Measurement-computing CIO-DAS16/M1 Manuel d'utilisateur télécharger pdf (Page 29)

Digital Input / Output

Digital Type (Main Connector)

Input: 74LS244

Output: 74LS175

Configuration Two dedicated ports, 4 input and 4 output

Output High 2.7 volts @ -0.4mA min

Output Low 0.4 volts @ 8 mA min

Input High 2.0 volts min, 7 volts absolute max

Input Low 0.8 volts max, -0.5 volts absolute min

Digital Type (Auxiliary Connector) 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 @ -2.5mA

Output Low 0.4 volts max @ 2.5mA

Input High 2.0 volts min, 5.5 volts absolute max

Input Low 0.8 volts max, -0.5 volts absolute min

Interrupts Prog. levels 2-7, 10-12, 14, 15; Positive edge triggered

Interrupt enable Programmable

Interrupt sources A/D End-of-conversion, A/D FIFO half full, A/D Residual

Counter

Counter section

Counter type 82C54

Configuration 3 down counters, 16 bits each

Counter 0 - General purpose counter or ADC residual sample

counter when using REPINSW.

Source: Programmable: external (CTR0IN), internal (1MHz

osc) or ADC pacer (when using REPINSW).

Gate: Programmable source: external (DIN2) or internal

(when using REPINSW)

Output: Programmable: user connector, end-of-acquisition

interrupt (when using REPINSW).

Counter 1 - ADC Pacer Lower Divider

Source: 10 MHz oscillator

Gate: Tied to Counter 2 gate, programmable source: external

(DIN1) or internal.

Output: Chained to Counter 2 Clock.

Counter 2 - ADC Pacer Upper Divider

Source: Counter 1 Output.

Gate: Tied to Counter 1 gate, programmable source: external

(DIN1) or internal.

Output: ADC Pacer clock, output available at user connector

(CTR2 Out).

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 37 38

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Measurement-computing CIO-DAS16/M1 Manuel d'utilisateur Page 29

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