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Interrupts, Crystal oscillator, Environmental – Measurement Computing PCI-DIO96 User Manual

Page 19: Mechanical

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PCI-DIO96 User's Guide

Specifications

19

Interrupts

The interrupt control registers allow the four 82C55 devices and the 8254 counter timer to be used as interrupt
sources.

Table 4. Interrupt specifications

Interrupt

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

PCI Interrupt enable

Programmable through PLX9052 INTCSR register (INTCSR 4Ch)

Interrupt polarity

High or low level. Programmable through PLX9052

Rising or falling edge. Programmable through PLX9052

Interrupt sources

82C55 in Mode 1 or Mode 2 interrupt configuration:
 First Port C0
 First Port C3
 Second Port C0
 Second Port C3
 Third Port C0
 Third Port C3
 Fourth Port C0
 Fourth Port C3
Note: Any interrupt source above may be individually enabled.

82C54 Counter
 Counter 1 OUT
 Counter 2 OUT
Note: Counter 1 and 2 interrupts are exclusive. Only one counter may be
enabled as an interrupt source at one time.

Crystal oscillator

Table 5. Crystal oscillator specifications

Oscillator type

AT-cut crystal

Frequency

16 MHz

Frequency stability

±100 ppm

Environmental

Table 6. Environmental specifications

Operating temperature range

0 to 70 °C

Storage temperature range

-40 to 70 °C

Humidity

0 to 95% non-condensing

Mechanical

Table 7. Mechanical specifications

Card dimensions

PCI short card: 136.0 mm (L) x 100.6 mm (W) x11.00 mm (H)