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DM300/DM5300 User`s Manual - RTD Embedded Technologies, Inc.

1. External gate or always enabled DM300 DM5300 dataModule A 3 RTD Embedded Technologies Inc DM5300 Characteristics Miscellaneous Inputs Outputs PC bus sourced 5 volts 12 volts ground Current Requirements DMB53900 zi sie dentem eode Be eed harden ren ten deb ee 440 mA 5 volts DMS3900 e ntes 22190 ma 5 volts 42 ma 12 volts 32 ma 12 volts Connector 50 pin right angle header Environmental Operating temperature 0 to 70 C Storage temperature 40 to 85 C H midity 2 teret eet ERR 0 to 90 non condensing Size 3 55 L x 3 775 W x 0 6 H 90mm x 96mm x 16mm DM5300 A D Conversion Resolution 1 MHz System Clock RESOLUTION CONVERSION TIME FREQUENCY 10 bits 2 048 msec 488 28 Hz 11 bits 4 096 msec 244 14 Hz 12 bits 8 192 msec 122 07 Hz 13 bits 16 384 msec 61 04 Hz 14 bits 32 768 msec 30 52 Hz 15 bits 65 536 msec 15 26 Hz 16 bits 131 072 msec 7 63 Hz 17 bits 262 144 msec 3 81 Hz 18 bits 524 288 msec 1 90 Hz DM300 DM5300 dataModule A 4 RTD Embedded Technologies Inc B P2 CONNECTOR PIN ASSIGNMENTS DM300 DM5300 dataModule B 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule B 2 RTD Embedded Technologies Inc Appendix 2 Connector Pin Assignments P2 Connector DIFF S E DIFF S E AIN1 AIN1 AIN1 AIN9 AIN2
2. re em ecd 4 11 Programming the 8254 Timer ciis tr ee o Hr rta e ra tpe aree GCaD 4 11 Initializing the 8255 eR EN E UAR E RENE NUR VERF NEED REMANERE Hyd 4 12 Clearing the Board n eroe ee 4 13 Setting the 4 13 Setting the GAIN cootra rb tute etie eee 4 13 Conversion onte eate etm te ture 4 14 single Convert Mode nite d RE Sn OD OR Eb 4 14 Continuous Convert Mode 2 APSARA oe SRS Anc e aA te e Ee 4 16 Cascading ognpeniunea ou eere bee e e ER ERE REGERE 4 18 Reading the Converted Data io oett GG GI RG 4 19 D A COnvVetSIODS s eH eet eon mt teintes EDI T 4 19 User Available 8254 Timer Counter xti dieti tee diu 4 21 Digital i ete Ure SEHR PEE ET RR REED ER etr e ER 4 22 Inu P 4 22 Example Programs dep ER d at rr e 4 23 C and Pascal Programs cn ccc AN esd tei a PEE e eh Re a ae 4 23 BASIC Programs ie Het oh ERU RE OUR EROR ga ssbabssessesspeosadosas 4 23 CHAPTER 5 CALCULATING FREQUENCIES VOLTAGES AND BITS 5 1 Calculating the Settings for th 8254 Timer oce tero t eee eee EEEE Eee teste 5 3 Binary Calculations yen ep ete 5 3 Decimal Calc latioris eere tene eee
3. Calculating the Settings for the 8254 Timer For 5 volt Input Ranges Sey ED Resolution Decimal Hex Decimal Hex Decimal Hex Decimal Hex 10 uV 208 DO 7 07 243 1 01 For 10 volt Input Ranges Ponit 3 un 2 3 Resolution Decimal Hex Decimal Hex Decimal Hex Decimal Hex DM300 DM5300 dataModule 5 6 RTD Embedded Technologies Inc Chapter 5 Calculating Frequencies Voltages and Bits Conversion Results and Correction Factor For each conversion when you count the output of the V F converter you increment a 20 bit counter by one for each pulse counted For example let s program the timer to open the gate for the counter for a period of 131 072 milliseconds We read the data from the counter in three 8 bit words ADLB low byte ADMB middle byte and ADHB high byte To find the true fre quency represented by the count you calculate True Frequency ADLB ADMB x 256 ADHB x 65536 x CF where CF is the correction factor After performing the multiplication by the bit weight for each of the three bytes read you must then multiply the result by CF the correction factor in order to find the true frequency of the signal you measured The correction factor is the inverse of the amount of time you had the counter gated open for counting CF 1 Gate Time For example if you count a 10 Hz signal for second your count would be 10 This is mult
4. DM5300 CONNECTOR P2 Fig 2 3 Differential Input Connections Connecting the Trigger In and Trigger Out Pins Cascading Modules The DM5300 has an external trigger input P2 39 and output P2 43 so that two or more modules can be cascaded and run synchronously in a master slave configuration By cascading two or more modules as shown in Figure 2 5 they can be triggered to start an A D conversion at the same time Note that when using the external trigger output P2 43 such as on the master module in Figure 2 4 you must set the jumper on P3 to TRIG If you apply an external trigger to the module s trigger in pin note that the trigger can be negative or positive going The pulse duration should be at least 100 nanoseconds When using the TRIG GER OUT the pulse must always be positive going DM300 DM5300 dataModule 2 5 RTD Embedded Technologies Inc External Connections DM5300 CONNECTOR BOARD 1 MASTER P2 1 1 2 43 ENA DYN END EN Soke pecus pue O O O BOARD 2 SLAVE SIGNAL P2 1 CH 1 SOURCE 2 our P2 2 CH 1 TOK P2 39 TRIGGER IN Fig 2 4 Cascading Two Modules for Simultaneous Sampling Connecting the Analog Outputs For each of the two D A outputs connect the high side of the device receiving the output to the AOUT channel P2 1
5. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE D 3 RTD Embedded Technologies Inc 103 Innovation Blvd State College PA 16803 0906 USA Our website www rtd com D 4 DM5300 Board User Selected Settings Base I O Address
6. rper re oci epe eere dp tese eee cons egt bees 5 5 Conversion Results and Correction Factor 5 7 Input Voltages and Output Frequencies ix iet irre 5 8 Input Voltage 5 peret E E He eeepc eter db Dente et EOD YGGD 5 0 Bit Calculations inert mter eet eec ree 5 9 DM300 DM5300 dataModule ii RTD Embedded Technologies Inc CHAPTER 6 CALTIBRA TTON YY yn dduU CN 6 1 Required Equipment a A aime TAI o RO AGA ID RD FIN BATIO 6 3 MIF Calibration e GG the eo Gre re 6 3 D A Cahbr tion GYF Y GG GN E RA REI REV 6 4 APPENDIX A DM5300 SPECIFICATIONS 1 APPENDIX B P2 CONNECTOR PIN ASSIGNMENTS ccssssssssscescesscsssscsssscssessesscescsssssnerees B 1 APPENDIX COMPONENT DATA C 1 APPENDIX D WARRANTY eeeeeee esee sees etas ta reassess setas ses sene D 1 DM300 DM5300 dataModule iii RTD Embedded Technologies Inc DM300 DM5300 dataModule iv RTD Embedded Technologies Inc 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 2 1 2 2 2 3 2 4 3 1 3 2 3 3 4 1 4 2 4 3 4 4 4 5 4 6 6 1 LisT OF ILLUSTRATIONS Module Layout Showing Factory Config
7. 15 NOTE The above example is for both single and continuous conversions Note that you must always subtract 1 from the value you load into timer 1 in order to have an accurate count This is done to compensate for how the 8254 handles single countdown operations for cascaded timers In the continuous mode the sampling rate is determined by fs 1 gate time service time As you can see the timing calculations can be somewhat complex The formulas for calculating the counts to load into the timers are given in Chapter 5 Chapter 5 also provides tables and formulas for decimal counts These are helpful for voltage based resolutions such as a resolution of 100 microvolts Here you can refer to the following table to help you determine the count to be loaded into the timers for bit based resolutions DM300 DM5300 dataModule 4 11 RTD Embedded Technologies Inc A D Conversions eoe E mun Resolution Decimal Hex Decimal Hex Decimal Hex Timer 1 MSB Decimal Hex 0 00 1 01 3 03 7 07 15 OF 31 1F 63 3F This chapter s final example for the 8254 timer is a portion of an initialization program written in BASIC which shows you how to set up the 8254 timers 0 and 1 so that they open the conversion counter for a time period of 131 072 milliseconds giving you a 16 bit resolution with a 1 MHz system clock The timer 1 divider is 4095 In this example TWC stands for the 8254 control register which is addr
8. 5 5 0 to 10 or 10 volts Two jumpers must be installed one to select the range and one to select the multiplier The first two positions select the range bipolar 5 or unipolar 5 The next two positions select the multiplier X2 or X1 When a jumper is on the X2 multiplier pins the range values become 10 and 10 The table below shows the four possible combinations of jumper settings This header does not have to be set the same as P8 S1 Base Address Factory Setting 300 hex 768 decimal One of the most common causes of failure when you are first trying your module is address contention Some of your computer s I O space is already occupied by internal I O and other peripherals When the DM5300 attempts to use I O address locations already used by another device contention results and the module does not work Table 1 2 Base Address Switch Settings S1 Base Address Switch Setting Base Address Switch Setting Decimal Hex 4321 Decimal Hex 4321 512 200 1000 544 220 1001 576 240 1010 608 260 1011 640 280 1100 672 1101 704 1110 736 280 1111 0 Closed 1 Open Fig 1 10 Base Address Switch S1 DM300 DM5300 dataModule 1 8 RTD Embedded Technologies Inc Chapter 1 Module Settings To avoid this problem the DM5300 has an easily accessible four position DIP switch 51 which lets you select any one of 16 starting addresses in the computer s I O Should
9. In the external trigger mode a conversion can be started on the rising or falling edge of the trigger depending on the setting of bit 1 Bit 3 sets the interrupt source see the discussion about J4 on page 1 10 Bit 4 can be used to start a conversion in internal trigger mode In the single conversion mode only one measurement is taken In the continuous mode after the start the board is continuously converting To stop continuous conversions program the conver sion mode to single at BA 20 Software Trigger Trigger Select 1 start convert 0 external trigger internal trigger 1 internal trigger External Trigger Polarity 0 start convert on rising edge 1 start convert on falling edge IRQ Select 0 EOC 1 TRIGGER IN BA 22 Reset Update DACs Read Write A read resets the module The data written is irrelevant A write simultaneously updates the two D A outputs with the latched data If the data written to either channel has not been updated since the last conversion the output of the corresponding DAC will not change DM300 DM5300 dataModule 4 10 RTD Embedded Technologies Inc Chapter 4 Module Operation and Programming A D Conversions Before you can start taking A D conversions you must clear the 20 bit counter and program the 8254 timer The software provided with your board contains example programs for module initialization You can monitor the conversion status using the end of convert bit at I
10. ee Eo eoe oe Un de nS 3 5 a metr C oUnters i RE e reet eee e e ete ea Ct teme v pie e eoo IRAE Hee 3 5 Digital I O Programmable Peripheral Interface 3 6 Intetrupts ee eet een P Re ERR tended a e epe ete b anms 3 7 DM300 DM5300 dataModule i RTD Embedded Technologies Inc CHAPTER 4 MODULE OPERATION AND PROGRAMMING ccsssssssssssssssssscssssseseeseees 4 1 Defining the T O Map mdr ea eee t eae e t Re 4 3 BA 0 A D Data Low Byte Read Only tene eet te rei er free ot dden 4 4 1 A D Data Middle Byte Read 4 4 BA t2 A D Data High Byte Read Only neto etie nte pepe he Sie 4 4 3 Board Ready Clear 20 bit Conversion Counter Read Write sese 4 4 BA 4 8254 Timer Counter 0 Read Write ccccsceessecsssseecssceceesseecssseeecseeeceesaeecsesaeecseeeeesaeecseeeesseaeeess 4 4 5 8254 Timer Counter 1 Read Write 4 5 6 8254 Timer Counter 2 Read Write esses entren 4 5 BA 7 8254 Control Word Write Only tenen nest tren retener en 4 5 8 PPI Port A Digital I O Read Write esee enne entente nee enne ennt tenere 4 5 BA 9 PPI Port B Channel Gain
11. 2 6 DM5300 Block Diagram eie enitn Ea e erret it 3 3 V F Timing and Counting Block Diagram eese enne ener nennen 3 4 User 8254 Timer Counter i E oerte ERIS 3 6 Single Convert Mode Timing Diagram 4 14 Single Convert Mode Blow Diagram eie ee et ee dte eve re Ro 4 15 Continuous Convert Mode Timing Diagram eese nennen nennen nennen 4 16 Continuous Convert Mode Flow Diagram eese nennen nennen nennen nennen eene erret 4 17 Cascaded Boards Single Convert Mode Flow Diagram eese 4 18 User 8254 Timer Counter Circuitry 4 21 Module Layout eite ret AO b aie YN ee tete e E EUR E I Ere edant 6 3 DM300 DM5300 dataModule v RTD Embedded Technologies Inc DM300 DM5300 dataModule vi RTD Embedded Technologies Inc INTRODUCTION DM300 DM5300 dataModule i l RTD Embedded Technologies Inc DM300 DM5300 dataModule i 2 RTD Embedded Technologies Inc Introduction The DM5300 variable resolution integrating analog dataModule turns your PC XT AT compatible cpuModule or other PC 104 computer into a high performance data acquisition and control system Ultra compact for embedded and portable applications the DM5300 features 8 differential or 16 single ended analog input channels Resolution to 18 bits using a synchronous vo
12. 5 Calculating Frequencies Voltages and Bits Input Voltage Calculations The general formula for calculating the input voltage when the frequency and voltage range are known is Input Voltage Frequency system clock 2 Voltage Range Offset The offset is O for unipolar voltage ranges and one half the range for bipolar voltage ranges For 0 to 5 volts Input Voltage Frequency 100 000 0 For 0 to 10 volts Input Voltage Frequency 50 000 0 For 2 5 to 2 5 volts Input Voltage Frequency 100 000 2 5 For 5 to 5 volts Input Voltage Frequency 50 000 5 Bit Calculations The general formula for calculating the bit value when the frequency and resolution are known is Bit Value Frequency system clock 2 2 Offset where the number of bits of the desired resolution and the offset is 0 for unipolar operation and 0 5 x 2 for bipolar operation For example to calculate the bit value for a 12 bit resolution Unipolar Bit Value Frequency system clock 2 4096 0 Frequency 122 07 Bipolar Bit Value Freguency system clock 2 4096 2048 Frequency 122 07 2048 For example to calculate the bit value for a 16 bit resolution Unipolar Bit Value Frequency system clock 2 65 536 0 Frequency 7 629 Bipolar Bit Value Frequency system clock 2 65 536 32 768 Frequency 7 629 32 768 DM300 DM5300 dataModule 5 9 RTD Embedded Technologies Inc DM300 DM5
13. I O Connector Pin Assignments Connecting the Analog Input Pins 16 Single Ended When operating in the 16 channel single ended mode P6 S connect the high side of the analog inputs to the analog input channels AIN1 through AIN16 and connect the low side to any of the ANALOG GND pins available at the connector pins 18 20 22 on P2 Ground any unused inputs Figure 2 2 shows how these connections are made DM5300 CONNECTOR P2 SIGNAL alin 1 SOURCE 1 our GND 14 16 22 Fig 2 2 Single Ended Input Connections DM300 DM5300 dataModule 2 4 RTD Embedded Technologies Inc Chapter 2 Module Installation 8 Differential When operating in the differential mode P6 D twisted pair cable is recom mended to reduce the effects of coupling at the input Your signal source may or may not have a separate ground reference When using the differential mode you should install a 10 kilohm resistor pack at RN2 on the board to provide a reference to ground for signal sources without a separate ground reference Connect the high side of the analog input to the selected analog input channel AIN1 through AIN8 and connect the low side to the corresponding AIN pin Then for signal sources with a separate ground reference connect the ground from the signal source to an ANALOG GND pins 18 and 20 22 on P3 Figure 2 3 shows how these connections are made
14. O address location BA 2 When bit 7 of this word is low a conversion is in progress When it goes high the conversion is completed Note that the end of convert line can also be monitored through a software program mable IRQ line if it is enabled Programming the 8254 Timer Two of the 8254 s 16 bit timers are cascaded to form a 32 bit timer which gates the 20 bit conver sion counter The timer is clocked by the same system clock which supplies the V F converter Timer 0 and timer 1 are programmed with the values that will open the conversion gate for the desired time window In the example programs included with your module timer 0 is always set at 32 This divides the input frequency of system clock by 32 which produces an output frequency of system clock 32 going into timer 1 For a system clock of 1 MHz this is System 31 250 Hz Clock To set for 32 LSB 32 20 MSB 0 00 Then timer is programmed with the correct divider value to take readings at the desired resolu tion For example if you want a resolution of 16 bits with the system clock programmed to run at 1 MHZ then you must program timer 1 to further divide the output of timer 0 by 4095 This pro duces an output frequency of 7 629 Hz which will open the 20 bit conversion counter gate for 131 072 milliseconds giving you a 16 bit resolution System 7 629 Hz Clock To set for 32 To set for 4095 LSB 32 20 LSB 255 FF MSB 0 00 MSB
15. Triggered Strobe Mode5 Hardware Triggered Strobe Retriggerable These modes are detailed in the 8254 Data Sheet reprinted from Intel in Appendix DM300 DM5300 dataModule 3 5 RTD Embedded Technologies Inc Timer Counters DM5300 CONNECTOR P2 EXTCLK1 EXTCLK2 TIMER l 5V a hs PIN 42 1 EXTGATE1 PIN 46 b EXTGATE2 I oe OUTO OUT1 TIMER TIMER EXTERNAL TRIGGER OUT OUT2 PIN 43 PE our POUT Fig 3 3 User 8254 Timer Counter Circuitry Digital I O Programmable Peripheral Interface The 8255 programmable peripheral interface PPI is used for digital I O functions This high performance TTL CMOS compatible chip has 24 digital I O lines divided into two groups of 12 lines each Group A Port A 8 lines and Port C Upper 4 lines Group B Port B 8 lines and Port C Lower 4 lines Port A and Port C are available at the external I O connector P2 Port B is dedicated to on board functions and is not available for your use You can use the 16 lines of Ports A and C in one of these three PPI operating modes Mode 0 Basic input output Lets you use simple input and output operation for a port Data is written to or read from the specified port Mode Strobed input output Lets you transfer I O data from Port A in conjunction with strobes or handshaking signals Mode 2 Strobed bidirectional input outp
16. is 1 1 second If you count the same 10 Hz signal for 0 5 seconds your count would be 5 This is multiplied by a correction factor of 2 1 0 5 seconds which again gives you the true frequency of 10 Hz Counting 10 Hz for 2 seconds gives you a count of 20 which is then multiplied by a correction factor of 0 5 1 2 seconds for a result of 10 Hz In contrast a more complex example is counting for 131 072 milliseconds a 16 bit resolu tion The correction factor is 1 131072 or 7 629 D A Conversions The two D A converters can be individually programmed to convert 12 bit digital words into a voltage in the range of 5 10 0 to 5 or 0 to 10 volts DACI is programmed by writing the 12 bit digital data word to BA 8 and BA 9 DAC2 is identical with the data word written to BA 10 and BA 11 The DACs are updated by writing to BA 22 The following tables list the key digital codes and corresponding output voltages for the D A converters DM300 DM5300 dataModule 4 19 RTD Embedded Technologies Inc D A Conversions 56 64 32 4 2 1 D A Converter Bipolar Calibration Table Ideal Output Voltage in millivolts DIA Bit Weight sov 4095 Max Output 4997 6 9995 1 2048 Oo 0 0 1024 2500 0 5000 0 512 3750 0 7500 0 4375 0 8750 0 256 128 33750 64 96875 32 9843 8 4 2 1 A o EXE 99009 99805 99902 9995 5000 0 10000 0 DM300 DM5300 dataModule 4 20 RTD Embedded Te
17. of 82 52 hex to indicate that the BA is set properly A write clears the 20 bit conversion counter and flags The data written is irrelevant BA 4 8254 Timer Counter 0 Read Write Two reads show the count in the timer counter and two writes load the counter timer with a new 16 bit value LSB followed by MSB The timer counter must be loaded in two 8 bit steps Count ing begins as soon as the MSB is loaded This timer counter cascaded with timer counter 1 to form a 32 bit timer generates the module s internal pacer clock which controls measurements and starts and stops conversions DM300 DM5300 dataModule 4 4 RTD Embedded Technologies Inc Chapter 4 Module Operation and Programming BA 5 8254 Timer Counter 1 Read Write Two reads show the count in the timer counter and two writes load the counter timer with a new 16 bit value LSB followed by MSB The timer counter must be loaded in two 8 bit steps Count ing begins as soon as the MSB is loaded This timer counter cascaded with timer counter 0 to form a 32 bit timer generates the module s internal pacer clock which controls measurements and starts and stops conversions BA 6 8254 Timer Counter 2 Read Write Two reads show the count in the timer counter and two writes load the counter timer with a new 16 bit value LSB followed by MSB The timer counter must be loaded in two 8 bit steps Count ing begins as soon as the MSB is loaded This timer counter wi
18. standard time or eastern daylight time or send a FAX requesting assistance to 814 234 5218 When sending a FAX request please include your company s name and address your name your telephone number and a brief description of the problem DM300 DM5300 dataModule i 5 RTD Embedded Technologies Inc DM300 DM5300 dataModule i 6 RTD Embedded Technologies Inc Cuarter 1 MODULE SETTINGS The DM5300 has jumper and switch settings you can change if necessary for your application The module is factory configured as listed in the table and shown on a diagram in the beginning of this chapter Should you need to change these settings use these easy to follow instructions before you install the module in your system Note that by installing jumpers in the associated pads you can configure the 16 available digital I O lines to be pulled up or pulled down This procedure is explained near the end of this chapter Also note that by installing resistive components you can add your own gain multiplier for the software programmable binary gains of 1 2 4 and 8 The gain multiplier circuitry is described at the end of this chapter DM300 DM5300 dataModule 1 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule 1 2 RTD Embedded Technologies Inc Chapter 1 Module Settings Factory Configured Switch and Jumper Settings Table 1 1 lists the factory settings of the user configurable switch and jumpers on the DM5300 Figure 1
19. the I O Channel Gain 00 x1 01 x2 10 x4 11 x8 BA 10 PPI Port C Digital I O Read Write Analog Input 4 Channel Select 0000 channel 1 0001 channel 2 0010 channel 3 0011 channel 4 0100 channel 5 0101 channel 6 0110 channel 7 0111 channel 8 1000 channel 9 1001 channel 10 1010 channel 11 1011 channel 12 1100 channel 13 1101 channel 14 1110 channel 15 1111 channel 16 Transfers the two 4 bit Port C digital input and digital output data groups Port C Upper and Port C Lower between the board and an external device A read transfers data from the external device through P2 and into PPI Port C a write transfers the written data from Port C through P2 to an external device BA 11 8255 PPI Control Word Write Only When bit 7 of this word is set to 1 a write programs the PPI configuration The PPI must be programmed so that Port B is a Mode 0 output port as shown below X don t care Mode Set Flag 1 active Mode Select 00 mode 0 01 mode 1 10 2 mode 2 DM300 DM5300 dataModule Port A 0 output 1 input Port C Upper 0 output 1 input 4 6 SS S SS SS 7 Port Lower 0 output 1 input Port B 0 output 1 input Mode Select 0 mode 0 1 mode 1 Group B i yu DY RTD Embedded Technologies Inc Chapter 4 Module
20. the factory setting of 300 hex 768 decimal be unsuitable for your system you can select a different base address simply by setting the switches to any one of the values listed in Table 1 2 The table shows the switch settings and their corresponding decimal and hexadecimal in parentheses values Make sure that you verify the order of the switch numbers on the switch 1 through 4 before setting them When the switches are pulled forward they are OPEN or set to logic 1 as labeled on the DIP switch package When you set the base address for your module record the value in the table inside the back cover Figure 1 10 shows the DIP switch set for a base address of 300 hex 768 decimal Pull up Pull down Resistors on Digital I O Lines The 8255 programmable peripheral interface provides 16 TTL CMOS compatible digital I O lines which can be interfaced with external devices These lines are divided into three groups eight Port A lines four Port C Lower lines and four Port C Upper lines The eight lines of Port B are used for internal board functions You can connect pull up or pull down resistors for any or all of these three groups of lines You may want to pull lines up for connection to switches This will pull the line high when the switch is disconnected Or you may want to pull lines down for connection to relays which control turning motors on and off These motors turn on when the digital lines controlling them are high The Port A lines
21. 1 shows the module layout and the locations of the factory set jumpers The following paragraphs explain how to change the factory settings Table 1 1 Factory Settings Switch Jump Function Controlled Factory Settings P3 Sets the user timer counter output signals P2 43 TRIG P2 44 OUTO available at P2 43 and P2 44 Sets the clock sources for the user CLK0 OSC CLK1 OTO timer counters CLK2 OT1 cascaded Sets the gate sources for the user GATEO0 45V GATE1 5V timer counters GATE2 5V Sets the analog input as 16 single ended or 8 16 single ended 3 differential jumpers installed on S pins Sets the analog input voltage range 5V BI 2 5 to 2 5 volts polarity Sets the D A output voltage range for DAC 1 5 X1 5 to 5 volts Sets the D A output voltage range for DAC 2 5 X1 5 to 5 volts Sets the base address 300 hex 768 decimal J4 Connects TRIGGER IN P2 39 or TRIGGER IN P2 39 TIMER COUNTER 2 out 2 to EPLD trigger input S1 BASE ADDRESS TR2 TRi TR3 R11 RIO TR5 O essen noo ooooooon 000 a 018 00000000 0000000000 R1 R13 00000000 00000000000D HI 508A cH HE EE EE EL ES L nnn niin rM E U5 U4 82 54 Fig 1 1 Module Layout Showing
22. 2 user TIMER COUNTER OUT2 This jumper is used in conjunction with the trigger and interrupt mode set in the register at BA 21 For example if you would like to use an external signal to trigger the conversion you would connect your trigger signal to P2 39 set jumper J4 for TR and program the trigger select at BA 21 bit DO for External Trigger If you would like to use this timer counter to trigger the conversions you would set J4 for O2 and program the trigger select for External Trigger If you would like to use internal triggering but use the timer to generate interrupts you would set J4 for O2 and program the trigger register to internal triggering and the IRQ select to External Trigger Gm Gain Multiplier Circuitry The DM5300 has software programmable binary gains of 1 2 4 and 8 A gain multiplier circuit Gm is provided so that you can easily configure special gain settings for a specific application Note that when you use this feature and set up the module for a gain of other than 1 all of the input channels will operate only at your custom gain settings In other words if you install circuitry which gives you a gain multiplier of 10 then the four programmable gains available are 10 20 40 and 80 Gm is derived by adding resistors R10 and R11 and trimpot TR3 all located in the upper center area of the module The resistors and trimpot combine to set the gain as shown in the diagram and formula in Figure 1 13 As sho
23. 300 dataModule 5 10 RTD Embedded Technologies Inc CHAPTER 6 CALIBRATION This chapter tells you how to calibrate the DM5300 using the 5300DIAG diagnostics program included in the example software package and the four trimpots on the board These trimpots cali brate the V F converter gain and offset and the D A circuitry Calibration is necessary whenever you change the analog input voltage range and or polarity DM300 DM5300 dataModule 6 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule 6 2 RTD Embedded Technologies Inc Chapter 6 Calibration This chapter tells you how to calibrate the V F converter gain and offset and the D A converter X2 multiplier The offset and full scale performance of the board s V F converter is factory calibrated for 2 5 volts If you change the range and or polarity you must recalibrate your module Any time you suspect inaccurate readings you can check the accuracy of your conversions using the procedure below and make adjustments as necessary Calibration is done with the module installed in your system You can access the trimpots at the edge of the module Power up the system and let the module circuitry stabilize for 15 minutes before you start calibrating Required Equipment The following equipment is required for calibration 5300DIAG Diagnostics Program included with example software Precision Voltage Source 10 volts Digital Voltmeter 5 1 2 digits Small S
24. 7 or P2 19 and connect the low side of the device to an ANALOG GND P2 18 or P2 20 Connecting the Timer Counters and Digital I O For all of these connections the high side of an external signal source or destination device is connected to the appropriate signal pin on the I O connector and the low side is connected to any DIGITAL GND Running the 5300DIAG Diagnostics Program Now that your module is ready to use you will want to try it out An easy to use menu driven diagnostics program 5300DIAG is included with your example software to help you verify your module s operation You can also use this program to make sure that your current base address setting does not contend with another device DM300 DM5300 dataModule 2 6 RTD Embedded Technologies Inc DM300 DM5300 dataModule 3 HARDWARE DESCRIPTION This chapter describes the features of the DM5300 hardware The major circuits are the A D which consists of the V F converter and associated timing and counting the D A and the digital I O lines Three timer counters from the user 8254 are available at the I O connector for your use Module interrupts are also described in this chapter 3 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule 3 2 RTD Embedded Technologies Inc Chapter 3 Hardware Description The DM5300 has three major circuits the A D which consists of the V F converter and associated timing and counting the D A and the digita
25. AIN2 AIN2 AIN10 AIN3 AIN3 AIN11 4 AINA AIN4 AIN12 PIN2 AIN4 AIN5 AINS AIN13 AIN6 AING AING AIN14 7 AIN7 7 AIN15 LL AIN8 AIN8 AIN8 AIN16 AOUT 1 ANALOG GND PIN 1 AOUT 2 ANALOG GND E ANALOG GND ANALOG GND 7 PC7 E PC6 E PAS PC5 4 4 PC3 2 PC2 E PA1 PC1 PCO za PIN 50 TRIGGER IN DIGITAL GND EXT CLK1 EXT GATE1 TRIGGER OUT OUT2 OUTO OUT1 EXT CLK2 EXT GATE2 412 VOLTS 5 VOLTS PIN 49 12 VOLTS DIGITAL GND Mating Connector Part Numbers DM300 DM5300 dataModule B 3 RTD Embedded Technologies Inc DM300 DM5300 dataModule B 4 RTD Embedded Technologies Inc COMPONENT DATA SHEETS DM300 DM5300 dataModule C 1 RTD Embedded Technologies Inc Intel 82 54 Programmable Interval Timer Data Sheet Reprint 8255 Programmable Peripheral Interface Data Sheet Reprint APPENDIX D WARRANTY AND RETURN POLICY Return Policy If you wish to return a product to the factory for service please follow this procedure Read the Limited Warranty to familiarize yourself with our warranty policy Contact the factory for a Return Merchandise Authorization RMA number Please have the following available Complete board name Board serial number A detailed description of the board s behavior List the name of a contact person fami
26. BUSE such as use of incorrect input voltages improper or insufficient ventilation failure to follow the operating instructions that are provided by RTD Embedded Technologies acts of God or other contingencies beyond the control of RTD Embedded Technologies OR AS A RESULT OF SERVICE OR MODIFICATION BY ANYONE OTHER THAN RTD Embedded Technologies EXCEPT AS EXPRESSLY SET FORTH ABOVE NO OTHER WAR RANTIES ARE EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND RTD Embedded Technologies EXPRESSLY DISCLAIMS ALL WARRANTIES NOT STATED HEREIN ALL IMPLIED WARRANTIES INCLUDING IMPLIED WARRANTIES FOR MECHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE DURATION OF THIS WARRANTY IN THE EVENT THE PRODUCT IS NOT FREE FROM DE FECTS AS WARRANTED ABOVE THE PURCHASER S SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVIDED ABOVE UNDER NO CIRCUMSTANCES WILL RTD Embedded Technologies BE LIABLE TO THE PURCHASER OR ANY USER FOR ANY DAMAGES INCLUD ING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES EXPENSES LOST PROFITS LOST SAVINGS OR OTHER DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS AND SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU
27. DM300 DM5300 User s Manual TD RTD Embedded Technologies Inc Real Time Devices Accessing the Analog World amp BDM 610010021 Rev A 1509001 and AS9100 Certified DM300 DM5300 User s Manual RTD Embedded Technologies INC 103 Innovation Blvd State College PA 16803 0906 Phone 1 814 234 8087 FAX 1 814 234 5218 E mail sales rtd com techsupport rtd com web site http www rtd com Revision History Rev A New manual naming method Published by RTD Embedded Technologies Inc 103 Innovation Blvd State College PA 16803 0906 Copyright 1999 2002 2003 by RTD Embedded Technologies Inc All rights reserved Printed in U S A The RTD Logo is a registered trademark of RTD Embedded Technologies cpuModule and utilityModule are trademarks of RTD Embedded Technologies PhoenixPICO and PheonixPICO BIOS are trademarks of Phoenix Technologies Ltd PS 2 PC XT PC AT and IBM are trademarks of International Business Machines Inc MS DOS Windows Windows 95 Windows 98 and Windows NT are trademarks of Microsoft Corp PC 104 is a registered trademark of PC 104 Consortium All other trademarks appearing in this document are the property of their respective owners TABLE OF CONTENTS INTRODUCTION ees i 1 Amalog to Digital CONVELSION ii i ei reete cr tee eit nte ong e epe eet a eder yN dT Gyn i 3 Digital to Analog Conversion essent enne nennen netten nete
28. Factory Configured Settings DM300 DM5300 dataModule 1 3 RTD Embedded Technologies Inc Factory Configured Switch and Jumper Settings User Timer Counter Output Select Factory Setting P2 43 TRIG P2 44 OUTO This header connector shown in Figure 1 2 lets you select one of two signals to be present at each of two of the P2 I O connector pins P2 43 and P2 44 This allows you more flexibility when setting up the module P2 43 can be configured to provide an external trigger TRIG or the output of user timer counter 2 OUT2 P2 44 can be configured to provide the output of user timer counter 0 OUTO or the output of user timer counter 1 OUT1 Note that when you cascade multiple modules you must configure P2 43 to carry the external trigger signal TRIG on each module that outputs a trigger to the next module in the chain P3 43 TRIG OUT2 P2 OUTO 44 OUT1 Fig 1 2 User Timer Counter Output Select Jumpers P3 P4 User Timer Counter Clock Source Factory Settings CLK0 OSC CLK1 OUT0 CLK2 OUT1 This header connector shown in Figure 1 3 lets you select the clock sources for the user available 8254 timer counters TCO TC1 and TC2 The factory setting cascades all three timer counters with the clock source for TCO being the on board 2 MHz oscillator the output of TCO providing the clock for TC1 and the output of TC1 providing the clock for TC2 You can connect any or all of the sources to either of two exte
29. ION CONVERSION TIME FREQUENCY 10 bits 2 048 msec 488 28 Hz 11 bits 4 096 msec 244 14 Hz 12 bits 8 192 msec 122 07 Hz 13 bits 16 384 msec 61 04 Hz 14 bits 32 768 msec 30 52 Hz 15 bits 65 536 msec 15 26 Hz 16 bits 131 072 msec 7 63 Hz 17 bits 262 144 msec 3 81 Hz 18 bits 524 288 msec 1 90 Hz Binary Calculations To determine the binary value to be loaded into the timer for bit based resolutions you must first calculate what change in the output frequency of the V F converter you must detect in order to achieve your desired resolution Note that the input voltage range is not a factor in bit based calculations Then you must divide the system clock which drives the 8254 the same clock which drives the V F converter down to the value of this change in frequency The result is the value you load into the timer For example let s set up the timer for 16 bit conversions 1 Calculate the amount of change you must discern for 16 bits 216 65 536 which means you must detect a 1 part change in 65 536 to have a resolution of 16 bits 2 Next convert this result into frequency 0 5 MHz full scale with a 1 MHz system clock 500 000 Hz 65 536 7 629394 Hz This means that we must detect a change of 7 629394 Hz out of 0 5 MHz Also note that this frequency 7 629394 Hz is the correction factor see discussion in Conversion Results and Correction Factor section DM300 DM5300 dataModule 5 3 RTD Embedded Technologies Inc Calculati
30. Operation and Programming The table below shows the control words for the 16 possible Mode 0 Port I O combinations The control words which set Port B as an input cannot be used on the DM5300 8255 Port I O Flow Direction and Control Words Mode 0 Control Word Pona Upper pone tower Upper Port B Lower Binary When bit 7 of the PPI control word is set to 0 a write can be used to individually program the Port C lines D7 D5 D2 Do Set Reset Bit Set Reset Function Bit 0 set bit to 0 0 active Bit Select 1 set bit to 1 000 PCO 001 PC1 010 PC2 011 100 4 101 5 110 PC6 111 PC7 DM300 DM5300 dataModule 4 7 RTD Embedded Technologies Inc Defining the I O For example if you want to set Port C bit 0 to 1 you would set up the control word so that bit 7 is O bits 1 2 and 3 are 0 this selects PCO and bit 0 is 1 this sets PCO to 1 The control word is set up like this Sets PCO to 1 written to BA 11 X don t care Set Reset Set PCO Function Bit Bit Select 000 PCO BA 12 D A Converter 1 LSB Read Write A write programs the DAC1 LSB eight bits BA 13 D A Converter 1 MSB Read Write A write programs the DAC1 MSB four bits into DO through D3 D4 through D7 are irrelevant BA 14 D A Converter 2 LSB Read Write A write programs the DAC2 LSB eight bits 15 D A Converter 2 MSB Read Wr
31. RTD Embedded Technologies Inc Defining the I O 0 A D Data Low Byte Read Only A read provides the low byte bits 0 through 7 of the 20 bit converted data in the conversion counter Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 D7 D6 D5 D3 D2 D1 1 A D Data Middle Byte Read Only A read provides the middle byte bits 8 through 15 of the 20 bit converted data in the conversion counter Bit 15 14 Bit 2 Bitl1 Bit10 Bitg Bit 8 D7 D6 D5 D3 2 D1 2 A D Data High Byte Read Only A read provides the high byte bits 16 through 19 of the 20 bit converted data in the conversion counter plus the counter overflow measurement overflow and conversion ready flag status The counter overflow tells you if the 20 bit conversion counter overflows during a measurement cycle The measurement overflow flag tells you if two or more measurement cycles are executed without clearing the counter between executions The conversion ready flag tells you the conversion status conversion running or conversion finished X Bit 19 Bit 18 Bit17 Bit 16 A D Conversion Status 0 conversion running 1 conversion complete Measurement Overflow Counter Overflow 0 measurements OK 0 no overflow 1 2 more 1 overflow measurements without counter reset 3 Board Ready Clear 20 bit Conversion Counter Read Write A read must give you the value
32. Read Load 001 Mode 1 programmable 1 shot 11 read back setting 00 latching operation 010 Mode 2 rate generator 01 read load LSB only 011 Mode 3 square wave rate generator 10 read load MSB only 100 Mode 4 software triggered strobe 11 read load LSB then MSB 101 Mode 5 hardware triggered strobe BA 20 Board Setup Register Write Only A write sets the PC s interrupt channel the A D conversion mode the system clock speed and the service timer divider Bits 0 through 2 are used to select the interrupt channel Two settings 000 and 001 disable the interrupt If an IRQ channel is programmed the interrupt selected at BA 21 is automatically enabled on that channel The service time is programmable to provide you with as much time as you need to read the data clear the counter and change the channel and gain Conversion Mode 0 single Service Timer Divider 1 continuous 00 5 usec Interrupt Channel Select 01 62 5 usec 000 interrupt disabled 10 126 5 usec System Clock 001 interrupt disabled 11 254 5 usec 00 2 MHz 010 IRQ2 01 1 MHz 011 IRQ3 10 0 5 MHz 100 IRQ4 11 external clock 101 IRQ5 110 IRQ6 111 3 IRQ7 DM300 DM5300 dataModule 4 9 RTD Embedded Technologies Inc Defining the I O 21 A D Trigger Mode Register Write Only This register sets up various triggering parameters for conversions Bit 0 sets the trigger mode internal or external
33. Select Read Write 4 5 BA 10 PPI Port C Digital I O Read Write esee esent 4 6 11 8255 PPI Control Word Write Only ce eeeceeccessecesseceseeceseceneeceneecnseeseeesseceneceaeecsaeceaeecereeenaeesees 4 6 12 D A Converter 1 LSB Read Write sess esee eene entente nennen DY ennt 4 8 13 D A Converter 1 MSB Read Write 4 8 14 D A Converter 2 LSB Read Write entente enne nnn entente inen 4 8 15 D A Converter 2 MSB Read Write 4 8 16 User 8254 Timer Counter 0 Read Write eene eee 4 8 17 User 8254 Timer Counter 1 Read Write sse ener enne 4 8 18 User 8254 Timer Counter 2 Read Write ener ADD ADI enne 4 9 BA 19 User 8254 Control Word Write 2 4 9 BA 20 Board Setup Register Write Only 4 9 BA 21 A D Trigger Mode Register Write 4 10 BA 22 Reset Update DACs Read Write 4 10 AID CODVersiOnS nee dea teh t Re iet t EC
34. ammed into the D A converter by writing two 8 bit words the LSB and the MSB Both outputs can be simultaneously updated by writing to an I O port Digital I O The DM5300 has 16 TTL CMOS compatible digital I O lines which can be directly interfaced with external devices or signals to sense switch closures trigger digital events or activate solid state relays These lines are provided by the 8255 programmable peripheral interface PPI Pads for activating pull up pull down resistors are included on the module Installation procedures are given near the end of Chapter 1 Module Settings What Comes With Your Module You receive the following items in your DM5300 package e DM5300 analog I O dataModule e Mounting hardware Software and diagnostics diskette with example programs in BASIC and e User s manual If any item is missing or damaged please call RTD Embedded Technologies Inc Customer Service Department at 814 234 8087 If you require service outside the U S contact your local distributor Module Accessories In addition to the items included in your DM5300 package RTD Embedded Technologies Inc offers a full line of software and hardware accessories Call your local distributor or our main office for more information about these accessories and for help in choosing the best items to support your module s application Hardware Accessories Hardware accessories for the DM5300 include the TMX32 analog input expansion bo
35. amming don t care Clearing the Module 1 ps Da ps 02 Di bo It is good practice to start your program by resetting the module You can do this by performing a read of the RESET port at BA 22 Setting the Channel To select a conversion channel you must assign the appropriate values to bits 0 through 3 at BA 9 The table below shows you how to determine the bit settings Note that if you don t want to change the gain setting when programming a new channel setting you must preserve the gain portion of the channel gain data when you set the channel BE ae Perks e p e poer YSFA YD LA ne nones dn Setting the Gain To select the gain 1 2 4 or 8 you must assign the appropriate values to bits 4 and 5 at BA 9 The table below shows you how to determine the bit settings Note that if you don t want to change the channel setting when programming a new gain setting you must preserve the channel portion of the channel gain data when you set the gain x x Gi Go x x x x DM300 DM5300 dataModule 4 13 RTD Embedded Technologies Inc A D Conversions Conversion Modes The A D circuitry can perform conversions in two modes Single Convert and Continuous Convert Single Convert Mode The Single Convert mode lets you perform a single A D conversion each time you write a 1 to the Software Trigger Start Convert bit b
36. an be set for 8 differential or 16 single ended by setting the jumpers on Single ended operation is typically used when the analog input voltage source is close to the module and the voltage levels are fairly high greater than 0 5 volts The differential mode provides noise immunity when long cable runs are unavoidable signal levels are low or surrounding electrical noise is high Software programmable binary gains of 1 2 4 and 8 let you amplify low level RTD Embedded Technologies Inc A D Conversion Circuitry V F Converter signals to more closely match the module s input ranges These gains can be customized for even greater input control by adding a gain multiplying resistor circuit as described in Chapter 1 The input range is jumper selectable for 5 volts or 10 volts unipolar or bipolar The available ranges are 0 to 5 0 to 10 2 5 to 2 5 and 5 to 5 volts The module is factory set for 2 5 to 2 5 volts Should you need to change the input range and or polarity you should recalibrate the board according to the instructions in Chapter 6 Calibration Each channel has an input imped ance of greater than 10 megohms Overvoltage protection of 35 Vdc is provided at the multi plexer The V F converter receives an input voltage and converts it to a corresponding frequency which is then read from the frequency counter as 20 bit data The conversion time varies depending on the degree of accuracy you want in your resul
37. ard with thermocouple compensation which can expand a single input channel on your board to 16 differen tial or 32 single ended input channels MR series mechanical relay output boards OP series optoisolated digital input boards the OR16 mechanical relay optoisolated digital I O board the USFA universal sensor front end with sensor excitation the TB50 terminal board and XB50 prototype terminal board for prototype development and easy signal access the DM14 extender board for simplified testing and debugging of prototype circuitry and the XT50 twisted pair ribbon cable assembly for external interfacing Using This Manual This manual is intended to help you install your new module and get it running quickly while also providing enough detail about the module and its functions so that you can enjoy maximum use of DM300 DM5300 dataModule i 4 RTD Embedded Technologies Inc Introduction its features even in the most complex applications We assume that you already have an under standing of data acquisition principles and that you can customize the example software or write your own applications programs When You Need Help This manual and the example programs in the software package included with your module provide enough information to properly use all of the module s features If you have any problems install ing or using this module contact our Technical Support Department 814 234 8087 during regular business hours eastern
38. ate in one of six modes depending on your applica tion The following paragraphs briefly describe each mode DM5300 CONNECTOR m 2 MHz P2 I 8254 PIT I lt ol PIN 41 1 1 91 Q EXTCLK1 PIN 45 I TIMER I E Say s I UNIS Fi 9 EXTGATE1 I 1 1 46 EGT1 ol _ 2 1 egre a i i l I q ai PIN 44 i I OUTO 6 OUTO OUTI 1 1 blc I OUT o 1527 1 TIMER 1 I I l 5V 1 97 1 1 EGT2 ol 1 1 1 l I 1 5 TIMER 1 1 1 Lo IEEE t Od 1 1 EGT2 L__ l 1 1 l OUT 15 grey TRIGGER TRIG 5 OUT OUT2 U EXTERNAL El TRIGGER Fig 4 6 User 8254 Timer Counter Circuitry DM300 DM5300 dataModule 4 21 RTD Embedded Technologies Inc User Available 8254 Timer Counter Mode 0 Event Counter Interrupt on Terminal Count This mode is typically used for event counting While the timer counter counts down the output is low and when the count is complete it goes high The output stays high until a new Mode 0 control word is written to the time
39. based system When removing it from the bag hold the module at the edges and do not touch the components or connectors Before installing the module in your system check the jumper settings Chapter 1 reviews the factory settings and how to change them If you need to change any settings refer to the appropri ate instructions in Chapter 1 Note that incompatible jumper settings can result in unpredictable module operation and erratic response The DM5300 comes with a stackthrough P1 connector The stackthrough connector lets you stack another module on top of your DM5300 To install the module follow the procedures described in the computer manual and the steps below 1 Turn OFF the power to your system 2 Touch a metal rack to discharge any static buildup and then remove the module from its antistatic bag 3 Select the appropriate standoffs for your application to secure the module when you install it in your system two sizes are included with the module 4 Holding the module by its edges orient it so that the P1 bus connector s pin 1 lines up with pin 1 of the expansion connector onto which you are installing the module 5 After carefully positioning the module so that the pins are lined up and resting on the expan sion connector gently and evenly press down on the module until it is secured on the connec tor NOTE Do not force the module onto the connector If the module does not readily press into place remove it an
40. chnologies Inc Chapter 4 Module Operation and Programming User Available 8254 Timer Counter An 8254 programmable interval timer provides three 16 bit 8 MHz timer counters for timing and counting functions such as frequency measurement event counting and interrupts All three timer counters are available for your use Figure 4 6 shows the timer counter circuitry Each timer counter has two inputs CLK in and GATE in and one output timer counter OUT They can be programmed as binary or BCD down counters by writing the appropriate data to the command word as described in the I O map section at the beginning of this chapter One of three clock sources the on board 2 MHz crystal external clock 1 EXT CLK1 P2 41 or external clock 2 EXT CLK2 P2 45 can be selected as the clock input The diagram shows how these clock sources are connected to the timer counters Three gate sources are available 5V on board always tied high external gate I EXT GATEI P2 42 or external gate 2 EXT GATE2 P2 46 The diagram shows how these gate sources are connected to the timer counters The output from timer counter 0 or is jumper selectable The selected output is available at the OUTO OUTI pin 2 44 Timer counter 2 s output is available at the TRIGGER OUT OUT2 P2 43 if it is enabled by placing the jumper on P3 across the appropriate pins The diagram shows how these outputs are connected The timer counters can be programmed to oper
41. ck pulse and then goes high again Digital I O The 16 8255 PPI based digital I O lines can be used to transfer data between the computer and external devices The digital input lines can have pull up or pull down resistors installed as described in Chapter 1 Interrupts The DM5300 has two software selectable interrupt sources end of convert and external trigger The end of convert EOC line can be used to interrupt the computer when a conversion is completed When the 32 bit timer s count reaches 0 the counter gate closes the conversion is complete and the EOC line goes high When in the continuous convert mode the service time begins and you can read the data change the channel gain settings and reset the 20 bit counter The EOC line can be connected through software as shown in the I O Map discussion in Chapter 4 On power up the IRQ line is disabled Change the IRQ channel if necessary for your applica tion If you connect the end of convert to one of the interrupt channels an interrupt will occur when the line transitions from low converting to high not converting The external trigger interrupt source is set by Jumper J4 selecting either the TRIGGER IN P2 39 or the output of TIMER COUNTER 2 see page 1 10 When using the external trigger line as an external interrupt signal the polarity interrupt on rising or falling edge is set at BA 421 bit 1 We recommend that you have an understanding of how to use interrupts in yo
42. crewdriver for trimpot adjustment Figure 6 1 shows the module layout The four trimpots used for calibration TR1 TR2 TR4 and TRS are located in the upper center area of the board V F Calibration Two adjustments are made to calibrate the V F converter One is the offset adjustment and the other is the full scale or gain adjustment Trimpot TR2 is used to make the offset adjustment and trimpot TR1 is used for gain adjustment 51 BASE ADDRESS Q 7 L TR2 MTR R11 R10 n ng 00 LE C48 kd 5100 1184 1785 o mpm ooooooon ogee az 00000000 g000000000 meooooooou 1 R13 HI 508A Of 80 PGA203 m um E Made in Hungary DM300 DM5300 dataModule nins e a vs 00000000000D AD7237 000000000000 82655 miii rM ooooooooou s 82054 ULULI pai Fig 6 1 Module Layout 6 3 RTD Embedded Technologies Inc V F Calibration Connect your voltage source to channel on the DM5300 Use Table 6 1 to set the voltage for your input range and desired adjustment offset or gain Then run the 5300DIAG program adjusting the appropriate trimpot until the input voltage and V F converter output reading matc
43. d try again Wiggling the module or exerting too much pressure can result in damage to the DM5300 or to the mating module 6 After the module is installed connect the cable to I O connector P2 on the module When making this connection note that there is no keying to guide you in orientation You must make sure that pin 1 of the cable is connected to pin 1 of P2 pin 1 is marked on the module with a small square For twisted pair cables pin 1 is the dark brown wire for standard single wire cables pin 1 is the red wire 7 Make sure all connections are secure External I O Connections Figure 2 1 shows the DM5300 s P2 I O connector pinout Refer to this diagram as you make your connections Note that the 12 and 12 volt signals are available at pins 47 and 49 only if your system power supply provides these voltages DM300 DM5300 dataModule 2 3 RTD Embedded Technologies Inc External I O Connections DIFF S E DIFF S E AIN1 AIN1 AIN1 AIN9 AIN2 AIN2 AIN2 AIN10 AIN3 AIN3 AIN3 AIN11 AIN4 AIN4 AIN4 AIN12 AIN4 AIN5 AIN5 AIN13 AIN6 AING AIN6 AIN14 AIN7 AIN7 AIN7 AIN15 AIN8 AIN8 AIN8 AIN16 AOUT 1 ANALOG GND AOUT 2 ANALOG GND ANALOG GND ANALOG GND PA7 PC7 PC6 PAS PCS PA4 PC4 PA3 PC3 PA2 PC2 PA1 PC1 PAO PCO TRIGGER IN DIGITAL GND EXT CLK1 EXT GATE1 TRIGGER OUT OUT2 OUTO OUT1 EXT CLK2 EXT GATE2 12 VOLTS 5 VOLTS 12 VOLTS DIGITAL GND Fig 2 1 P2
44. decimal sees 1 8 Pull up Pull down Resistors on Digital Lines 1 9 J4 Trigger Input Select Factory Setting ener nennen rennen eene 1 10 Gm Gain Multiplier Leer 1 10 CHAPTER 2 MODULE INSTALLATION enata n etna sonne tna n e enano sese tne no enwan 2 1 ModuleInstallatiOn ie n RE HR p eases ter ep qua qe tq ep pe D OI 2 3 External T O Connections rrr e n ORT pP ies a E D re PR n erp di at pectet 2 3 Connecting the Analog Input Pins eese nennen 2 4 Connecting the Trigger In and Trigger Out Pins Cascading Boards essen 2 5 Connecting the Analog Outputs ete t pete REPRE hee RR ete deo seo Rer hoe Ye 2 6 Connecting the Timer Counters and Digital essent nennen neret ene 2 6 Running the 5300DIAG Diagnostics Program nennen nete mener ener 2 6 CHAPTER 3 HARDWARE DESCRIPTION eeeeee eese sesta etn statio sons 0n saeua tasa sene Dn nenn ann 3 1 A D Conversion eR cot D 3 3 Analog InpUts ete tetigit no tite in Eme te Hip aude ieiuniis dovete dd 3 3 MIE CODVeTlGE inse RSS Rp dep oc eet en pate ep d bet a ee re eR 3 4 Timing Counting ee neu ti te ttp rt P Rhe reiche er rete ire ee et 3 5 D A Converter
45. ding of how to use interrupts in your system before you connect to an IRQ channel DM300 DM5300 dataModule 3 7 RTD Embedded Technologies Inc DM300 DM5300 dataModule 3 8 RTD Embedded Technologies Inc 4 MODULE OPERATION AND PROGRAMMING DM300 DM5300 dataModule This chapter tells you how to initialize the module and read the converted data It describes operating modes and provides flow diagrams and a complete description of the I O map to aid you in programming your DM5300 The example programs included on the disk in your board package are listed at the end of this chapter These programs written in BASIC and Turbo C include source code to simplify your applications programming Chapter 5 Calculating Frequencies Voltages and Bits contains tables formulas and examples to help you understand the prin ciples of V F conversion 4 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule 4 2 RTD Embedded Technologies Inc Chapter 4 Module Operation and Programming Defining the Map The I O map for the DM5300 is shown in Table 4 1 below As shown the module occupies 23 consecutive I O port locations The base address designated as BA can be selected using DIP switch S1 as described in Chapter 1 Module Settings This switch be accessed without removing the module from the computer S1 is factory set at 300 hex 768 decimal The following sections describe the register contents of eac
46. el input voltage 2 2V min 5 5V max Low level input voltage 0 3V min 0 8V max Input load Currerit eet eet een e 10 pA Input capacitance std eet ed aid 10 pF Output capacitance COUT S FHI MHZ trt eer 20 pF D A Wenn AD7237 Analog OUTDUIS paite eee 2 channels Resol tiom NUMERI edad he 12 bits Output ranges idee 0 to 5 5 0 to 10 or 10 volts Guaranteed linearity across output ranges DM300 n 0 to 5 5 0 to 49 2 and 9 2 volts Guaranteed linearity across output ranges DM5300 Qt 0 to 5 5 0 to 10 and 10 volts RelatiVe Ccuracy 1 LSB Full scale accuracy itte cd aes 5 LSB max INon lirearity egu eu a ue utes 1 LSB max Settling e ee dd 10 usec max Quiput GUITent dae ania ent 5 ma typ Tinier COUnIers 2 5 ccc rec RYN wu a nna CMOS 82 54 Three 16 bit down counters 2 cascaded 1 independent 6 programmable operating modes Counter input source External clock 8 MHz max or on board 2 MHz clock Gounter outpuls iet Ret RES Available externally Counter gate source
47. eled EGT2 on the header is EXT GATE2 at P2 46 Figure 1 4 shows a block diagram of the P5 5V EGT1 EGT2 5V EGT1 EGT2 5V EGT1 EGT2 13179 03175 31 9 Fig 1 5 User Timer Counter Gate Source Jumpers 5 DM300 DM5300 dataModule 1 5 RTD Embedded Technologies Inc Factory Configured Switch and Jumper Settings timer counter circuitry to help you with these connections NOTE When installing jumpers on this header make sure that only one jumper is installed in each group of GATE pins P6 Single Ended Differential Analog Inputs Factory Setting S 16 Single Ended P6 O 0o UO o uU o Fig 1 6 Single Ended Differential Analog Input Signal Type Jumpers P6 This header connector shown in Figure 1 6 is used to configure the DM5300 for 8 differential or 16 single ended analog input channels When operating in the 16 input single ended mode three jumpers must be installed across the S pins When operating in the 8 input differential mode three jumpers must be installed across the D pins DO NOT install jumpers across both S and D pins at the same time P7 Analog Input Voltage Range and Polarity Factory Setting 5 BI 2 5 Volts P7 shown in Figure 1 7 sets the analog input voltage range and polarity The module can be set up P7 5V 10V UNI Bl Fig 1 7 Analog Input Voltage Range and Polarity P7 to operate over a range of 5 or 10 volts unipolar or bipolar The module s four poss
48. essed at BA 7 decimal TA stands for timer 0 which is addressed at BA 4 and TB stands for timer which is addressed at 5 All values are in hex OU WC amp H34 SET UP TIMER 0 AS MODE 2 OU WC amp H74 SET UP TIMER 1 AS MODE 2 OU A amp H20 SE IMER 0 DIVIDER LSB LSB 32 FOR DIVIDER OF 32 OU A amp HO SE IMER 0 DIVIDER MSB MSB 0 FOR DIVIDER OF 0 OU B amp HFE SE IMER 1 DIVIDER LSB LSB 255 FOR DIVIDER OF 255 OU amp SE IMER 1 DIVIDER MSB MSB 15 FOR DIVIDER OF 15 Initializing the 8255 PPI The eight Port B lines of the 8255 PPI control the channel and gain selection Port B is pro grammed at I O address location BA 9 To use Port B for these functions the 8255 must be initialized so that Port B is setup as a Mode 0 output port This is done by writing this data to the PPI control word at I O address BA 11 DM300 DM5300 dataModule Channel Gain 00 x1 01 x2 10 x4 11 x8 4 12 Analog Input 4 Channel Select 0000 channel 1 0001 channel 2 0010 channel 3 0011 channel 4 0100 channel 5 0101 channel 6 0110 channel 7 0111 channel 8 1000 channel 9 1001 channel 10 1010 channel 11 1011 channel 12 1100 channel 13 1101 channel 14 1110 channel 15 1111 channel 16 RTD Embedded Technologies Inc Chapter 4 Module Operation and Progr
49. etre LEL LYN trennen trennen teste entrent i 4 Digital O p i 4 What Comes With Your Board 0 eee ceeesccesceseeesceseeeeceseseeecseecsecaeesaecsecsaeceecseeesesesseseseseaecsaeeaecaeecaecaeeaeenaeenees i 4 Board ACCESSOTES ees e eet e dm ener Rm i 4 Hardware ACCES Somes uni be tete tette i 4 Using This Manali EE HR eet e rie te p Se n Me bdo cut i 4 When You Need Help Red cl Gitte Dn deed 5 CHAPTER 1 MODULE SETTINGS 1 1 Factory Configured Switch and Jumper Settings sse ener eren nennen 1 3 User Timer Counter Output Select Factory Setting P2 43 TRIG P2 44 1 4 P4 User Timer Counter Clock Source Factory Settings CLK0 OSC CLK1 OTO CLK2 OT 1 1 4 P5 User Timer Counter Gate Source Factory Settings All Gates 5 1 5 Single Ended Differential Analog Inputs Factory Setting S 16 Single Ended 1 6 P7 Analog Input Voltage Range and Polarity Factory Setting 5V BI 2 5 Volts 1 6 P8 DAC Output Voltage Range Factory Setting 5 to 5 volts 1 6 P9 DAC 2 Output Voltage Range Factory Setting 5 to 5 volts sssseeeee 1 7 S1 Base Address Factory Setting 300 hex 768
50. h Table 6 1 A D Offset and Gain Adjustments Input Voltage TR2 Offset 0001 V 0001 475 V cov 9 75 V 2 5 to 42 5 volt input range OV RENE 0v 225 V D A Calibration The D A converter requires no calibration for the X1 ranges 0 to 5 and 5 volts The following paragraph describes the calibration procedure for the X2 multiplier ranges To calibrate for X2 0 to 10 or 10 volts set the DAC output voltage range to 0 to 10 volts jumpers on X2 and U on AOUTI or P7 AOUT2 Then program the corresponding D A converter DACI or DAC2 with the digital value 2048 The ideal DAC output for 2048 at X2 0 to 10 volt range is 5 0000 volts Adjust for AOUTI and TR5 for AOUT2 until 5 0000 volts is read at the output Table 6 2 lists the ideal output voltages per bit weight for unipolar ranges and Table 6 3 lists the ideal output voltages for bipolar ranges DM300 DM5300 dataModule 6 4 RTD Embedded Technologies Inc Chapter 6 Calibration Table 6 2 D A Converter Unipolar Calibration Table Table 6 3 D A Converter Bipolar Calibration Table Ideal Output Voltage in millivolts pw 8 o DM300 DM5300 dataModule 6 5 RTD Embedded Technologies Inc DM300 DM5300 dataModule 6 6 RTD Embedded Technologies Inc Appennix DM 5300 SPECIFICATIONS DM300 DM5300 dataModule 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule A 2 RTD Embedded Tec
51. h address used in the I O map Table 4 1 DM5300 I O Map Address Register Description Read Function Write Function Decimal Hex Read bottom 8 bits of A D Data Low Byte 20 bit converted data word Reserved BA 0 00 Read middle 8 bits of A D Data Middle Byte 20 bit converted data word Reserved BA 17 01 Read top 4 bits of 20 A D Data High Byte Status bit converted data word amp status Reserved BA 2 02 Read 8 bit Port A digital Program 8 bit Port A 8255 PPI Port A Digital I O input lines digital output lines BA 8 08 8255 PPI Port B A D Read channel gain Channel Gain Select settings Program channel amp gain BA 9 09 Read 8 bit Port C Program 8 bit Port C 8255 PPI Port C Digital I O digital input lines digital output lines 10 8255 8255 PPI Control Register Reserved configuration 11 08 Program bottom 8 bits of DAC 1 Low Byte Reserved 12 bit DAC 1 data BA 12 0C Program top 4 bits of 12 DAC 1 High Byte Reserved bit DAC 1 data 13 00 Program bottom 8 bits of DAC 2 Low Byte Reserved 12 bit DAC 2 data 14 Program system clock conversion mode and Board Setup Reserved interrupt channel BA 20 14 A D Trigger Mode Program trigger mode Reserved and parameters BA 21 15 Simultaneously update Reset Update DACs Resets board DAC 1 and DAC 2 BA 22 16 BA Base Address DM300 DM5300 dataModule 4 3
52. hnologies Inc Appendix A DM5300 Specifications DM5300 Characteristics Typical 25 C Interface Switch selectable base address I O mapped Software selectable interrupt Analog Input 8 differential 16 single ended Input impedance each channel gt 10 megohms Input ranges 0 to 5 O to 10 2 5 or 5 volts Overvoltage protection 35 Vdc Gains software selectable 1 2 4 amp 8 plus Gm gain multiplier Gaim erro 0 05 typ 0 25 Common mode input voltage 10 volts max Settling tim Qaini 1 10 usec max eer ee 52 Types c ELA eto e eode D EN a Synchronous FiesolutlOri ue to 18 bits 19 uV 5 volt range LiriGarityertOr uoce ec ctl t fer rc eee ead 0 005 max Conversion Speed See table below Digital l O heehee ieee en eee CMOS 82C55 Number OF IN S eiu os e Spes 16 Logic compatibility 5 oce ec Eten ee aie TTL CMOS Configurable with optional pull up pull down resistors High level output Voltage sisis ignia intaia ennemi 4 2V min Low level output voltage 0 45V max High lev
53. ible ranges are 0 to 5 0 to 10 2 5 and 5 volts Figure 1 7 shows the factory setting of 2 5 to 2 5 volts NOTE If you change the analog input range and or polarity you should recalibrate the board according to the instructions in Chapter 6 Calibration Otherwise you may get erroneous data P8 DAC 1 Output Voltage Range Factory Setting 5 to 5 volts DM300 DM5300 dataModule 1 6 RTD Embedded Technologies Inc Chapter 1 Module Settings 8 DAC1 Fig 1 8 DAC 1 Output Voltage Range Jumper P8 This header connector shown in Figure 1 8 sets the output voltage range for DAC at 0 to 5 5 0 to 10 or 10 volts Two jumpers must be installed one to select the range and one to select the multiplier The first two positions select the range bipolar 5 or unipolar 5 The next two positions select the multiplier X2 or X1 When a jumper is on the X2 multiplier pins the range values become 10 and 10 The table on the next page shows the four possible combinations of jumper settings This header does not have to be set the same as P9 0 to 10 volts gt ITE Fig 1 9 DAC 2 Output Voltage Range Jumper P9 DAC2 DM300 DM5300 dataModule 1 7 RTD Embedded Technologies Inc Factory Configured Switch and Jumper Settings P9 DAC 2 Output Voltage Range Factory Setting 5 to 5 volts This header connector shown in Figure 1 9 sets the output voltage range for DAC 2 at 0 to
54. iplied by a correction factor of 1 which is the same as 1 1 second If you count the same 10 Hz signal for 0 5 seconds your count would be 5 This is multiplied by a correction factor of 2 1 0 5 seconds which again gives you the true frequency of 10 Hz Counting 10 Hz for 2 seconds gives you a count of 20 which is then multiplied by a correction factor of 0 5 1 2 seconds for a result of 10 Hz In contrast a more complex example is counting for 131 072 milliseconds our 16 bit resolution example given above The correction factor is 1 0 131072 or 7 629 The upper four bits of the high byte ADHB contain the measurement overflow counter overflow and conversion done flags These flags must be masked out when you calculate the frequency or voltage value DM300 DM5300 dataModule 5 7 RTD Embedded Technologies Inc Input Voltages and Output Frequencies Input Voltages and Output Frequencies The analog inputs can be set up for four ranges 0 to 5 0 to 10 2 5 to 2 5 and 5 to 5 volts The following tables show the expected output frequencies for selected input voltages in each range for a 1 MHz system clock For 0 to 5 V range Frequency 100 000 x Input Voltage Frequency 50 000 x Input Voltage For 2 5 to 2 5 V range Frequency 100 000 x Input Voltage 2 5 For 5 to 5 V range Frequency 50 000 x Input Voltage 5 DM300 DM5300 dataModule 5 8 RTD Embedded Technologies Inc Chapter
55. it 4 at BA 21 BA 20 bit 3 should be set to 0 for single conversions Figure 4 1 shows the timing diagram for this mode and Figure 4 2 provides a flow diagram Start Conversion Counters Counters Enabled Enabled End of Convert 132 072 ms Counting Read Count Counting Read Count A D Counters Gate Fig 4 1 Single Convert Mode Timing Diagram DM300 DM5300 dataModule 4 14 RTD Embedded Technologies Inc Chapter 4 Module Operation and Programming Set system clock single conversion mode internal trigger Program 8254 Timer for desired gate time Clear Conversion Yes Select Channel amp Gain Change Channel Start Conversion Check End of Convert EOC 1 Yes Read contents of counters Yes Clear counters Stop Program Fig 4 2 Single Convert Mode Flow Diagram DM300 DM5300 dataModule 4 15 RTD Embedded Technologies Inc A D Conversions Continuous Convert Mode The Continuous Convert mode lets you perform continuous conversions by writing a 1 to the Software Trigger Start Convert bit bit 4 at BA 21 20 bit 3 should be set to 1 for continuous conversions Figure 4 3 shows the timing diagram for this mode and Figure 4 4 provides a flow diagram Start Conversion Counters End of Convert Enabled Counters Disabled 131 072ms gt Service Time gt Counting A D Counters Gate Read Co
56. ite A write programs the DAC2 MSB four bits into DO through D3 D4 through D7 are irrelevant Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit11 Bit10 Bitg9 Bit 8 BA 16 User 8254 Timer Counter 0 Read Write Two reads show the count in the timer counter and two writes load the counter timer with a new 16 bit value LSB followed by MSB The timer counter must be loaded in two 8 bit steps Count ing begins as soon as the MSB is loaded BA 17 User 8254 Timer Counter 1 Read Write Two reads show the count in the timer counter and two writes load the counter timer with a new 16 bit value LSB followed by MSB The timer counter must be loaded in two 8 bit steps Count ing begins as soon as the MSB is loaded DM300 DM5300 dataModule 4 8 RTD Embedded Technologies Inc Chapter 4 Module Operation and Programming BA 18 User 8254 Timer Counter 2 Read Write Two reads show the count in the timer counter and two writes load the counter timer with a new 16 bit value LSB followed by MSB The timer counter must be loaded in two 8 bit steps Count ing begins as soon as the MSB is loaded BA 19 User 8254 Control Word Write Only Accesses the 8254 PIT control register to directly control the three user timer counters D7 D6 D5 D3 D2 D1 BCD Binary 0 binary 1 BCD Counter Select 00 Counter 0 Counter Mode Select 01 Counter 1 000 Mode 0 event count 10 2
57. jumper the inputs for differential or single ended operation Two unipolar and two bipolar ranges can be selected 0 to 5 0 to 10 22 5 or 5 volts The module is calibrated at the factory for 2 5 volts Software programmable gains of 1 2 4 and 8 with an on board gain multiplier circuitry let you customize the input range Over voltage protec tion to 35 volts is provided at the inputs A D conversions are performed by a voltage to frequency V F converter This exceptionally accurate converter technology lets you vary the resolution of your conversion while maintaining the full input voltage range For example with a 1 MHz system clock and the input range set for 5 volts 10 bit conversions are performed at a rate of 488 samples per seconds with a resolution of 4 88 millivolts 12 bit conversions are performed at a rate of 122 samples per second with a resolution of 1 22 millivolts and 18 bit conversions are performed at a rate of 2 samples per second with a resolution of 19 microvolts The converted data is read and or transferred to PC memory one byte at a time through the PC data bus DM300 DM5300 dataModule i 3 RTD Embedded Technologies Inc Digital to Analog Conversion Digital to Analog Conversion The digital to analog D A circuitry features two independent 12 bit analog output channels with individually jumper selectable output ranges of 5 to 5 volts 10 to 10 volts 0 to 5 volts or 0 to 10 volts Data is progr
58. l I O lines Three timer counters from the user 8254 is available at the I O connector for your use Figure 3 1 shows the block diagram of the board This chapter describes hardware which makes up the major circuits It also discusses interrupts ADDRESS ADDRESS DECODE CONTROL PC BUS DATA 20 BIT 16 ANALOG INPUTS MEASUREMENT 0 10V 5V 0 5V 2 5V COUNTER 8 DIFF 16 S E YDLIAGE PROGRAMMABLE 16 CLK FREQUENCY GAIN AMPLIFIER 7 CONVERTER 2 MHz osc MEASUREMENT TIME BASE SYSTEM CLOCK SERVICE TIMER ND EXT CLK1 GATE CONTROL LOGIC INTERRUPT SELECT EXTERNAL TRIGGER IN TRIGGER 9 45V LOGIC o CLK PULL UP DOWN uu SAMPLE RESISTORS 2 COUNTER Gare 5 8255 o PPI E TIMER COUNTER 5 PACER CLOCK SELECT RANGE SELECT 5 VOLTS CONVERTER 0 5 VOLTS AOUT2 10 VOLTS 12 VOLTS CONTROL 5 VOLTS V Fig 3 1 DM5300 Block Diagram A D Conversion Circuitry Analog Inputs DM300 DM5300 dataModule The DM5300 performs analog to digital conversions using a voltage to frequency converter and timing and counting circuits This circuitry functions as an exceptionally accurate integrating converter The V F converter converts the input voltage to a frequency between 0 and system clock 2 full scale and this frequency is counted by the frequency counter for a specified period of time The following paragraphs describe the A D circuitry The input type c
59. liar with technical details of the problem or situation along with their phone and fax numbers address and e mail address if available List your shipping address Indicate the shipping method you would like used to return the product to you We will not ship by next day service without your pre approval Carefully package the product using proper anti static packaging Write the RMA number in large 1 letters on the outside of the package Return the package to RTD Embedded Technologies Inc 103 Innovation Blvd State College PA 16803 0906 USA D 2 LIMITED WARRANTY RTD Embedded Technologies Inc warrants the hardware and software products it manufactures and produces to be free from defects in materials and workmanship for one year following the date of shipment from RTD Embedded Technologies INC This warranty is limited to the original purchaser of product and is not transferable During the one year warranty period RTD Embedded Technologies will repair or replace at its option any defective products or parts at no additional charge provided that the product is returned shipping prepaid to RTD Embedded Technologies All replaced parts and products become the property of RTD Embedded Technologies Before returning any product for repair customers are required to contact the factory for an RMA number THIS LIMITED WARRANTY DOES NOT EXTEND TO ANY PRODUCTS WHICH HAVE BEEN DAMAGED AS A RESULT OF ACCIDENT MISUSE A
60. ltage to frequency converter to 5 0 to 10 2 5 or 5 volt input range Programmable gains of 1 2 4 and 8 with an on board gain multiplier circuit Clock controlled A D conversion Software selectable system clock interrupt source and interrupt channel Trigger in and trigger out for external triggering or cascading boards Two 12 bit analog output channels 5 10 0 to 5 or 0 to 10 volt analog output range Three user available 16 bit timer counters 16 8255 based TTL CMOS compatible digital I O lines 5 volt operation DM5300 The following paragraphs briefly describe the major functions of the module More detailed discussions of module functions are included in Chapter 3 Hardware Description and Chapter 4 Module Operation and Programming The module setup is described in Chapter 1 Module Settings The difference between the DM300 and the DM5300 modules is in the power supply requirements The DM300 module needs a 5 12 and 12 volt supply for proper operation The DM5300 module needs only a 5 volt power supply making it ideal for portable applications Analog to Digital Conversion The analog to digital A D conversion circuitry receives up to eight differential or 16 single ended analog inputs and converts these inputs into frequencies The frequencies are represented by 20 bit plus overflow words in 3 x 8 bit format which are read and or transferred to PC memory An on board header connector lets you
61. nd when the conversion is ready the programmable service counter starts its countdown during which the converted data is read and the input channel and gain for the next conversion are set When the service counter reaches 0 the next conversion is triggered D A Converter Two independent 12 bit analog output channels are included on the DM5300 The analog outputs are generated by two 12 bit D A converters with independent jumper selectable output ranges of 5 10 0 to 5 and 0 to 10 volts The 10 volt range has a resolution of 4 88 millivolts the 5 and 0 to 10 volt ranges have a resolution of 2 44 millivolts and the 0 to 5 volt range has a resolution of 1 22 millivolts The D A outputs can be updated simultaneously or asynchronously Timer Counters Three 16 bit 8 MHz timer counters on the user 8254 TCO TC1 and TC2 support a wide range of timing and counting functions Each timer counter has two inputs CLK and GATE and one output OUT Figure 3 3 shows the timer counter circuitry and the connections you can make to the inputs and outputs Each timer counter can be programmed as binary or BCD down counters by writing the appropriate data to the command word as described in Chapter 4 The command word also lets you set up the mode of operation The six programmable modes are Mode 0 Event Counter Interrupt on Terminal Count Model _ Hardware Retriggerable One Shot Mode2 Rate Generator Mode3 Square Wave Mode Mode4 _ Software
62. ng the Settings for the 8254 Timer 3 Next we must divide the system clock which drives the 8254 by the change we must detect to determine the value we must program into the timer 1 000 000 7 62394 1 000 000 500 000 65 536 2 x 65 536 131 072 We need to divide the system clock by 131 072 to open the timer for the right amount of time 131 072 milliseconds to take 16 bit readings Counter 0 is programmed with the 16 least significant bits of the 32 bit timer word All of our example programs use binary division and set counter 0 to 32 When counter 0 is 32 the 1 MHz clock is divided by 32 for a resulting 31 250 Hz clock into timer 1 as shown below System 31 250 2 Clock To set for 32 LSB 32 20 MSB 0 00 Then timer 1 which contains the 16 most significant bits of the 32 bit timer word is programmed The value to be programmed is determined by 131 072 32 1 4095 The value we must program in timer is 4095 as shown in the diagram below System 7 629 Hz Clock To set for 32 To set for 4095 LSB 32 20 LSB 255 FF MSB 0 00 MSB 15 OF The values calculated using the formulas already presented will open the window of the counters for the right amount of time whenever you are doing conversions Note that you always subtract 1 from the timer value in order to correct for the 8254 s method of loading and counting The table below shows the count which must be loaded into the
63. of the 8255 automatically power up as inputs which can float high during the few moments before the board is first initialized This can cause the external devices connected to these lines to operate erratically By pulling these lines down when the data acquisition system is first turned on the motors will not switch on before the 8255 is 1 ca ER EE PAO 7 PULL DOWN LES PC4 7 Fig 1 11 Adding Pull ups and Pull downs to Digital I O Lines DM300 DM5300 dataModule 1 9 RTD Embedded Technologies Inc initialized To use the pull up pull down feature you must connect them into the circuit as pull ups or pull downs Locate the three hole pads J1 J2 J3 on the board below the P2 connector They are labeled G for ground on one end and V for 5V on the other end The middle hole is common is for Port A J2 is for Port C Lower J3 is for Port C Upper To operate as pull ups solder jumper wire between the common pin middle pin of the three and the V pin For pull downs solder a jumper wire between the common pin middle pin and the G pin Figure 1 11 shows Port A lines with pull ups Port C Lower with pull downs and Port C Upper with no resistors J4 Trigger Input Select Factory Setting TR This header connector shown in Figure 1 12 is used to select the input for the triggering circuit Fig 1 12 J4 Trigger Input Select The two options are TR TRIGGER IN P2 39 or O
64. ow to calculate the true frequency of a conversion using the correction factor expected frequency outputs for selected input voltages for each of the four analog input ranges and how to convert frequency to voltage and bit values Calculating the Settings for the 8254 Timer When performing voltage to frequency conversions the resolution of your result is dependent on how long you look at the output of the converter On the DM5300 a software selectable system clock drives the V F converter The converter divides this clock by 2 internally Therefore the output from the V F converter will always be between 0 and the system clock 2 full scale Using the 20 bit conversion counter you look at the output of the V F converter for a specified period of time and count the number of transitions which occur in the output during that time frame You can set your time period for binary or decimal depending on whether you want to measure your resolution as a function of bits or voltage How long do you want to look at the current conversion before starting a new one The window of time is set by two 16 bit timers on the 8254 PIT These timers are cascaded to form a 32 bit timer which is programmed to open up the conversion counter so that you can obtain data at the accuracy level you need for your application Below is a table showing resolution vs conversion time at a 1 MHz system clock DM5300 A D Conversion Resolution 1 MHz System Clock RESOLUT
65. r counter Mode 1 Hardware Retriggerable One Shot The output is initially high and goes low on the clock pulse following a trigger to begin the one shot pulse The output remains low until the count reaches O and then goes high and remains high until the clock pulse after the next trigger Mode 2 Rate Generator This mode functions like a divide by N counter and is typically used to generate a real time clock interrupt The output is initially high and when the count decrements to 1 the output goes low for one clock pulse The output then goes high again the timer counter reloads the initial count and the process is repeated This sequence continues indefinitely Mode 3 Square Wave Mode Similar to Mode 2 except for the duty cycle output this mode is typically used for baud rate generation The output is initially high and when the count decrements to one half its initial count the output goes low for the remainder of the count The timer counter reloads and the output goes high again This process repeats indefinitely Mode 4 Software Triggered Strobe The output is initially high When the initial count expires the output goes low for one clock pulse and then goes high again Counting is triggered by writing the initial count Mode 5 Hardware Triggered Strobe Retriggerable The output is initially high Counting is triggered by the rising edge of the gate input When the initial count has expired the output goes low for one clo
66. rnal clock inputs the first source labeled EC1 on the header is EXT at P2 41 and the second source labeled EC2 on the header is EXT CLK2 at P2 45 or you can set TC1 and TC2 to be clocked by the 2 MHz oscillator Figure 1 4 shows a block diagram of the timer counter circuitry to help you with these connections NOTE When installing jumpers on this header make sure that only one jumper is installed in P4 OSC EC1 EC2 OUTO OSC EC1 EC2 OUT1 OSC EC1 EC2 019 ATO CATO Fig 1 3 User Timer Counter Clock Source Jumpers P4 DM300 DM5300 dataModule 1 4 RTD Embedded Technologies Inc Chapter 1 Module Settings DM5300 CONNECTOR 2 MHz P2 lt XTAD EXTCLK1 EXTCLK2 45V TIMER Sins PIN 46 EXTGATE1 EXTGATE2 TIMER TIMER TRIGGER O gt OUT OUT2 EXTERNAL 1 TRIGGER OUT Fig 1 4 8254 Timer Counter Circuit Block Diagram each group of CLK pins P5 User Timer Counter Gate Source Factory Settings All Gates 5V This header connector shown in Figure 1 5 lets you select the gate sources for the user available 8254 timer counters TCO TC1 and TC2 The factory setting ties all three gates high to an on board 5 volt source You can connect any or all of the gates to either of two external gate inputs the first source labeled on the header is EXT GATE at P2 42 and the second source lab
67. s Stop Program Fig 4 5 Cascaded Modules Single Convert Mode Flow Diagram DM300 DM5300 dataModule 4 18 RTD Embedded Technologies Inc Chapter 4 Module Operation and Programming Reading the Converted Data After a conversion is completed the data is read from the 20 bit conversion counter The excerpt below from an example BASIC program shows you how data is read from the counter The data is read in three bytes the low middle and high byte at three I O address locations BA 0 BA 1 and BA 2 The upper half of the byte contains the status bit of the measurement You must mask this bit out before using the value ADLB INP READ COUNTER LOW BYTE ADMB INP BA 1 READ COUNTER MIDDLE BYTE ADHB INP BA 2 AND OHE READ COUNTER HIGH BYTE RESULT ADLB ADMB x 256 ADHB x 65536 x CF The last line of this example program shows you how to convert the result into the true frequency output by the V F converter After performing the multiplication by the bit weight for each of the four bytes read you must then multiply the result by a correction factor CF in order to find the true frequency of the signal you measured The correction factor is the inverse of the amount of time you had the counter gated open for counting CF 1 Gate Time For example if you count a 10 Hz signal for second your count would be 10 This is multiplied by a correction factor of 1 which
68. sion Results and Correction Factor section 3 Next we must divide the system clock which drives the 8254 by the change we must detect to determine the value we must program into the timer 1 000 000 10 100 000 We need to divide the 1 MHz clock by 100 000 to open the timer for the right amount of time 100 milliseconds to take 100 microvolt resolution readings Counter 0 is programmed with the 16 least significant bits of the 32 bit timer word When counter 0 15 2000 the 1 MHz clock is divided by 2000 for a resulting 0 5 kHz clock into timer Then timer 1 which contains the 16 most significant bits of the 32 bit timer word is programmed The value to be programmed is determined by 100 000 2000 1 49 The value we must program in timer 1 is 49 as shown in the diagram below System Clock To set for 2000 To set for 49 LSB 208 00 LSB 49 31 MSB 7 07 MSB 0 00 Like in binary calculations the values calculated using the formulas already presented will open the window of the counters for the right amount of time whenever you are doing conversions Note that you always subtract from the timer value in order to correct for the 8254 s method of loading and counting The two tables on the following page show the count which must be loaded into the timers for input ranges of 5 volts or 10 volts for the listed voltage based resolutions DM300 DM5300 dataModule 5 5 RTD Embedded Technologies Inc
69. t and the speed of the system clock The software selectable system clock can be set for 0 5 1 or 2 MHz A 1 MHz clock provides the best speed versus linearity tradeoff for most applications At 0 5 MHz linearity improves but the conversion time doubles A 2 MHz clock performs the fastest conversions but sacrifices linearity With a system clock of 1 MHz a 12 bit conversion is performed in about 8 milliseconds a 16 bit conver sion in 131 milliseconds and an 18 bit conversion in 524 milliseconds The V F converter used on the DM5300 is Analog Devices AD652 monolithic synchronous V F converter This extremely linear device is clocked by the programmable system clock The system clock signal is divided by 2 on the chip resulting in the 0 to system clock 2 frequency range of the converter The same system clock is used to gate the timer circuitry which means that you will get accurate conversions even if the clock frequency should drift To compensate for gain drift in the V F converter a trimpot is provided on the board Chapter 6 Calibration tells you how to adjust this trimpot ANALOG IN V F CLK CONVERTER 20 GATE COUNTER SYSTEM CLOCK CONTROL LOGIC e p 2 o 2 Fig 3 2 V F Timing and Counting Block Diagram DM300 DM5300 dataModule 3 4 RTD Embedded Technologies Inc Chapter 3 Hardware Description Timing and Co
70. th its clock input connected to the output of timer counter 1 can be used as a sample counter to provide a hardware count of the number of samples being taken 7 8254 Control Word Write Only Accesses the 8254 PIT control register to directly control the three timer counters D7 D6 D5 D3 D2 D1 BCD Binary 0 binary 1 BCD Counter Select 00 Counter 0 Counter Mode Select 01 Counter 1 000 Mode 0 event count 10 2 Read Load 001 Mode 1 programmable 1 shot 11 read back setting 00 latching operation 010 Mode 2 rate generator 01 read load LSB only 011 Mode 3 square wave rate generator 10 read load MSB only 100 Mode 4 software triggered strobe 11 read load LSB then MSB 101 Mode 5 hardware triggered strobe BA 8 PPI Port A Digital I O Read Write Transfers the 8 bit Port A digital input and digital output data between the board and an external device A read transfers data from the external device through P2 and into PPI Port A a write transfers the written data from Port A through P2 to an external device BA 9 PPI Port Channel Gain Select Read Write A write programs the analog input channel and gain for the next conversion This port must be set up as a Mode 0 output for proper operation Reading this register shows you the current bit settings DM300 DM5300 dataModule 4 5 RTD Embedded Technologies Inc Defining
71. timers for the listed bit based resolutions for Single Convert and for Continuous Convert modes e nn un un Resolution Decimal Hex Decimal Hex Decimal Hex Decimal Hex DM300 DM5300 dataModule 5 4 RTD Embedded Technologies Inc Chapter 5 Calculating Frequencies Voltages and Bits Decimal Calculations To determine the decimal value to be loaded into the timer for voltage based resolutions you must first calculate what change in the output frequency of the V F converter you must detect in order to achieve your desired resolution Unlike with the bit based formulas you must include the input voltage range in this calculation Then you must divide the system clock which drives the 8254 the same clock which drives the V F converter down to the value of this change in frequency The result is the value you load into the timer For example let s set up the timer for conversions with a resolution of 100 microvolts 1 Calculate the amount of change you must discern for 100 microvolt resolution and an input range of 5 volts 5 V 100 uV 50 000 which means you must detect a 1 part change in 50 000 to have a resolution of 100 microvolts 2 Next convert this result into frequency 0 5 MHz full scale for a 1 MHz system clock 500 000 Hz 50 000 10 Hz This means that we must detect a change of 10 Hz out of 0 5 MHz Also note that this fre quency 10 Hz is the correction factor see discussion in Conver
72. unt Counters Counters Enabled Disabled Counting Read Count Interrupt if enabled Fig 4 3 Continuous Convert Mode Timing Diagram DM300 DM5300 dataModule 4 16 RTD Embedded Technologies Inc Set system clock service time continuous convert mode internal trigger Program 8254 Timer for desired gate time Clear Conversion Select Channel amp Gain Start Conversion Check End of Convert EOC 1 Read contents of counters Clear counters Chapter 4 Module Operation and Programming Clear Conversion Stop Program Fig 4 4 Continuous Convert Mode Flow Diagram DM300 DM5300 dataModule 4 17 RTD Embedded Technologies Inc A D Conversions Cascading Modules Two or more modules can be cascaded and triggered so that conversions are performed simulta neously on each module Figure 4 5 provides a flow diagram for cascaded operation Chapter 2 shows how to connect the modules for simultaneous triggering Boards 1 amp 2 Set system clock single conversion mode Board 1 internal trigger Board 2 external trigger rising edge Boards 1 amp 2 Program 8254 Timer for desired gate time Boards 1 amp 2 Clear Conversion Boards 1 amp 2 Select Channel amp Gain Board 1 Start Conversion Board 1 Check End of Convert EOC 1 Boards 1 amp 2 Read contents of counters Boards 1 amp 2 Clear counter
73. unting Circuits The timing and counting circuits used with the V F converter are shown in Figure 3 2 Very simply the 8254 opens a window of time and the 20 bit counter counts the frequency output of the V F converter The 20 bit counter has two flags counter overflow and measurement overflow The counter overflow flag is set if the 20 bit counter overflows within a single measurement cycle The mea surement overflow flag is set if two or more measurement cycles have been executed without the counter being cleared between cycles As shown in Figure 3 2 the 8254 programmable interval timer PIT contains three 16 bit timers Two of these timers are cascaded to form a 32 bit timer which gates the frequency counters The frequency counters are opened for a window of time specified by this 32 bit timer You program the timer for the amount of time that you want the frequency counters to count according to your desired resolution The remaining timer in the 8254 timer 2 can be used as a sample counter The 8254 data sheet is included in Appendix C to assist you in using this timer A 20 bit counter is used to count the frequency output of the V F converter for the period specified by the 8254 timer For single conversions a conversion is started the 20 bit counter is gated for a specified period of time and the value is read For continuous conversions the first conversion is started the 20 bit counter is gated for a specified period of time a
74. upts BASIC Programs These programs are source code files so that you can you can easily develop your own custom software for your DM5300 Analog to Digital READ Demonstrates basic operation of A D EXTTRIG Similar to READ except that an external trigger is used Digital I O DIGITAL Simple program the shows how to read and write the digital I O lines Digital to Analog DAC Shows how to use the DAC Uses A D channel to monitor the output of DAC DM300 DM5300 dataModule 4 23 RTD Embedded Technologies Inc DM300 DM5300 dataModule 4 24 RTD Embedded Technologies Inc CHAPTER 5 CALCULATING FREQUENCIES VOLTAGES DM300 DM5300 dataModule AND BITS This chapter contains tables formulas and examples to help you understand the principles of V F conversion Included are ex amples which show how to calculate the timer binary and deci mal to gate the frequency counters and how to calculate the correction factor tables showing the expected output frequencies for selected input voltages for each input range and formulas for converting frequency to voltage and bits 5 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule 5 2 RTD Embedded Technologies Inc Chapter 5 Calculating Frequencies Voltages and Bits This chapter shows you how to calculate the contents of the 8254 timer which gates the 20 bit A D conversion counter in both binary bit based resolution and decimal voltage based resolution h
75. ur system before you connect to an IRQ channel DM300 DM5300 dataModule 4 22 RTD Embedded Technologies Inc Chapter 4 Module Operation and Programming Example Programs C Programs Included with the DM5300 is a set of example programs that demonstrate the use of many of the module s features These examples are in written in C and BASIC Also included is an easy to use menu driven diagnostics program 5300DIAG which is especially helpful when you are first checking out your module after installation and when calibrating the module Chapter 6 Before using the software included with your module make a backup copy of the disk You may make as many backups as you need These programs are source code files so that you can easily develop your own custom software for your DM5300 In the directory 5300 H and 5300 INC contain all of the functions needed to implement the main C programs H defines the addresses and INC contains the routines called by the main programs Analog to Digital READ Demonstrates basic operation of A D EXTTRIG Similar to READ except that an external trigger is used INTRPT MULTI Single and multiple channel A D conversions with interrupt Digital I O DIGITAL Simple program the shows how to read and write the digital I O lines Digital to Analog DAC Shows how to use the DAC Uses A D channel to monitor the output of the DAC Interrupts INTRPT Shows the bare essentials required for using interr
76. ured Settings 1 3 User Timer Counter Output Select Jumpers 1 4 User Timer Counter Clock Source Jumpers 4 1 4 8254 Timer Counter Circuit Block Diagram nennen ener ens 1 5 User Timer Counter Gate Source Jumpers sess enne en eerte 1 5 Single Ended Differential Analog Input Signal Type Jumpers eee 1 6 Analog Input Voltage Range and Polarity P7 sse enne enne entrent 1 6 DAC Output Voltage Range Jumper P8 eene eren nen 1 7 DAC 2 Output Voltage Range Jumper PO sess nete rerit 1 7 Base Address Switch 9 1 ied hac vata tes r 1 8 Adding Pull ups and Pull downs to Digital Lines 1 10 14 Trigger Input Select xcs n rtt ee e HR e PIRE Sodus e a SERE eterni 1 10 Gain Circuitry and Formula for Calculating nennen nennen 1 11 Diagram for Removal of Solder Short 1 11 P2 Connector Pin Assignments esee nennen trennen retener entente 2 4 Single Ended Input o n eet de e RR ER RUE HEEL 2 4 Differential Input Connectors iu edet RE ee rele RU EHI 2 5 Cascading Two Boards for Simultaneous Sampling essere nennen
77. ut Lets you communicate bidirectionally with an external device through Port A Handshaking is similar to Mode 1 These modes are detailed in the 8255 Data Sheet reprinted from Intel in Appendix C DM300 DM5300 dataModule 3 6 RTD Embedded Technologies Inc Interrupts Chapter 3 Hardware Description The DM5300 has two software selectable interrupt sources end of convert and external trigger The end of convert EOC line can be used to interrupt the computer when a conversion is completed When the 32 bit timer s count reaches 0 the counter gate closes the conversion is complete and the EOC line goes high When in the continuous convert mode the service time begins and you can read the data change the channel gain settings and reset the 20 bit counter The EOC line can be connected through software as shown in the I O Map discussion in Chapter 4 On power up the IRQ line is disabled Change the IRQ channel if necessary for your applica tion If you connect the end of convert to one of the interrupt channels an interrupt will occur when the line transitions from low converting to high not converting The external trigger interrupt source is set by Jumper J4 selecting either the TRIGGER IN P2 39 or the output of TIMER COUNTER 2 see page 1 10 When using the external trigger line as an external interrupt signal the polarity interrupt on rising or falling edge is set at BA 21 bit 1 We recommend that you have an understan
78. wn in Figure 1 13 a solder short labeled J7 must be removed from the module to activate the Gm circuitry This short is located on the bottom side of the board under R10 and R11 Figure 1 14 shows the location of the solder short DM300 DM5300 dataModule 1 10 RTD Embedded Technologies Inc Chapter 1 Module Settings Remove solder short see Figure 1 14 R1 0 To calculate Gm Gm TR3 R11 R10 1 Fig 1 13 Gain Circuitry and Formula for Calculating Gm LlTR3 R11 R10 TR4 Remove Solder Short Between These 2 Pads on Bottom Side of Board Fig 1 14 Diagram for Removal of Solder Short DM300 DM5300 dataModule 1 11 RTD Embedded Technologies Inc DM300 DM5300 dataModule 1 12 RTD Embedded Technologies Inc 2 MODULE INSTALLATION The DM5300 board is easy to install on your cpuModule or other PC 104 system This chapter tells you step by step how to install and connect the module After you have installed the module and made all of your connec tions you can turn your system on and run the 5300DIAG diagnos tics program included on your example software disk to verify that your module is working DM300 DM5300 dataModule 2 1 RTD Embedded Technologies Inc DM300 DM5300 dataModule 2 2 RTD Embedded Technologies Inc Chapter 2 Module Installation Module Installation Keep the module in its antistatic bag until you are ready to install it in your cpuModule or other PC 104

DM300/DM5300 User`s Manual - RTD Embedded Technologies, Inc.

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