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Diamond Systems Corporation
Copyright 2001
User Manual V1.1
PC/104 Module
Bit Analog Output Channel 12 16
RUBY
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TABLE OF CONTENTS ................................ ................................ ................................ ................................ .......... 3 ................................ ................................ ................................ .............................. 4 ................................ ................................ ................................ .................... 5 ................................ ................................
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- MM - - 1. DESCRIPTION - MM - - - MM - - ⇒ ⇒ - - - . An Ω pull - - MM - - - 3 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. re DC/DC converters. own ±15V supplies for the analog circuitry on board using four miniatu 1612 requires only +5VDC from the system power supply for operation. It generates its Ruby +5V Operation Each line is CMOS / TTL compatible and can supply up to ±2.5mA of current. r. up resisto An 82C55 chip is include
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2. I/O HEADER PINOUT - MM - - - - - 1 2 3 4 5 6 7 8 9 V - 0 - 0, B7 - - 0 ⇒ ⇒ - - 4 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. connection points for convenience purposes only. are provided as The +5V and Dgnd lines do not need to be connected to a power supply to use this board. They Note: Digital groun
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3. BOARD CONFIGURATION - - 8 – - - - - - MM - 9 8 7 6 5 4 Out Out Out Out 3 00 Out Out Out - - 5 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. In Out Out Out Out Out 992 3E0 In In Out Out Out Out 960 3C0 In Out In Out Out Out 928 3A0 In In Out Out Out 912 390 In In In
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4. ANALOG OUTPUT RANGE CONFIGURATION - - 8 - full - - On - - - - - - 5 - - - on - - F - A - U B - - A - - 6 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. reads the desired voltage. he top of the board) until the voltmeter the left / second from the right in the row of blue potentiometers at t (the fourth from R4 mark and turn the screw on potentiometer underneath either J4 top pin of header set anywhere between 0V and 2.5V. To adjust
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5 F A B U 0 - X X X 0 - X X +/ - X X X +/ - X X 0 - X X X X X +/ - X X X X X ⇒ ⇒ - - - - 7 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. However, all eight channels within a bank will always have the same output range. etting. 15) can have a different output range s 7 and 8 Each bank of eight channels (0 Note: Positions F A B U are repeated for each bank of 8 channels. An X means that a jumper is installed in th
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5. RUBY - MM - 1612 BOARD DRAWING - - - - 8 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. ISP header for factory use only; do not connect J6: Base address selection header J5: ader Analog output range configuration he J4: User I/O header J3: bit bus header (not used) PC/104 16 J2: bit bus header PC/104 8 J1:
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6. I/O MAP - MM - - - - Ruby - - 0 1 D 2 3 4 5 6 7 • - - • • - - 9 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. get a complete understanding of the board’s operation. in order to The next chapter describes all registers on the board. You should familiarize yourself with these registers All digital I/O lines are set to input mode. The external trigger register is set to 0, disabling external trigger. ranges
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7. REGISTER DEFINITIONS Bit No. 7 6 5 4 3 2 1 0 - 0 - Bit No. 7 6 5 4 3 2 1 0 X X X X X - 8 - Bit No. 7 6 5 4 3 2 1 0 X X X X X B - 0 - - 10 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. D/A Channel no. There are 16 channels numbered 0 to 15. CH3 it not used. These bits will be ignored. CH0 CH1 CH2 CH3 Name Base + 2, Write: DAC channel register written to them will change. The remaining channels will retai
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Bit No. 7 6 5 4 3 2 1 0 X X X X X X X X Ext ernal trigger enable. 1 = enable, 0 = disable. When external trigger is enabled, digital I/O line C0 will update all DACs simultaneously when it is brought low. This can be done either by an external signal, when C0 is in input mode, or in software, when C 0 is in These registers map directly to the 82C55 digital I/O chip. The definitions of these registers can be found in the 82C55 datasheet appended to the back of this m
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8. 82C55 DIGITAL I/O CH IP OPERATION D 2 1 DirA DirB The Bit No. 7 6 5 4 3 2 1 0 1 DirA DirB 1 – – – – - - 12 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. (all ports output) Output Output Output 128 80 Input Output Output 137 89 Output Input Output 130 82 Input Input Output 139 8B Output Output Input 144 90 Inpu
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9. ANALOG OUTPUT RANGES AND RESOLUTION - - - - MM - - - bit. Full - 0 - 2.44mV 0 - 1.22mV 0 - 0.61mV - 4.88mV - 2.44mV - 1.22mV , - - 13 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. refers to the output voltage for a code of 4095. positive full scale refers to the output voltage for a code of 0, and negative full scale In the table above +2.4988V 2.5V ±2.5V Bipolar 2.5V +4.9963V 5V ±5V Bipolar 5V +9
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10. D/A CODE COMPUTATION - For For - - MM - 12 le 12 - - bit. - - - - - - - - 0 1 cale - ⇒ ⇒ - - - - - - - 14 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. phenomenon is true for all D/A and A/D converters. This results in a maximum output voltage of full scale minus 1 LSB for any analog output range. This 1. er. The highest number that can be output is 4095, which is 4096 bit D/A convert reproduced on
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- - - - - - - - - - - - - - - ± ± 0 - 1 - - - - - ⇒ ⇒ - full - - - 15 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. voltage, but since that is impossible, the maximum output voltage is 1 LSB less then positive full scale. le output sca Again, an output code of 4096 would be required to generate the positive Note: +4.9976V 1 LSB Positive full scale 4095 +.0024V (+2.44mV) +1 LSB 2049 0V 0V 2048 2.44mV) .0024V
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11. HOW TO GENERATE AN A NALOG OUTPUT ). - MM - - - - ⇒ ⇒ - ⇒ ⇒ - - 16 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. If hardware updating is enabled, software updating will still work. Note: 15 will stay the same. channel 0, then only channel 0 will change, and channels 1 us update on all channels but you only wrote data to the last update. For example, if you do a simultaneo When a channel is updated, its output will chang
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- - LSB = 9 - - LSB = LSB = 4 - - 17 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. tages. other channels remain at their existing output vol Read from base + 0. DAC 0 and DAC3 are both updated to their new output voltages. All Step 7. to base + 1 (MSB register). The value 1229 is written to DAC 1. Write Step 6. base + 2 (Channel register). Write 0 to Step 5. to base + 0 (LSB register). 205 Write Step 4. to
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12. CALIBRATION PROCEDUR E ⇒ ⇒ - - - - – – - - – - - 18 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. 4.999V. so that the voltmeter reads R5 . Adjust “B” rightmost under the on J4. Connect the voltmeter to the upper pin on J4 “F” rightmost and the “5” itions Install jumpers in pos 15 Scale Reference Adjust, Channels 8 Negative Full desired by measuring the actual D/A output. 5.000V when it is loaded with all zeros. This value can be ad
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13. SPECIFICATIONS 0 - - ± ± - ± 6 μ ± ± ± - ± Ω All - - - - ± - Ω Ω - ± o - C - - - - - 19 P. 1612 User Manual V1.1 MM Ruby Copyright 2001 Diamond Systems Corp. through function but is not used on board) pass bit header can be installed for (16 8 bits Data bus 3.55” x 3.775” Size condensing 5 to 95% non Operating humidity 40 to +85 perature Operating tem 430mA, all outputs unloaded Current requirement
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82C55A CMOS Programmable June 1998 Peripheral Interface Features Description • Pin Compatible with NMOS 8255A The Intersil 82C55A is a high performance CMOS version of the industry standard 8255A and is manufactured using a • 24 Programmable I/O Pins self-aligned silicon gate CMOS process (Scaled SAJI IV). It is a general purpose programmable I/O device which may be • Fully TTL Compatible used with many different microprocessors. There are 24 I/O • High Speed, No “Wait State” Operation with 5MHz
