Measurement-computing CIO-DAS08-AOH Manual de usuario Pagina 25
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Counter section
Counter type 82C54
Configuration 3 down counters, 16 bits each
Counter 0 - independent, user configurable
Source: user connector (Counter 0 In)
Gate: tied high through 10k (enabled)
Output: user connector (Counter 0 Out)
Counter 1 - independent, user configurable
Source: user connector (Counter 1 In)
Gate: user connector (Gate 1)
Output: user connector (Counter 1 Out)
Counter 2 - independent, user configurable
Source: 1MHz (from 10MHz Xtal via divide-by-ten) or PC SysClk (via divide by 2 circuit)
selectable by jumper
Gate: user connector (Gate 2)
Output: user connector (Counter 2 Out)
Clock input frequency 10 Mhz max
High pulse width (clock input) 30 ns min
Low pulse width (clock input) 50 ns min
Gate width high 50 ns min
Gate width low 50 ns min
Input low voltage 0.8V max
Input high voltage 2.0V min
Output low voltage 0.4V max
Output high voltage 3.0V min
Environmental
Operating temperature range 0 to 50°C
Storage temperature range −20 to 70°C
Humidity 0 to 95% non-condensing
21
- Revision 5 1
- October, 2000 1
- HM CIO-DAS08_AOx.lwp 2
- TABLE OF CONTENTS 3
- This page is blank 4
- 1 INTRODUCTION 5
- 2 SOFTWARE INSTALLATION 5
- 3 HARDWARE INSTALLATION 6
- 3.2 INTERRUPT LEVEL SELECT 7
- 3.3 XTAL/PC BUS CLOCK JUMPER 7
- 3.4 WAIT STATE 8
- 3.5 D/A RANGE SWITCH 8
- D/A Simultaneous 9
- Update Jumper 9
- 4 CALIBRATION AND TEST 10
- 5 SIGNAL CONNECTION 11
- 5.4 DIGITAL I/O CONNECTOR 12
- 6 CIO-DAS08-AOx ARCHITECTURE 13
- 6.2 A/D DATA REGISTER 14
- CIO-DAS08-AOL GAIN/RANGES 16
- 6.7 COUNTER TIMER OPERATION 18
- 6.6 COUNTER CONTROL REGISTER 18
- 6.8 D/A 0 CONTROL REGISTERS 19
- 6.9 D/A 1 CONTROL REGISTERS 20
- 7 SPECIFICATIONS 23
- Analog Output: 24
- Digital Input / Output 24
- Counter section 25
- Environmental 25
- 8 APPLICATION NOTES 26
- 8.3 COMMON MODE RANGE 27
- 8.4 COMMON MISUNDERSTANDINGS 28
- 8.5 GROUND LOOPS 28
- 8.7 LOW PASS FILTERS 29
- For Your Notes 30
- EC Declaration of Conformity 31
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