Omega Engineering OME-A8111 Computer Hardware User Manual
Contents
1. www omega com e mail info omega com OME A8111 ISA BUS Multi Functional Board Hardware Manual OMEGAnet Online Service Internet e mail www omega com info omega com USA ISO 9001 Certified Canada Servicing North America One Omega Drive P O Box 4047 Stamford CT 06907 0047 TEL 203 359 1660 FAX 203 359 7700 e mail info omega com 976 Bergar Laval Quebec H7L 5A1 Canada TEL 514 856 6928 FAX 514 856 6886 e mail info omega ca For immediate technical or application assistance USA and Canada Mexico Benelux Czech Republic France Germany Austria United Kingdom ISO 9002 Certified Sales Service 1 800 826 6342 1 800 TC OMEGA Customer Service 1 800 622 2378 1 800 622 BEST Engineering Service 1 800 872 9436 1 800 USA WHEN TELEX 996404 EASYLINK 62968934 CABLE OMEGA En Espa ol 001 203 359 7803 e mail espanol omega com FAX 001 203 359 7807 info omega com mx Servicing Europe Postbus 8034 1180 LA Amstelveen The Netherlands TEL 31 0 20 3472121 FAX 31 0 20 6434643 Toll Free im Benelux 0800 0993344 e mail sales amp omegaeng nl Frystatska 184 733 01 Karvin Czech Republic TEL 420 0 59 6311899 FAX 420 0 59 6311114 Toll Free 0800 1 66342 e mail info omegashop cz 11 rue Jacques Cartier 78280 Guyancourt France TEL 33 0 1 61 37 29 00 FAX 33 0 1 30 57 54 27 Toll Free in France 0800 466 342 e mail sales ome2. X don t care Channel Bit 2 Bit Bit 0 0 0 0 0 1 0 0 1 2 0 1 0 3 0 1 1 4 1 0 0 5 1 0 1 6 1 1 0 7 1 1 1 NOTE The settling time of the multiplexer depends on the source resistance of input sources Approx Source resistance 0 1 KO Approx Settling time 3 ps Approx Source resistance 1 KO Approx Settling time 5 ps Approx Source resistance 10 KO Approx Settling time 10 us Approx Source resistance 100 KO Approx Settling time 100 ps Sec 2 4 6 gives information about settling time delay OME A 8111 Hardware Manual ver 1 1 Jul 2003 15 2 4 8 A D Mode Control Register WRITE A D Mode Control Register Format x jo u o p X don t 2 DI DO Software Trig Pacer Trig Software Interrupt O 0 O sao x Se X o o i sa x see X o ri o x x X lilo x select Select Select X disable SD SII SIO IRQ Level 0 0 0 IRQ2 0 0 1 Not used 0 1 0 IRQ2 0 1 1 IRQ3 1 0 0 IRQ4 1 0 1 IRQ5 1 1 0 IRQ6 1 1 1 IRQ7 The A D conversion operation can be divided into 2 stages trigger stage and transfer stage The trigger stage will generate a trigger signal to the A D converter and the transfer stage will transfer the results to the CPU The trigger method may be an internal trigger or an external trigger The internal tr
3. bit will be cleared to zero Low OME A 8111 Hardware Manual ver 1 1 Jul 2003 12 2 4 3 D A Output Latch Register WRITE Base 4 Channel 1 D A Low Byte Data Format D pe ps ja jp p j WRITE 5 Channel 1 D A High Byte Data Format x k k pu po ps D A 12 bit output data D11 D0 D11 MSB D0 LSB X don t The D A converter will convert the 12 bits of digital data to analog output The low 8 bits of D A channel are stored in address BASE 4 with the high 4 bits are stored in address BASE 5 The D A output latch registers are designed as a double buffered structure so the analog output latch registers will be updated until the high 4 bits of digital data are written The users should send the low 8 bits first and then send the high 4 bits to update the 12 bits of AD output latch registers NOTE Send low 8 bits first then send high 4 bits 2 4 4 DII Input Buffer Register READ Base 6 Input Buffer Low Byte Data Format D ps ja jp p j READ Baser7 D I Input Buffer High Byte Data Format D15 D14 D13 D12 Dio 16 bit input data D15 D0 D15 MSB LSB OME A 8111 provides 16 TTL compatible digital inputs The low 8 bits are stored in address BASE 6 The high 8 bits are stored in address BASE 7 OME A 8111 Hardware Manual ver 1 1 Jul 2003 13 2 4 5 Clear Interrupt Request WRITE 8 Clear Interrup
4. is validate The A D converter can be triggered by software trigger or pacer trigger Detailed information is given in sec 2 4 8 and 2 7 Writing any value to address BASE C will generate a trigger pulse to the A D converter and initiate an A D conversion operation The address 5 offers a ready bit to indicate that an A D conversion is complete The software driver uses this control word to detect the OME A 8111 hardware board The software initiates a software trigger and checks the ready bit If the ready bit cannot clear to zero in a fixed time the software driver will return an error message If there is an error in the I O BASE address setting the ready bit will not be cleared to zero The software driver A8111 CheckAddress uses this method to detect the status of the I O BASE address setting OME A 8111 Hardware Manual ver 1 1 Jul 2003 17 2 4 10 D O Output Latch Register WRITE Base D D O Output Latch Low Byte Data Format os spi po J WRITE Base E D O Output Latch High Byte Data Format 015 D14 D13 D12 pio D8 D O 16 bits output data D15 D0 DIS MSB D0 LSB The 8111 provides 16 TTL compatible digital outputs The low 8 bits are stored in address BASE D The high 8 bits are stored in address BASE E OME A 8111 Hardware Manual 1 1 Jul 2003 18 2 5 Digital The OME A 8111 provides 16 digital input channels and 16 digital output channel
5. ver 1 1 Jul 2003 1 3 4 DA Converter Channels 1 independent Type 12 bit multiplying Analog device AD 7948 Linearity 1 2 bit Output Range 0 5 V or 0 10 V jumper selected may be used with other AC or DC reference input Maximum output limit 10V Output Drive 5 mA Settling Time 0 6 microseconds to 0 01 for full scale step 1 3 5 Digital Output port 16 bits TTL compatible Input port 16 bits TTL compatible 1 3 6 Interrupt Channel Level 3 4 5 6 7 jumper selectable Enable Via control register OME A 8111 Hardware Manual ver 1 1 Jul 2003 1 3 7 Programmable Timer Counter Type 82C54 8 programmable timer counter Counters The counter and counter2 are cascaded as 32 bit pacer timer Pacer output 0 00047 Hz to 0 5 MHz Input Gate TTL compatible Internal Clock 2 MHz 1 3 8 Applications Signal analysis FFT amp frequency analysis Transient analysis Production test Process control Vibration analysis Energy management Industrial and laboratory measurement and control 1 4 Product Check List In addition to this manual the package includes the following items OME A 8111 multifunction card OME A 8111 utility diskette CD ROM OME A 8111 Hardware Manual ver 1 1 Jul 2003 2 Hardware Configuration 2 1 Board Layout Z CN2 D C IN m t D C OUT
6. 2003 29 3 2 D A Calibration Steps Pa SO A8111CAL EXE Connect D A channel0 pin 30 of CN1 to DVM Adjust VR1 until DVM 5 0000V Press Enter key Adjust VR2 until DVM 0 0000V 3 3 A D Calibration Steps O GO O Q BW NO Press key Connot A D Channel 0 to analog ground CN1 Pin1 to CN1 Pin20 Input stable DC 4 9988V to A d channel 1 pin2 of CNI Connect DVM to TP1 amp Adjust VR5 until DVM 0 0000V Press Enter Key Adjust VR4 until A D data shows 4094 or 4095 Press Enter Key Adjust VR3 until A D data shows 2047 or 2048 10 Repeat step 3 tostep 11 until 11 A D channel 0 input 4 9988V gt A D reading 4094 or 4095 A D channel 0 input 0 V A D reading 2047 or 2048 Press Enter Key 3 4 DI O Testing 12 Use 20 pin flat cable OME CA 2010 OME CA 2020 Option to link CN2 to CN3 13 Press Enter Key OME A 8111 Hardware Manual ver 1 1 Jul 2003 30 WARRANTY DISCLAIMIER OMEGA ENGINEERING INC warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase OMEGA s WARRANTY adds an additional one 1 month grace period to the normal one 1 year product warranty to cover handling and shipping time This ensures that OMEGA s customers receive maximum coverage on each product If the unit malfunctions it must be returned to the factory for evaluation OMEGA s Customer Service De
7. DISCLAIMED LIMITATION OF LIABILITY The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on contract warranty negligence indemnification strict liability or otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OMEGA assumes no responsibility as set forth in our basic WARRANTY DISCLAIMER language and additionally purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product s in such a manner RETURN REQUESTS INQUIRIES Direct all warranty and repair requests inquiries to the OMEGA Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST OBTAIN AN AUTHORIZED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned AR number should then be marked on the outside of the return package and on any correspondence The purc
8. _ oo N N N N m gt gt 105 gm jo or CM amp gt L m NM uf erm gt BB ADS 774 z ay N lt 5 gt lt S lt 129 5 lt Un oz L S 8 OME A 8111 Hardware Manual ver 1 1 Jul 2003 2 2 lO Base Address Setting The 8111 occupies 16 consecutive locations address space The base address is set by switch SW1 The default address is 0x220 as shown below A9 A8 A7 A6 5 4 JETRNE SWI BASE ADDRESS BASE ADDR 200 20F 210 21 230 23 RE 30030 OFF OFF ON ON m mE orr orr orr default base address is 0x220 OME A 8111 Hardware Manual ver 1 1 Jul 2003 9 The port mapping 1 given below EGA 2BO2DF EGA BCO3CF EGA DEC 2E7 ATGPIB 8 03 CGA 2 3 Jumper Setting 2 3 1 JP1 D A Internal Reference Voltage Selection Select 5 V D A voltage output 0 to 5 V both channels Select 10 V D A voltage output 0 to 10 V both channels OME A 8111 Hardware Manual ver 1 1 Jul 2003 10 2 4 Register Address The OME A 8111 occupies 16 consecutive PC I O addresses The following table lists the registers and their locations 8254 Counter 0 8254 Counter 0 Based 8254 Counter 1 8254 Counter 1 Base Base Base Base Base Base Base Ba
9. ct analog input Cs A D mode control register BASE B select trigger type and transfer type sec 2 4 8 A D software trigger control register BASE C sec 2 4 9 The block diagram is given below 12 bits A D OME A 8111 OME A 8111 Hardware Manual ver 1 1 Jul 2003 21 2 7 1 A D conversion flow Then the user must decide which A D conversion mode will be used The software driver supports three different modes The user can control the A D conversion by polling mode very easily sec 2 4 9 It is recommended to use the software driver if using interrupt or DMA mode The analog input signals come from CNI The multiplexer can accept 8 single ended lines into the gain control module The gain control module also needs settling time if the gain control code changed Because the software doesn t monitor the settling time the user should reserve enough settling time if switching from one channel to the next sec 2 4 6 The output of the gain control module feeds into the A D converter The A D converter needs a trigger signal to start an A D conversion cycle The OME A 8111 supports software trigger or pacer trigger mode 2 7 2 AID Conversion Trigger Modes OME A 8111 supports two trigger modes 1 Software Trigger Writes any value to the A D software trigger control register BASE A will initiate an A D conversion cycle This mode is very simple but very difficult to control the sampling rate 2 Pacer T
10. e 8111 provides three connectors Connect 1 CN1 functions for analog input amp analog output input Connector 2 CN2 functions as 16 digital outputs Connector 3 CN3 function as a digital output CN1 CN2 CN3 Pin Assignment CNI Analog input Analog output Connect Pin Assignment Pin Number Description Pin Number Description 1 A D Analog Input Channel 0 20 Analog GND 2 A D Analog Input Channel 1 21 Analog GND 3 A D Analog Input Channel 2 22 Analog GND 4 A D Analog Input Channel 3 23 Analog GND 5 A D Analog Input Channel 4 24 Analog GND 6 A D Analog Input Channel 5 25 Analog GND 7 A D Analog Input Channel 6 26 Analog GND 8 A D Analog Input Channel 7 27 Analog GND 9 Not Used 28 Analog GND 10 Analog GND 29 Analog GND 11 Not Used 30 D A Analog Voltage output 12 Not Used 31 Not Used 13 Not Used 32 Not Used 14 Analog GND 33 Not Used 15 Analog GND 34 Not Used 16 Not Used 35 Not Used 17 Not Used 36 Not Used 18 Not Used 37 Not Used 19 PCB s 5 output OME A 8111 Hardware Manual ver 1 1 Jul 2003 26 CN2 Analog input Analog output Connect Pin Assignment Pin Number Description Pin Number Description 1 Digital Input O TTL 2 Digital Input 1 TTL 3 Digital Input 2 TTL 4 Digital Input 3 TTL 5 Digital Input 4 TTL 6 Digital Input 5 TTL 7 Digital Input 6 TTL 8 Digital Input 7 TTL 9 Digital Inp
11. els of isolated digital input signals Isolation can protect the PC if an abnormal input signal is occurs 2 11 3 OME DB 16R The OME DB 16R provides a 16 channel SPDT relay output The OME A 8111 provides a 16 channel TTL compatible digital output from CN3 If connecting to the OME DB 16R the OME A 8111 can provide a 16 channel relay output to control power devices 2 11 4 OME DB 37 The OME DB 37 15 a general purpose screw terminal board It provides a 37 pin connector This board directly connects to a 37 pin D sub connector It is suitable for easy signal connection and measurement OME A 8111 Hardware Manual ver 1 1 Jul 2003 28 3 Calibration The OME A 8111 is calibrated to its best state of operation For environments with large vibration recalibration 1 recommended Before calibrating the OME A 8111 users should have the following items One 6 digit multi meter One stable voltage source 4 9988V Diagnostic program this program is included in the delivered package and will guide the user to in proceeding with the calibration 3 1 Calibration VR Description There are seven VRs on the OME A 8111 Calibration is needed to adjust all seven VRs Description VRI Gain adjustment VR2 D A Offset adjustment VR3 AD Offset adjustment VR4 Gain adjustment VRS ApD s PGA Programmable Gain Amplifier Offset Adjustment D A Converter OME A 8111 Hardware Manual ver 1 1 Jul
12. er to sec 2 4 9 Scan the READY bit of the A D high byte data until READY 0 refer to sec 2 4 2 Read the 12 bits of A D data refer to sec 2 4 2 Convert these 12 bits of binary data to floating point value refer to OME A 8111 DOS Software Manual sec 4 7 and sec 4 8 OME A 8111 Hardware Manual ver 1 1 Jul 2003 23 2 8 D A Conversion The OME A 8111 provides two 12 bit D A converters Before using the D A conversion function user should notice the following issues D A output register BASE 4 BASE 5 BASE 6 BASE 7 sec 2 4 3 JP1 JP2 selects internal external reference voltage sec 2 4 1 NOTE The DA output latch registers are designed as a double buffered structure The user must send the low byte data first then send the high byte data to store the DA 12 bit digital data If the user only sends the high byte data then the low byte data will be still the previous value Also if the user sends high byte first then sends low byte the low byte data of DA is still held in the previous one OME A 8111 Hardware Manual ver 1 1 Jul 2003 24 2 9 Analog Input Signal Connection FIG 1 Connecting analog input configuration OME A 8111 A D CHO A D CHn AGND Signal Shielding Signal shielding connections are shown in Figl Use single point connection to frame ground not AGND or OME A 8111 OME A 8111 Hardware Manual ver 1 1 Jul 2003 25 2 40 Pin Assignment Th
13. ga fr Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056 9398 0 FAX 49 0 7056 9398 29 Toll Free in Germany 0800 639 7678 e mail info omega de One Omega Drive River Bend Technology Centre Northbank Irlam Manchester M44 5BD United Kingdom TEL 44 0 161 777 6611 FAX 44 0 161 777 6622 Toll Free in United Kingdom 0800 488 488 e mail sales omega co uk It is the policy of OMEGA to comply with all worldwide safety and EMC EMI regulations that apply OMEGA is constantly pursuing certification of its products to the European New Approach Directives OMEGA will add the CE mark to every appropriate device upon certification The information contained in this document is believed to be correct but OMEGA Engineering Inc accepts no liability for any errors it contains and reserves the right to alter specifications without notice WARNING These products are not designed for use in and should not be used for patient connected applications OME A 8111 Hardware User s Manual OME A 8111 Hardware Manual ver 1 1 Jul 2003 Table of Contents 1 Introduction 4 1 1 General Description 4 1 2 Features 4 1 3 Specifications 5 1 3 1 Power Consumption 5 1 3 2 Analog Inputs 5 1 3 3 A D Converter 5 1 3 4 DA Converter 6 1 3 5 Digital 6 1 3 6 Interrupt Channel 6 1 3 7 Programmable Timer Counter 7 1 3 8 Applications 7 1 4 Product Check List 7 2 Hard
14. haser is responsible for shipping charges freight insurance and proper packaging to prevent breakage in transit FOR WARRANTY RETURNS please have the FOR NON WARRANTY REPAIRS consult OMEGA following information available BEFORE for current repair charges Have the following contacting OMEGA information available BEFORE contacting OMEGA 1 Purchase Order number under which the product 1 Purchase Order number to cover the COST was PURCHASED of the repair 2 Model and serial number of the product under 2 Model and serial number of the product and warranty and 3 Repair instructions and or specific problems 3 Repair instructions and or specific problems relative to the product relative to the product OMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 2002 OMEGA ENGINEERING INC rights reserved This document may not be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without the prior written consent of OMEGA ENGINEERING INC Where Do Find Everything Need for Process Measurement and Control OMEGA Of Course Shop online at www omega com TEMPERATURE Thermocouple amp Thermistor Probes Connectors Panels amp Assemblies 4 Wire Therm
15. igger can be a software trigger or a pacer trigger The software trigger is very simple but can not control the sampling rate very precisely In software trigger mode the program issues a software trigger command sec 2 4 9 any time needed Then the program will poll the A D status bit until the ready bit is 0 sec 2 4 2 OME A 8111 Hardware Manual ver 1 1 Jul 2003 16 The pacer trigger can control the sampling rate very precisely So the converted data can be used to reconstruct the waveform of the analog input signal In pacer trigger mode the pacer timer will periodically generate trigger signals to the A D converter This converted data can be transfer to the CPU by polling or interrupt or DMA transfer method The software driver provides three polling or interrupt transfer methods The polling subroutine A8111 AD PollingVar or A822 AD PollingArray sets the A D mode control register to 0x01 This control word means software trigger and polling transfer The interrupt subroutine A822 AD INT START sets the A D mode control mode register to ox06 This control word means pacer trigger and interrupt transfer The interrupt subroutine 822 AD DMA START sets the A D mode control register to 0x06 This control word means pacer trigger and DMA transfer 2 4 9 A D Software Trigger Control Register WRITE A D Software Trigger Control Register Format x k x k k k X don t care XXXXXXXX any 8 bits data
16. mmable gain 1 2 4 8 and 16 The OME A 8111 contains a 12 bit ADC with up to 8 single ended analog inputs The maximum sample rate of the A D converter is about 30K sample sec There is a 12 bit DAC with voltage outputs 16 channels of TTL compatible digital input and 16 channels of TTL compatible digital output 1 2 Features The maximum sample rate of the A D converter is about 30 K sample sec Software selective input ranges PC AT compatible ISA bus A D trigger mode software trigger pacer trigger 8 single ended analog input channels Programmable gain 1 2 4 8 16 Input range 5 V 2 5 V 1 25 V 10 625 V 0 3125 V output channel 12 bit D A voltage output 0 5 V or 0 10 V 16 digital inputs 16 digital outputs TTL compatible Interrupt handling OME A 8111 Hardware Manual ver 1 1 Jul 2003 4 1 3 Specifications 1 3 1 Power Consumption 5V 300 mA maximum 12 60 mA maximum 12V 30 mA maximum Operating temperature 0 C 50 1 3 2 Analog Inputs Channels 8 single ended Input range software programmable Bipolar 5 V 2 5 V 1 25 V 0 625 V 0 3125 V Input current 250 nA max 125 nA typical at 25 C On chip sample and hold Over voltage continuous single channel to 70V p 13 3 A D Converter Type successive approximation Burr Brown ADS 774 Conversion time 8 u sec Accuracy 1 bit Resolution 12 bit OME A 8111 Hardware Manual
17. ocouple RTD amp Thermistor A Calibrators amp Ice Point References A Recorders Controllers amp Process Monitors A Infrared Pyrometers PRESSURE STRAIN AND FORCE 4 Transducers amp Strain Gages A Load Cells amp Pressure Gages 4 Displacement Transducers A Instrumentation amp Accessories FLOW LEVEL 4 Rotameters Gas Mass Flowmeters amp Flow Computers A Air Velocity Indicators A Turbine Paddlewheel Systems A Totalizers amp Batch Controllers pH CONDUCTIVITY A pH Electrodes Testers amp Accessories A Benchtop Laboratory Meters 4 Controllers Calibrators Simulators amp Pumps 4 Industrial pH amp Conductivity Equipment DATA ACQUISITION A Data Acquisition amp Engineering Software 4 Communications Based Acquisition Systems 4 Plug in Cards for Apple amp Compatibles A Datalogging Systems A Recorders Printers amp Plotters HEATERS 4 Heating Cable A Cartridge amp Strip Heaters A Immersion amp Band Heaters WF Flexible Heaters 4 Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL 4 Metering amp Control Instrumentation 4 Refractometers 4 Pumps amp Tubing A Air Soil amp Water Monitors A Industrial Water amp Wastewater Treatment A pH Conductivity amp Dissolved Oxygen Instruments M4029 0104
18. partment will issue an Authorized Return AR number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OMEGA s control Components which wear are not warranted including but not limited to contact points fuses and triacs OMEGA is pleased to offer suggestions on the use of its various products However OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA either verbal or written OMEGA warrants only that the parts manufactured by it will be as specified and free of defects OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER EXPRESS OR IIVIPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY
19. rigger Mode The block diagram of the pacer timer is shown in section 2 6 The pacer timer can give very precise sampling rates OME A 8111 Hardware Manual ver 1 1 Jul 2003 22 2 7 3 A D Transfer Modes 8111 supports two transfer modes 1 2 polling transfer This mode can be used with all trigger modes Detailed information is given in section 2 4 8 The software scans A D high byte data register 5 until READY BIT 0 The low byte data is also ready in BASE 4 interrupt transfer This mode can be used with pacer trigger or external trigger Detailed information is given in section 2 4 8 The user can set the IRQ level by register mode A hardware interrupt signal is sent to the PC when an A D conversion is completed 2 7 4 Using software trigger and polling transfer If the user needs to directly control the A D converter without the OME A 8111 software driver it is recommended to use software trigger and polling transfer The program steps are listed as below MEE UE iud Send 0x01 to A D mode control register software trigger polling transfer refer to sec 2 4 8 Send channel number to multiplexer control register refer to sec 2 4 7 Send the gain control code value to gain control register refer to sec 2 4 6 Delay the settling time refer to sec 2 4 6 and sec 2 4 6 Send any value to the software trigger control register in order to generate a software rigger signal ref
20. s All levels are TTL compatible The connections diagram and block diagram are given below Output Latch Register 16 Channel Isolated Output Latch Register Input Board Option OME A 8111 gister 8111 Input Buffer Register 16 Channel Isolated Input Board Option OME A 8111 Hardware Manual 1 1 Jul 2003 19 2 6 8254 Timer Counter The 8254 Programmable timer counter has 4 registers from Base 0 through Base 3 For detailed programming information about 8254 please refer to Intel s Microsystem Components Handbook The block diagram is as below Cin Cout Counter 0 PACER CLK Cin clock input Cout clock output Counter 1 Qvcc INTCLK internal clock Counter 2 INTCLK Counter0 counter and counter2 are all 16 bit counters Counter 1 and counter 2 cascade as a 32 bit timer The 32 bit timer is used as a pacer timer OME A 8111 Hardware Manual ver 1 1 Jul 2003 20 2 7 AID Conversion This section explains how to perform A D conversions The A D conversion can be performed by software trigger by pacer trigger At the end of the A D conversion it is possible to transfer data by polling and interrupt before using the A D conversion function users should notice the following issues A D data register BASE 4 BASE 5 stores the A D conversion data sec 2 4 2 A D gain control register BASE 9 select gain sec 2 4 6 Te e A D multiplex control register BASE A sele
21. se Base Base O 2 3 4 5 6 7 8 9 A B D EE 8254 Counter 2 8254 Counter 2 8254 Counter Control A D Low Byte D A Channel 0 Low Byte A D High Byte D A Channel 0 High Byte DI Low Byte Reserved DI High Byte Reserved Bases Reserved Clear Interrupt Request Reserved Gain Control Reserved Multiplexer Control Reserved Mode Control A D Software Trigger Control Reserved DO Low Byte Reserved DO High Byte Reserved Reserved OME A 8111 Hardware Manual ver 1 1 Jul 2003 11 2 4 4 The 8254 Counter The 8254 Programmable timer counter has 4 registers from Base 0 through Base 3 For detailed programming information about the 8254 please refer to Intel s Microsystem Components Handbook Baset0 8254 Counter 0 8254 Counter 0 Basel 8254 Counter 1 8254 Counter 1 Base 2 8254 Counter 2 8254 Counter 2 Baset3 Reserved 8254 Counter Control 2 4 2 A D Input Buffer Register READ Base 4 A D Low Byte Data Format C ES READ Base 5 A D High Byte Data Format ps A D 12 bit data D11 D0 D11 MSB DO LSB READY I A D 12 bits data not ready 0 A D 12 bits data is ready The low 8 bits of A D data are stored in address BASE 4 and the high 4 bits of data stored in address BASE 5 The READY bit is used as an indicator for A D conversion When a A D conversion is completed the READY
22. t Request Format X don t care any 8 bit data is valid If OME A 8111 is working in the interrupt transfer mode an on board hardware status bit will be set after each A D conversion This bit must be cleared by the software before next hardware interrupt Writing any value to address BASE 8 will clear this hardware bit and the hardware will generate another interrupt when next the A D conversion is completed 2 4 6 A D Gain Control Register WRITE 9 A D Gain Control Register Format The OME A 8111 provides a gain factor of 1 2 4 8 16 The gain controls register control the gain of the A D input signal Bipolar Unipolar will affect the gain factor NOTE If the gain control code is changed the hardware needs to have extra gain settling time The gain settling time is different for different gain control code The software driver does not monitor the gain settling time so the user needs to delay the ain settling time if the gain changed OME A 8111 GAIN CONTROL CODE TABLE GAIN Range GAIN2 GAINI GAINO jSettling Time EC 25v o 125v EX 0 0625 16 0 03125 Ee 1 2 4 16 OME A 8111 Hardware Manual 1 1 Jul 2003 14 2 4 7 AID Multiplex Control Register WRITE A D Multiplexer Control Register Format x k x k k po A D input channel selection data 3 bits D2 D0 D2 MSB D0 LSB
23. ut S TTL 10 Digital Input 9 TTL 11 Digital Input 10 TTL 12 Digital Input 11 TTL 13 Digital Input 12 TTL 14 Digital Input 13 TTL 15 Digital Input 14 TTL 16 Digital Input 15 17 PCB s GND output 18 PCB s GND output 19 PCB s 5 output 20 STROBE CN3 Analog input Analog output Connect Pin Assignment Pin Number Description Pin Number Description 1 Digital output O TTL 2 Digital output 1 TTL 3 Digital output 2 TTL 4 Digital output 3 TTL 5 Digital output 4 TTL 6 Digital output 5 TTL 7 Digital output 6 TTL 8 Digital output 7 TTL 9 Digital output S TTL 10 Digital output 9 TTL 11 Digital output 10 TTL 12 Digital output 11 TTL 13 Digital output 12 TTL 14 Digital output 13 TTL 15 Digital output 14 TTL 16 Digital output 15 TTL 17 PCB s GND output 18 PCB s GND output 19 PCB s 5 output 20 PCB s 12 output OME A 8111 Hardware Manual ver 1 1 Jul 2003 27 2 11 Daughter Board The OME A 8111 can be connected with many different daughter boards The function of these daughter boards is described as follows 2 11 1 4002 The OME CA 4002 is 37 pin D Sub male connector It can directly connect to a 37 pin D sub connector 2 11 2 OME DB 16P The OME DB 16P is a 16 channel isolated digital input board The OME A 8111 provides a 16 channel non isolated TTL compatible digital inputs from CN2 If connecting to the OME DB 16P the OME A 8111 can provide 16 chann
24. ware Configuration 8 2 1 Board Layout 8 2 2 T O Base Address Setting 9 2 3 Jumper Setting 10 2 3 1 JP1 D A Internal Reference Voltage Selection 10 2 4 I O Register Address 11 2 4 1 The 8254 Counter 12 2 4 2 A D Input Buffer Register 12 2 4 3 D A Output Latch Register 13 2 4 4 D I Input Buffer Register 13 2 4 5 Clear Interrupt Request 14 2 4 6 A D Gain Control Register 14 2 4 7 A D Multiplex Control Register 15 2 4 8 A D Mode Control Register 16 2 4 9 A D Software Trigger Control Register 17 2 4 10 D O Output Latch Register 18 2 5 Digital I O 19 2 6 8254 Timer Counter 20 2 7 A D Conversion 21 2 7 1 A D conversion flow 22 OME A 8111 Hardware Manual ver 1 1 Jul 2003 2 7 2 A D Conversion Trigger Modes 22 2 7 3 A D Transfer Modes 23 2 7 4 Using software trigger and polling transfer 2 8 D A Conversion 2 9 Analog Input Signal Connection 2 40 Pin Assignment 2 4 Daughter Board 23 24 25 26 28 28 28 28 28 2 11 1 OME CA 4002 2 11 2 OME DB 16P 2 11 3 OME DB 16R 2 11 4 OME DB 37 Calibration 3 1 Calibration VR Description 3 2 D A Calibration Steps 3 3 A D Calibration Steps 3 4 DI O Testing OME A 8111 Hardware Manual ver 1 1 Jul 2003 29 29 30 30 30 1 Introduction 1 1 General Description The OME A 8111 is a high performance multifunction analog and digital I O board for the PC AT compatible computer with the ISA bus The OME A 8111 provides progra
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