Measurement Computing CIO-DAS160x/1x - Manual (Page 42)

Digital Input / Output
Digital Type (Digital I/O connector) 82C55 (not applicable on -P5 versions)
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
Digital Type (Main analog connector)
Output 74LS197
Input 74LS244
Configuration 4 fixed input, 4 fixed output
Number of channels 8
Output High 2.7 volts @ -0.4 mA min
Output Low 0.5 volts @ 8 mA max
Input High 2.0 volts min, 7 volts absolute max
Input Low 0.8 volts max, -0.5 volts absolute min
Counter section
Counter type 82C54
Configuration 3 down-counters, 16 bits each
Counter 0 - Independent, user configurable
Source: Programmable - Internal 100 kHz or external (CTR0 Clock In)
Gate: External (DIn2)
Output: Available at user connector (CTR0 Out)
Counter 1 - ADC Pacer Lower Divider
Source: 1 or 10 MHz oscillator (jumper selectable)
Gate:
Tied to Counter 2 gate, programmable source.
Output: Chained to Counter 2 Clock.
Counter 2 - ADC Pacer Upper Divider
Source: Counter 1 Output.
Gate: Tied to Counter 1 gate, programmable source.
Output: ADC Pacer clock
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 90% non-condensing
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