- Omega DIGITAL INPUT/OUTPUT User's Manual

Interrupts

The interrupt control registers function with the four 82C55 devices and the

82C54 counter timer to provide interrupt sources.

1. 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 can be individually

enabled.

2. 82C54 Counter

• Counter 1 OUT

• Counter 2 OUT

Note: Counters 1 and 2 interrupts are exclusive. Only

one counter can be enabled as an interrupt source at any

given time.

Interrupt sources

Rising / falling edge. Programmable through PLX-9052

High or low level. Programmable through PLX9052Interrupt polarity

Programmable through PLX9052 INTCSR PCI Interrupt enable

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

Crystal Oscillator

±100 ppmFrequency stability

16 MHzFrequency

AT-cut crystalOscillator type

Environmental

0 to 95% non-condensingHumidity

−40 to 70°C

Storage temperature range

0 to 70°COperating temperature range

Mechanical

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