Measurement-computing PCI-DIO24/S Instrukcja Użytkownika Pobierz pdf (Strona 15)

Chapter 4

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Digital input/output

Table 1. Digital I/O specifications

Digital type

82C55

Number of I/O

24 (Port A0 through Port C7)

Configuration

2 banks of 8 and 2 banks of 4 or

3 banks of 8 or

2 banks of 8 with handshake

Input low voltage

0.8 V max

Input high voltage

2.2 V min

Output low voltage (IOL = 2.5 mA)

0.5 V max

Output high voltage (IOH = -2.5 mA)

2.4 V min

Absolute maximum input voltage

-0.5 V, +6 V

Power-up / reset state

Input mode (high impedance)

Pull-up/pull-down resistors

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

Interrupts

Table 2. Interrupt specifications

Interrupts

INTA# - mapped to IRQn via PCI BIOS at boot-time

Interrupt enable

External (IRQ_ENABLE) active low, disabled by default through internal resistor to TTL

high and programmable through PLX9030

Interrupt sources

External source (IRQ_INPUT)

Polarity programmable through PLX9030

Edge or level triggered programmable through PLX9030

Assertion time: 40 ns min

Power consumption

Table 3. Power consumption specifications

+5 V operating

240 mA typical, 350 mA max. Does not include power consumed through

the I/O connector.

+5 V available at I/O connector

300 mA max, protected with a resettable fuse

Resettable fuse

Raychem type miniSMDC110.

Hold current: 1.1 A max

Series resistance 0.21 Ohms max.

Environmental

Table 4. Environmental specifications

Operating temperature range

0 to 70°C

Storage temperature range

-40 to 100°C

Humidity

0 to 95% non-condensing

1 2 ... 10 11 12 13 14 15 16 17 18

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