Measurement-computing PCI-DIO96 Bedienungsanleitung PDF herunterladen (Seite 18)

Chapter 4

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Power consumption

Table 1. Power consumption specifications

+5V quiescent

150 mA max

Digital input/output

Table 2. Digital input/output specifications

Digital type

Four 82C55

Number of I/O

Configuration per 82C55

 2 banks of 8 and 2 banks of 4 or

 3 banks of 8 or

 2 banks of 8 with handshake

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)

Pull-up/pull-down resistors

User installed. Dual footprint allows pull-up or pull-down configuration

Counters

Table 3. Counters specifications

Counter type

82C54

Configuration

3 counters, 16 bits each

Counter 1

Source: 2 MHz (xtal /8)

Gate: Tied to +5V

Output: Selectable Interrupt source

Counter 2

Source: Counter 1 OUT

Gate: Tied to +5V

Output: Selectable interrupt source

Counter 3 - Not used

Source

Gate

Output

1 2 ... 13 14 15 16 17 18 19 20 21 22 23

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