayed digits. order have digits displayed, UNIT label changed "_KGM" where first character 8-character UNIT field blank character (HEX).
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
SELECTING CONFIGURING DISPLAY SETTINGS ALD523D uses SEL0 SEL1 control-input pins selecting different display sets "DGS0", "DGS1", "DGS2", "DGS3". Each display "DGSx" associated mode operation "Mx", unit display "UNTx", decimal point placement "LxDEC", multiplier scale factors "±CALx", where x=0, SEL0 SEL1 switches have logical states operations described Table Each logical state combination selects different measurement labels/units, scale factors, decimal point location, mode selections. modes operation, SEL0 SEL1 software switch setting selections override hardware jumper functions DEC1 DEC2 switches when either SEL0 SEL1 logical "1". When SEL0=0 SEL1=0, ALD523D selects display "DGS0", which consists combination "M1", "UNT1", "+CAL1" "-CAL1" parameters from addresses 00H, 1FH, 37H, EEPROM memory, respectively. calibrated reference mode (mode-A) display only mode (mode-C), DEC1 DEC2 hardware jumper switches used place decimal point. mode-B operation, decimal point displayed. When SEL0=1 SEL1=0, ALD523D selects display "DGS1", which consists combination "M1", "L1DEC", "UNT1", "+CAL1" "-CAL1" parameters from addresses 00H, 05H, 1FH, 37H, EEPROM memory, respectively. decimal point placed according content "L1DEC" parameter.
When SEL0=0 SEL1=1, ALD523D selects display "DGS2", which consists combination "M2", "L2DEC", "UNT2", "+CAL2" "-CAL2" parameters from addresses 01H, 06H, 27H, 47H, EEPROM memory, respectively. decimal point placed according content "L2DEC" parameter. When SEL0=1 SEL1=1, ALD523D selects display "DGS3", which consists combination "M3", "L3DEC", "UNT3", "+CAL3" "-CAL3" parameters from addresses 01H, 07H, 2FH, 57H, EEPROM memory, respectively. decimal point placed according content "L3DEC" parameter. Each "M1", "M2", "M3" parameters 4-bit hexadecimal number located first line .CDS file (see Table ALD523D Setup Calibration Software User Guide data sheet layout). Each these "M1", "M2", "M3" parameters have content data "A", "B", which corresponds modeA, mode-B, mode-C default mode, mode-C clock sign inverted polarity mode, respectively. Each "L1DEC", "L2DEC", "L3DEC" parameters 8-bit hexadecimal number addresses 05H, 06H, first line location .CDS file, respectively.
GROUP FUNCTION SWITCHES
DISPLAY SETTING SEL0 SEL1 DISPLAY DGS0 DGS1 DGS2 DGS3 UNIT UNT1 UNT1 UNT2 UNT3 MULTIPLIER ±CAL1 ±CAL1 ±CAL2 ±CAL3 OPERATION DECIMAL J2/NoDec L1DEC L2DEC L3DEC MODE SELECTION
Table Display setting switch configurations operations.
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
mode-A operation, conversion factor "±CAL1" parameters resulted from hardware calibration, they scaled through scale factor parameter "N1" specified inside DVM523.EXE program. "±CAL2" "±CAL3" parameters obtained from scaling conversion factor "±CAL1" through scale factor parameters "N2" "N3" specified inside DVM523.EXE program, respectively. Scale Conversion Factor Key) section ALD523D Setup Calibration Software User Guide implement these "N1", "N2", "N3" scale factors. mode-B operation, conversion factor "±CAL1" parameters generated from ratiometric reference value from .MDS file, from inputting "+CAL1" "-CAL1" conversion factors directly into Input Conversion Factor screen DVM523.EXE keyboard. These conversion factors "±CAL1" scaled through scale factor parameter "N1" from DVM523.EXE program. "±CAL2" "±CAL3" parameters obtained from scaling conversion factor "±CAL1" values through scale factor parameters "N2" "N3" from same Input Conversion Factor screen, respectively. Scale Conversion Factor Key) Input Conversion Factor CAL1 (µV/CT) Key) section ALD523D Setup Calibration Software User Guide implementation details. mode-C operation, conversion factor "±CAL1" parameter defined from inputting "+CAL1" "CAL1" conversion factors which scaleable through scale factor parameter "N1" from Input Conversion Factor screen DVM523.EXE program. "±CAL2" "±CAL3" parameters obtained from scaling conversion factor "±CAL1" through scale factor parameters "N2" "N3" from same Input Conversion Factor screen. Input Conversion Factor CAL1 (µV/CT) Key) section ALD523D Setup Calibration Software User Guide more information. "UNT1" parameter consists 1-byte hexadecimal numbers consisting "UNT11" "UNT18" parameters located fourth line .CDS file (see Table Table ALD523D Setup Calibration Software User Guide data sheet layout hexadecimal codes, respectively). When "DGS0" "DGS1" display selected, each 1-byte hexadecimal number specifies alphanumeric character defined table CDM. When "UNT11" parameter space character (20H), full 7-digit number displayed followed 7-character label UNIT field CDM. Otherwise, 6-digit number displayed followed 8-character label UNIT field. Similarly, ALD523D
"UNT2" "UNT3" parameters displayed when "DGS2" "DGS3" display sets selected. SELECTING CONFIGURING DECIMAL POINT PLACEMENT ZERO OFFSET mode-A mode-C operations, DEC1 DEC2 switches correspond input pins ALD523D, respectively. They functionally grouped into either mode-A mode-C operation, DEC1 DEC2 switches jumper hardware switches used specify location placement decimal point displayed reading. DEC1 DEC2 switch setting combinations described Table
GROUP FUNCTION SWITCHES LOGIC LEVEL DECIMAL POINT PLACEMENT SETTING DEC1 DEC2 DECIMAL POINT PLACEMENT XXXXXXX XXXXXX XXXXX XXXX
Table Decimal Point setting switch combination mode-A mode-C.
DEC1 DEC2 hardware jumper switches only functional when display "DGS0" selected. When DEC1=0 DEC2=0, ALD523D instructs display display entire number without decimal point. When DEC1=1 DEC2=0, ALD523D displays number with decimal point placed after first digit. When DEC1=0 DEC2=1, ALD523D utilizes this information display number with decimal point placed after second digit. When DEC1=1 DEC2=1, ALD523D sets display display number with decimal point placed after third digit. This function effectively allows scaling displayed reading. example, reading display 123.456 Volt range 0.123456 KiloVolt another display same range. Decimal placement also programmed software parameters "L1DEC", "L2DEC", "L3DEC" which selected part display selections. "L1DEC",
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
"L2DEC", "L3DEC" separate decimal point placement instruction commands, each associated with display "DGS1", "DGS2", "DGS3", respectively. Each command uses same format, valid parameters "00", "01", "02", "03", "04", "05". "00" instructs display module display decimal point. "01" instructs display module display decimal point after digit. "02" instructs display module display decimal point after digit. "03" instructs display module display decimal point after digit. "04" instructs display module display decimal point after digit. "05" instructs display module display decimal point after digit. mode-B operation, DEC1and DEC2 switches change function become switches order perform zero level adjustment. switches correspond control input pins ALD523D, respectively. They functionally grouped into pins logical states operations described Table
GROUP FUNCTION SWITCHES LOGIC LEVEL ZERO LEVEL OPERATION ZERO LEVEL SHIFTING ZERO LEVEL SHIFTING ZERO LEVEL
modes operations with combinations shown Table Each logical state combination selects numbers digits displayed.
GROUP FUNCTION SWITCHES LABEL/UNIT LOGIC LEVEL DIGIT BLANKING NUMBER DIGITS DISPLAYED CHARACTER CHARACTER UNIT UNIT 7-Digits 6-Digits (XXXXXXX) (XXXXXX) 6-Digits 6-Digits (XXXXXX) (XXXXXX) 5-Digits 5-Digits (XXXXX) (XXXXX) 4-Digits 4-Digits (XXXX) (XXXX)
Table Blanking switch combination mode-A, mode-B, mode-C.
When label/unit "UNT1" "UNT2" "UNT3" parameter 7-characters, B1=0 B2=0, ALD523D sets display module display full 7-digit number. When label/unit "UNT1" "UNT2" "UNT3" parameter 8-characters, B1=0 B2=0, ALD523D sets display module display full 6-digit number. When B1=1 B2=0, ALD523D instructs display module blank last display digit, display displays 6-digit number. B1=0 B2=1, ALD523D blanks last digits display, display show only 5-digit number. Likewise B1=1 B2=1, ALD523D sets display show only first digits number. SELECTING CONFIGURING MEASUREMENT SAMPLE AVERAGING effective techniques minimize measurement noise increase stability apply sampling average number serial data samples. ALD523D uses this technique stabilize serial data sample reading filtering noise associated with these samples. general, higher number serial data samples, better noise rejection, also takes longer display respond input changes. default recommended sample averaging offers good tradeoff between conversion time noise rejection. ALD523D utilizes DSA1 DSA2 control-input pins selecting three different sets data sampling, namely "AVG1", "AVG2", "AVG3".
Table Zero level switch configurations operations mode-B.
switch master control switch, which controls switch. When M=0, switch function disabled, zero offset value included displayed reading. When M=1, zero level shifting turned Z=1, zero level indicated zero offset value stored inside controller's memory registers. When Z=0, reading with zero level shifting displayed. this mode, zero offset value previously stored read back from controller's memory registers subtracted from current reading. displayed reading automatic zero correction. This function analogous TARE button many weigh scales. SELECTING CONFIGURING DIGITS BLANKING ALD523D uses control-input pins setting "blanking" trailing digits display's decimal digits. switches applied ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
three modes operations, DSA1 DSA2 pins ALD523D function data sample averaging selection switches. Four DSA1 DSA2 switch combinations described Table Each logical state combination selects pre-defined averaging/sampling.
GROUP FUNCTION SWITCHES LOGIC LEVEL DATA SAMPLE AVERAGING DSA1 DSA2 AVERAGE Average AVG1 128) AVG2 128) AVG3 128)
SELECTING CONFIGURING INTEGRATION TIME When ALD500/ALD500R ALD523D used together chip set, integration time needs selected system. maximum 50/60-cycle line power noise rejection, Integration time tINT must picked multiple period power line frequency. example, tINT times 16.667msec, 33.333msec, 50.000msec, 66.667msec, 100msec, 166.67msec, 200msec, 300msec maximize 60Hz power line noise rejection. tINT times 100msec, 200msec, 300msec maximize 50Hz power line noise rejection. general, longer integration time, better noise rejection power line noise, also takes longer complete conversion cycle. Default recommended integration time 100msec offers best tradeoff noise performance, conversion time both 50/60-cycle power line noise rejection. 100msec integration time also offers benefit being universally optimal both cycles power line noise rejection. ALD523D utilizes control-input pins selecting different integration times. mode-A mode-B, these switches different integration time different measurement needs based different RInt CInt time constant values (see ALD500/ALD500R data sheet more information). However, these three pins disabled mode-C operation. logical state combinations listed Table
Table Averaging selection switch combination modeA, mode-B, mode-C.
When DSA1=0 DSA2=0, ALD523D nonaveraging mode. DSA1=1 DSA2=0, ALD523D utilizes "AVG1" parameter address EEPROM memory. DSA1=0 DSA2=1, ALD523D utilizes "AVG2" address EEPROM. DSA1=1 DSA2=1, ALD523D utilizes "AVG3" address EEPROM. "AVG1", "AVG2", "AVG3" parameters 8-bit hexadecimal numbers addresses 02H, 03H, first line .CDS file, respectively. Valid "AVG1", "AVG2" "AVG3" values 128. These values correspond number data samples averaged.
GROUP FUNCTION SWITCHES LOGIC LEVEL
INTEGRATION TIME SELECTION INTEGRATION TIME 16.667 33.333 50.000 66.667 100.000 166.667 200.000 300.000 APPRX. CONVERSION CYCLES
Table Integration time selection switch combination mode-A mode-B.
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
POWER POWER DOWN Upon power power-on-reset, ALD523D initializes internal counters, registers, ports, CDM. Then reads setting control-input pins, sets mode operation programmed instructions preset user EEPROM memory. When mode operation been preset, message "PROGRAM MEMORY" displayed CDM. Next, checks status PWRCS pin. logical state PWRCS powers ALD523D, logical state PWRCS powers down ALD523D well ALD500R (mode-A) blanks both mode-A mode-B). crystal oscillator circuit ALD523D also stopped. start power ALD523D again, simply logical state PWRCS pin. external microprocessor therefore utilize this control ALD523D power-on status. power down feature used, then PWRCS must grounded through pull-down resistor leave ALD523D continuously power-on mode. REFERENCE CALIBRATION MODE ALD523D designed interface directly ALD500 ALD500R integrating dual slope precision analog processors work together chip set. beneficial features ALD500R ALD500 precision internal voltage reference, which eliminates need introducing external reference voltage conversion system, equal improved system performance along with reduced component count cost. block diagram reference calibration mode shown figure Unlike many external reference voltage circuits where reference voltage calibration performed tweaking trimmer pots, internal reference voltage calibration performed through software calibration method, i.e. DVM523.EXE (see Calibrate Reference Voltage Key) section ALD523D Setup Calibration Software User Guide). Upon power during normal running condition, ALD523D continuously checks status controlinput pins namely DVCS CAL, respectively entering setup calibration modes. logical state DVCS logical instruct ALD523D enter reference calibration mode.
Upon entering reference calibration mode, measurement data ALD523D transmitted serially SCLK DATOUT pins. ALD523D sets SCLK logic state with first serial data transmitted simultaneously DATOUT pin. reads first DATOUT sends serial clock pulse DVCS line acknowledge signal. This serial data read process continues rest serial bits with alternatively sending serial clock pulses every read, until SCLK logic state after clock cycles.
ALD523D
ALD500R
ANALOG INPUT
Figure Reference calibration mode block diagram.
24-bit serial word corresponding serial clock pulses consists 23-bit binary word with first 23rd bit, followed sign last bit. sign logical positive sign, logical negative sign. Calibration mode also used serial output port mode, where output binary word clocked device microprocessor having access CAL, SCLK, DATOUT, DVCS pins. detail calibration timing shown "ALD523D Mode-A Reference Calibration Timing" section this data sheet. When high calibration mode, ALD523D returns normal continuous running mode.
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
EEPROM MEMORY ALD523D organized operate conjunction with (128 bytes bits) bi-directional two-wire serial interface protocol EEPROM memory with page write bytes) capability typical write cycle time page write, i.e. 24LC01B compatible. ALD523D stores setup parameters arithmetic parameters specific memory address locations EEPROM. These parameters transferred from DVM523.EXE software internal registers ALD523D standard parallel printer port, page written EEPROM from ALD523D's internal registers serial address/data (SDA) serial clock (SCL) lines. Once initiated, data transfers between ALD523D then EEPROM performed handshake basis automatically. setup parameters predefined inside .CDS file, where arithmetic parameters obtained from calibration process and/or conversion factor scaling. DATA TRANSFER MODE FROM ALD523D setup parameters arithmetic parameters ALD523D stored specific memory address locations depicted Table ALD523D Setup Calibration Software User Guide, uploaded EEPROM from parallel printer port (see Upload Page Key) Upload Page (#5Key) Memory section ALD523D Setup Calibration Software User Guide upload EEPROM DVM523.EXE). block diagram data transfer mode shown figure
this mode, message "UPLOAD MEMORY" displayed Characters Display Module (CDM) indicate ALD523D data transfer mode. Parameters uploading EEPROM transferred from ALD523D serially SCLK DATIN pins, with bytes 8-bit data (total bits) page data. Initially, page counters within ALD523D DVCS logic state with first serial data transmitted simultaneously DATIN pin. ALD523D reads first DATIN sends serial clock pulse SCLK acknowledge signal. This serial data upload process continues rest serial bits with alternatively receiving DVCS pulses from sending corresponding serial clock pulses every read, until counter along with DVCS logic state, which then turn uploaded into EEPROM automatically ALD523D, using page write mode. Then page counter advanced second page, puts second DVCS logic state, begins transfer next bytes 8-bit data. Through repeated serial clock data valid handshakes DVCS SCLK pins, either pages pages bytes 8bit serial data transmitted DATIN into ALD523D's internal registers. This uploading process fully automatic. 64-bit serial clock pulses transmit 64-bit binary data with first last bit. detailed timing shown "Data Transfer From section this data sheet. Once sets logic setup mode, ALD523D returns normal running mode.
INTERFACE
ALD523D
EEPROM
Figure Data transfer mode block diagram.
Upon power during normal running condition, ALD523D continuously checks status DVCS CAL, respectively setup calibration mode. logical state DVCS with logical ALD523D Data Transfer from mode.
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ALD523D
DEFAULT PULL-UP PULL-DOWN RESISTORS Switches jumpers used interface ALD523D control-input pins directly desired logic level, either DGND, through 15-k pull-up pull-down resistors. This method connection adopted default (standard) connection. Figure shows example standard connection where switch jumper used pull display selection SEL1 control-input down logic level through pull-down resistor with switch closed. SEL1 control-input pulled logic level through 15-k pull-up resistor with switch opened. This method connection allows both pull-up pulldown resistors installed simultaneously. When switch closed, normally logical state, which sets SEL1=0. However, when ALD523D transferring data CDM, same changes function from SEL1 ALD523D output overrides both pull-up pull-down resistors. other multiplexed pins that interface multiplexed same way.
CHARACTER DISPLAY MODULE ALD523D controller designed easy setting industry standard Character Display Modules (CDM) such line 16-character 2-line 16-character display modules. These Character Display Modules consist high contrast liquid crystal vacuum fluorescence panels. Each module contains industry standard controller such HD44780 equivalent, necessary drivers. This industry standard controller equipped with internal Character Generator RAM), Display Data RAM), Column Driver such LC7930N equivalent. ALD523D contains necessary display function instructions fully display characters display line(s), access available alphanumeric characters within ROM. Standard font version CGROM, European font version CGROM, other custom versions CGROM used with ALD523D. more information, consult with manufacturer's technical data.
ALD523D
SEL1/D1
R-PullUp
PMOS
NMOS
SEL0/D0
R-PullDown
R-PullUp R-PullDown
Figure 15-k pull-up pull-down resistor connection switch.
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ABSOLUTE MAXIMUM RATINGS3 Supply voltage, +6.7V Differential input voltage range -0.3 0.3V Power dissipation Operating temperature range +70oC Storage temperature range -65oC +150oC Lead temperature, seconds +260oC Maximum allowable output current sinked _25mA Maximum allowable output current sourced _25mA
OPERATING ELECTRICAL CHARACTERISTICS 70oC, +5V, fXTL 3.6864 unless otherwise specified
Parameter Supply Symbol Unit Test Conditions
Operating Voltage Range Supply Current Supply Current Shutdown Mode Supply Current
Input Characteristics
ISDD
3.5V PWRCS +5V,
Input Voltage High Input Voltage Input Leakage Current
Output Characteristics
-0.3
Output Voltage High Output Voltage
Iout Iout
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
TIMING CHARACTERISTICS 70oC, +5V, fXTL 3.6864 MHz, internal system clock fXTL/4 unless otherwise specified
Parameter Display Only (Mode-C) Timing Symbol Unit Test Conditions
DATIN Setup Time Serial Clock Time Serial Clock High Time DVCS DATIN Valid Time Serial Clock DVCS High Time
Power Timing
tSCL tSCH tDIV tDVCSH tPOR tCALDV tSCLKH tSCLKL tDSdelay tSCDVH tSCDVL tDVH tSCCAL tINT tINTZ tDVS tDNV tDATOUT fXTL fOSC
16.2 67.6 67.62 22.22 0.271 16.667 3.6864 tINT 500,000
Conv. Cycle CAL, PWRCS, COUT, DVCS
Power-On-Reset Time
Data Transfer From Timing
Calibration Data Valid Time Serial Clock High Time Serial Clock Time Data Valid Serial Clock Delay Time Serial Clock Data Valid High Time Serial Clock Data Valid Time DATIN Setup Time Data Valid High Time Serial Clock Calibration Time
Reference Calibration Timing
Auto Zero Time Integration Time1, Integrator Zero Time Calibration Setup Time Calibration Delay Time5 DATOUT Valid Setup Time DATOUT Valid Time DATOUT Valid Time DATOUT Valid Time Time DATOUT Time
Input Output Characteristic Timing
Input Interrupt Time Rise/Fall Times 10pF)
Oscillator (OSCIN, OSCOUT)
Crystal Frequency External Frequency (OSCIN)
Rise time/Fall time
Apply only calibrated reference (mode-A) ratiometric (mode-B) operations. Extendible from hardware switches through "SETF" parameter .CDS file. Lower integration time than minimum allows more conversion cycles second reduced count resolution. Higher integration time increases count resolution, requires increased capacitor value lowered number conversion cycles second. De-integration time depends selection full scale input range, integration capacitor value voltage reference. Sensitive Device. Stresses above those listed under Absolute Maximum Ratings cause permanent damage device, affect device reliability performance. ALD523D handshake using page write mode. Calibration delay time (tCD) short start auto zero phase cycle time could determined. asynchronous operation, must minimum complete conversion cycle assure synchronization start auto zero phase cycle time.
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ALD523D
DISPLAY ONLY (MODE-C) TIMING
DVCS FROM SERIAL SOURCE
tDIV tSCL
SCLK* SERIAL SOURCE
tDVCSH
VALID
tSCH
DATIN FROM SERIAL SOURCE
SIGN
VALID
*Note: Default mode SCLK, which inverted produce SCLK software setup.
DATA TRANSFER FROM TIMING
FROM tCALDV tDVH DVCS FROM tSCDVL tSCLKH SCLK tDSdelay tSCDVH DATIN FROM
VALID VALID
tSCCAL tCALDV
tSCLKL
VALID
number serial data bits, integer
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ALD523D
ALD523D MODE-A REFERENCE CALIBRATION TIMING
ALD500 ALD500 FROM COUT FROM ALD500 SCLK
tINT tDINT tINTZ
tDVS tDNV
DVCS FROM DATOUT
VALID (MSB) (LSB) VALID VALID SIGN VALID
tDATOUT
VALID
EXPANDED VIEW
tDNV SCLK DVCS FROM DATOUT
VALID (MSB) VALID
VALID
(LSB)
VALID
SIGN
VALID
tDATOUT
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ALD523D IDENTIFICATION CALIBRATED REFERENCE MODE (MODE-A)
SYMBOL COUT DSA1, DSA2, XTAL2 XTAL1 COUT PWRCS DVCS SEL0, SEL1, DEC1, DGND DEC2, DATIN SCLK DATOUT FUNCTION COMPARATOR OUTPUT MEMORY SERIAL ADDRESS/DATA INTEGRATION TIME SWITCH, MEMORY SERIAL CLOCK BLANK SWITCH, DISPLAY DATA BLANK SWITCH, DISPLAY DATA AVERAGING SWITCH, DISPLAY DATA AVERAGING SWITCH, DISPLAY DATA POWER SUPPLY CRYSTAL OSCILLATOR CRYSTAL OSCILLATOR COMPARATOR OUTPUT CALIBRATION SIGNAL POWER CHIP SELECT CHIP SELECT INPUT MEMORY WRITE PROTECT INPUT DATA VALID CHIP SELECT MODE SWITCH, DISPLAY DATA MODE SWITCH, DISPLAY DATA DECIMAL POSITION SWITCH, DISPLAY DATA DIGITAL GROUND DECIMAL POSITION SWITCH, DISPLAY DATA DATA SERIAL CLOCK DATA INTEGRATION TIME SWITCH, DISPLAY ENABLE INTEGRATION TIME SWITCH, DISPLAY REGISTER SELECT SIGNAL PROPAGATION INPUT INPUT/OUTPUT INPUT/ OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT OUTPUT INPUT INPUT INTERRUPT INPUT INPUT OUTPUT OUTPUT OUTPUT OUTPUT INPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT OUTPUT OUTPUT INPUT/OUTPUT INPUT/OUTPUT
ALD523D IDENTIFICATION RATIOMETRIC MODE (MODE-B)
SYMBOL COUT DSA1, DSA2, XTAL2 XTAL1 COUT PWRCS DVCS SEL0, SEL1, DGND DATIN SCLK DATOUT FUNCTION COMPARATOR OUTPUT MEMORY SERIAL ADDRESS/DATA INTEGRATION TIME SWITCH, MEMORY SERIAL CLOCK BLANK SWITCH, DISPLAY DATA BLANK SWITCH, DISPLAY DATA AVERAGING SWITCH, DISPLAY DATA AVERAGING SWITCH, DISPLAY DATA POWER SUPPLY CRYSTAL OSCILLATOR CRYSTAL OSCILLATOR COMPARATOR OUTPUT CALIBRATION SIGNAL POWER CHIP SELECT CHIP SELECT INPUT MEMORY WRITE PROTECT INPUT DATA VALID CHIP SELECT MODE SWITCH, DISPLAY DATA MODE SWITCH, DISPLAY DATA ZERO MASTER SWITCH, DISPLAY DATA DIGITAL GROUND ZERO SWITCH, DISPLAY DATA DATA SERIAL CLOCK DATA INTEGRATION TIME SWITCH, DISPLAY ENABLE INTEGRATION TIME SWITCH, DISPLAY REGISTER SELECT SIGNAL PROPAGATION INPUT INPUT/OUTPUT INPUT/ OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT OUTPUT INPUT INPUT INTERRUPT INPUT INPUT OUTPUT OUTPUT OUTPUT OUTPUT INPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT OUTPUT OUTPUT INPUT/OUTPUT INPUT/OUTPUT
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
ALD523D IDENTIFICATION DISPLAY ONLY MODE (MODE-C)
SYMBOL DSA1, DSA2, XTAL2 XTAL1 PWRCS DVCS SEL0, SEL1, DEC1, DGND DEC2, DATIN SCLK DATOUT FUNCTION MEMORY SERIAL ADDRESS/DATA MEMORY SERIAL CLOCK BLANK SWITCH, DISPLAY DATA BLANK SWITCH, DISPLAY DATA AVERAGING SWITCH, DISPLAY DATA AVERAGING SWITCH, DISPLAY DATA POWER SUPPLY CRYSTAL OSCILLATOR CRYSTAL OSCILLATOR CALIBRATION SIGNAL POWER CHIP SELECT MEMORY WRITE PROTECT DATA VALID CHIP SELECT MODE SWITCH, DISPLAY DATA MODE SWITCH, DISPLAY DATA DECIMAL POSITION SWITCH, DISPLAY DATA DIGITAL GROUND DECIMAL POSITION SWITCH, DISPLAY DATA DATA SERIAL CLOCK DATA DISPLAY ENABLE DISPLAY REGISTER SELECT SIGNAL PROPAGATION INPUT/OUTPUT OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT OUTPUT INPUT INPUT INPUT OUTPUT INPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT OUTPUT OUTPUT OUTPUT OUTPUT
ALD523D
2001 Advanced Linear Devices, Inc., Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286 12/01 http://www.aldinc.com
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