Evaluation Board Microprocessor System Temperature Monitor EVAL-ADM102

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Evaluation Board Microprocessor System Temperature Monitor EVAL-ADM102

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FEATURES On-chip remote temperature sensing calibration necessary accuracy on-chip sensor accuracy remote sensor Programmable over/under temperature limits 2-wire SMBus serial interface Supports SMBus Alert 5.5v supply QSOP package
Evaluation Board Microprocessor System Temperature Monitor EVAL-ADM1021A
EVALUATION SYSTEM PACKAGE CONTENTS evaluation system package contains following items:
This application note ADM1021A evaluation board Centronics cable Evaluation software
EVALUATION BOARD HARDWARE ADM1021A evaluation board contains following main components, which identified from block diagram, printed circuit board silk screen schematic diagram figures overleaf.
INTRODUCTION ADM1021A Evaluation Board allows ADM1021A microprocessor system temperature monitor quickly easily evaluated using personal computer. Using evaluation board accompanying software, ADM1021A interfaced personal computer running Windows95,Windows98, Windows2000 WindowsNT computer's parallel printer port, computer's SMBus. evaluation board allows input output functions ADM1021A exercised without need external components. software allows control monitoring ADM1021A's internal registers. ADM1021A following gives brief description ADM1021A system overview. Further information found data sheet device. ADM1021A hardware temperature monitor personal computers other microprocessor systems which features two-channel digital thermometer over/under temperature alarm. device measure temperature microprocessor using on-chip diode connected transistor cost small signal transistor such 2N3904 2N3906. measurement technique cancels absolute value transistor's base emitter voltage, that calibration required.
ADM1021A sensor transistors indicators power Alert Switches selecting power source, sensor, setting SMBus address Interface buffers Connectors parallel SMBus interface Test connector
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Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties which result from use. license granted implication otherwise under patent patent rights Analog Devices.
Windows registered trademark Microsft Corporation
Technology Way, P.O. 9106, Norwood. 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703
EVAL-ADM1021A
ALERT STBY 10-WAY CONNECTOR SMBUS (J4)* SENSOR ALERT DIMM INTERFACE CARD
ADM1021
SDATA SENSOR EXTERNAL SENSOR DGND SDATA SCLK SMBALERT GREEN POWER DVDD SCLK 36-WAY CENTRONICS CONNECTOR (J2)* BUFFERS
PARALLEL PORT
EITHER BOTH
ADD1 ADD0
TEST CONNECTOR
Figure ADM1021A Evaluation Board Block Diagram
Figure ADM1021A Evaluation Board SilkScreen
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Figure 3.ADM1021A Evaluation Board Schematic
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CONNECTORS, SWITCHES INDICATORS function various connectors, switches indicators evaluation board explained below. TEST CONNECTOR Test connector allows serial data clock lines ADM1021A ALERT line monitored. There also connections this connector allow monitoring supply voltage. external diode sensor connected between terminals. CENTRONICS INTERFACE CONNECTOR personal computer being used with evaluation board does have System Management motherboard, connection between evaluation board should made parallel printer port, using cable provided. connections follows: TABLE CONNECTIONS ADM1021A Function Parallel Port Function TABLE REMOTE SENSOR SELECT SWITCH Position Sensor Selected
2N3906 2N3904 D+/D- (connector
SERIAL ADDRESS SELECT (SW2, SW3) used LSB's ADM1021A's serial address, ADD0 ADD1. These pins three-state grounded left unconnected tied This means total nine addresses possible. should noted that ADD0 ADD1 only read power changed while ADM1021A change address will effective until device been powered then again. serial address bits, when storing 8-bit word must left right justified, with either 8-bit word zero. ADM1021A evaluation software stores 7-bit serial address left-justified makes zero. Table shows nine possible addresses ADM1021A TABLE ADM1021A DEVICE ADDRESSES
Serial Clock (SCLK) Serial Data (SDATA) Power Power Power Power Alert (ALERT)
SCLT
Address Pins ADD1(SW2) ADD0 (SW3)
Device Address Binary 0011000(0) 0011001(0) 0011010(0) 0101001(0) 0101010(0) 0101011(0) 1001100(0) 1001101(0) 1001110(0)
Serial Data Output
SMBUS INTERFACE CONNECTOR SMBus interface connector allows evaluation board connected direct SMBus personal computer using DIMM interface card (This included kit) make this connection necessary remove DIMM memory modules motherboard, DIMM sockets occupied. This will affect BIOS setup Windows, should only attempted competent user. REMOTE SENSOR SELECT SWITCH remote sensors provide evaluation board, 2N3906 transistor 2N3904 transistor. third remote sensor connected between terminals test connector
STANDBY SWITCH ADM1021A active standby input controlled evaluation board. This logic input that enables selection between normal operation (high) standby operation (low).This input performs same function status register.
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TABLE STANDBY SWITCH
Position
Mode standby mode normal mode
POWER SELECT SWITCH Power supplied board from Centronics connector from SMBus connector These positions indicated board correct position should selected depending interface used.
INSTALLING SOFTWARE software ADM1021A same software ADM1021A, hence refers ADM1021 only. install software, insert into CD-ROM drive should autorun. does then click Start icon, click Run, then type D:setup.exe file name. CD-ROM disk drive drive "D", type instead "D", where drive letter Drive USING SOFTWARE When using software first ensure evaluation board connected Parallel printer port, PC's SMBus using DIMM interface card. Check that correct postion supply power from from start software, select Start- Programs -Analog Devices ADM1021 Eval Software. When program started, startup screen will appear.
TABLE INDICATOR LEDS
WHEN
Board Power When ALERT output ADM1021A
UNUSED COMPONENTS following components shown evaluation board silk screen fitted, SW5, RESET switch. SOFTWARE Software allows ADM1021A's functions controlled from easy interface operating under Windows environment. contents device's internal registers easily read altered through user-friendly graphical interface, while Control Center window allows graphing temperature readings
Figure Evaluation Software Startup Screen
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Click "Next" next screen, which allows user select between connection evalution board printer port SMBus using DIMM interface card.
this decice intend click "Yes", otherwise select "No" continue looking another device.If select "Yes" following message will appear.
Once communucations medium been selected, click "Next" next screen. When ready software begin searching evaluation board either parallel port SMBus, click "Next".
ADM1021A found printer port, following message will appear.
software will search ADM1021A, when found, following screen will appear. device address given will depend setting SW3.
ADM1021A found SMBus, following message will appear.
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Press mouse button next step, which Software Intialisation Wizard. Main shows software version allows user communications setup quit program. also possible quit clicking close button READ/WRITE This displays information about ADM1021A's internal registers allows their contents read and/or altered. Each register button associated with Clicking button will display contents selected register register contents name each register bit. register contents also displayed hexadecimal decimal. Clicking register button causes contents read once continuous reading off. continuous reading register continuous will updated continuously. Click button toggle between type register selected, hexadecimal address, current value hexadecimal decimal previous value written register, also displayed. ADM1021A into standby mode clicking button, setting
this case check connections evaluation board, click "Back" again. this does work then re-booting re-running software. When software successfully found ADM1021A, click "Finish".An index-card type display with three tabs will appear.
Figure Main Program
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Configuration Register. legend button will change clicking again will return ADM1021A normal operating mode. Data written registers that Read/Write ,(refer data sheet more information). When Read/Write first selected, none registers have been written they contain their default values. Registers written ways. Clicking Read/Write display will toggle value between This useful where function controlled setting clearing individual bits register, example, turning standby mode setting clearing Mode Configuration Register. entire contents register changed typing decimal value text boxes Write display. button will change from green value written register clicking button.
This useful where register contains numeric value such temperature limit. ONE-SHOT OPERATION When ADM1021A into standby mode setting Configuration register clicking button, one-shot reading remote temperature taken clicking button. temperature found will then displayed. CONTROL CENTER Control Center allows readings displayed graphically bargraphs line graphs.
Figure Read/Write Program
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GRAPHS bottom Control Center bargraphs local remote sensors. These toggled clicking change button. legend will clicking again will turn when local remote temperature goes outside limits, ALERT (D2) evaluation board will light. turned clicking button, provided
bargraphs. high temperature limits changed moving pointer arrows below bargraphs. sampling rate changed rotating control knob next bargraphs. ALERT INDICATION When Control Center first selected, Alert Status Indicator off.
temperature gone back within limits, limits have been adjusted outside temperature reading. Alert Status Indicator automatically changes back green when temperature within limits. Alert detection turned again clicking
LINE GRAPHS Line graphs temperature against time plotted clicking button. legend will clicking again will stop
Alert detection turned clicking change button. legend will change graph.
While graph displayed screen, possible zoom moving arrows temperature time axes. Moving lower arrow temperature axis increases will become active. will change from green minimum temperature shown axis, while moving upper arrow down decreases maximum temperature displayed, thus zooming narrower temperature range. Similarly, moving left arrow right time axis and/ right arrow left displays narrower band time Figure Control Center Program this axis. indicator graph cleared clicking
button.
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Figure Normal Graph
Figure Zoomed
EASY SETUP
line bargraphs started with single click clicking button This starts
line bargraphs, sets temperature limits turns Alert detection.
FILE This function allows user record values remote local temperatures Microsoft Excel file. frequency which values stored file determined delay(sec) window. change this value, click screen type value seconds.
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start click "Make Log" button above "Open" will appear. Type name file click "Open". program will begin storing values both remote local temperatures file chosen intervils.The number lines logged will displayed Control Centre Window. stop writing file click "Not Logging file" button. view this table open document using Microsoft Excel. table similar follwoing should appear.
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ABOUT MENU About Menu main menu gives information about software contains copyright notice
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APPENDIX ADM1021A REGISTERS
More detailed information function registers found ADM1021A data sheet.
TABLE LIST ADM1021A REGISTERS READ ADDRESS (HEX) WRITE ADDRESS (HEX) NAME POWER-ON DEFAULT (BINARY)
Applicable Applicable NOTES
Applicable Applicable Applicable Applicable Applicable Applicable Applicable Applicable
Address Pointer Local Temp. Value Remote Temp. Value Status Configuration Conversion Rate Local Temp. High Limit Local Temp. Limit Remote Temp. High Limit Remote Temp. Limit One-Shot Remote Temp. Value Remote Temp. High Limit Remote Temp. Limit Configuration Test Byte Status Analog Test Byte Manufacturer Stepping
Undefined 1000 0000 1000 0000 Undefined 0000 0000 0000 0010 0111 1111 1100 1001 0111 1111 1100 1001 Note Undefined (Note Undefined (Note Undefined (Note 1000 0000 (Note Undefined (Note 0000 0000 (Note Undefined 0100 0001 0000 0011
Writing address causes ADM1021A perform single measurement. data register sucha does matter what data written These registers reserved future versions device.
TABLE STATUS REGISTER ASSIGNMENTS
TABLE CONFIG. REGISTER ASSIGNMENTS
Name BUSY
Function When Converting
Name MASK1 RUN/STOP
Function ALERT Enabled ALERT Masked Standby Reserved
Power-on Default
LHIGH* When Local High-Temp Limit Tripped LLOW* When Local Low-Temp Limit Tripped RHIGH* When Remote High-Temp Limit Tripped RLOW* When Remote Low-Temp Limit Tripped OPEN* When Remote Sensor Open-Circuit Reserved
These flags stay high until status register read they reset POR. REV.A 07/01 -13-
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TABLE5. CONVERSION RATE REGISTER CODES
Data
Conversion/sec 0.0625 0.125 0.25 Reserved
Average Supply Current typ. VCC=3.3V
APPENDIX COMPONENT LIST Capacitors C1,C4 Resistors R2,R3 Semiconductors Q3904 Q3906 0.1µF 10µF tantalum fitted 5-way resistor pack 2N3904 2N3906 Green fitted 1N914 (1N4148) BAT41 Connectors Switches SW1,SW2,SW3 SW4, Miscellaneous Fuse 50mA mount fuse 3-way slide switch 2-way slide switch 8-way test socket 36-way Centronics connector fitted way, 0.1", right-angle, latching header fitted
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Evaluation Board Microprocessor System Temperature Monitor EVAL-ADM102

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