Measurement-computing CIO-DIO24/CTR3 Manual de usuario Pagina 18
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Chapter 5
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Digital Input / Output
Table 1. Digital input/output specifications
Digital type 82C55
Configuration 2 banks of 8, 2 banks of 4, programmable by bank as input or output
Number of channels 24 I/O
Output high 3.0 volts min @ -2.5 mA
Output low 0.4 volts max @ 2.5 mA
Input high 2.0 volts min, 5.5 volts absolute max
Input low 0.8 volts max, -0.5 volts absolute min
Power-up / reset state Input mode (high impedance)
Interrupts 2 through 7, jumper selectable
Interrupt enable External (IR Enable), logic low enabled (disabled by default via internal
10k resistor to +5V)
Interrupt sources External (IR Input), rising edge
Miscellaneous Locations provided for installation of pull-up or pull-down resistors.
Counters
Table 2. Power consumption specifications
Counter type 82C54
Configuration 3 down counters, 16-bits each
Counter 0 - independent, user configurable Source: User connector (CLK0) and optionally, 10MHz
on-board xtal oscillator, selectable by jumper
Gate: User connector (GATE0)
Output: User connector (OUT0) and optionally, counter 1 clock
input, selectable by jumper
Counter 1 - independent, user configurable Source: User connector (CLK1) and optionally, counter 0
output, selectable by jumper
Gate: User connector (GATE1)
Output: User connector (OUT1) and optionally, counter 2 clock
input, selectable by jumper
Counter 2 - independent, user configurable Source: User connector (CLK2) and optionally, counter 1
output, selectable by jumper
Gate: User connector (GATE2)
Output: User connector (OUT2)
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 0.8 V max
Input high voltage 2.0 V min
Output low voltage 0.4 V max
18
- CIO-DIO24/CTR3 2
- HM CIO-DIO24-CTR3.doc 3
- Table of Contents 4
- About this User's Guide 5
- Software features 6
- Optional components 7
- Unpacking the CIO-DIO24/CTR3 8
- Installing the software 8
- Base address 9
- Wait state 11
- Clock source 11
- Cabling 14
- 2.2KOhm SIP 15
- Dot indicates the 15
- (LO or HI) 15
- I/O Lines 15
- Digital I/O Isolation 16
- Register-level programming 17
- Programming languages 17
- Specifications 18
- Power consumption 19
- Environmental 19
- Main connector and pin out 19
- Declaration of Conformity 20
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