Interrupt Function Of The Di Signals; Irq Level - Advantech UNO-3072 User Manual

Celeron m/ pentium m embedded automation computer with two pci slot extensions

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Figure 2.5: Isolated Digital Input Connection

2.5.3 Interrupt Function of the DI Signals

DI0 and DI1 can be used to generate hardware interrupts. Users can setup

the configuration of them by programming the interrupt control register.

The channels are connected to the interrupt circuitry. Users can disable/

enable interrupt function, select trigger type or latch the port data by set-

ting the Interrupt Control Register of the UNO-3072 (refer to section 2.5.5

below). When the interrupt request signals occur, then the software will

service these interrupt requests by ISR (Interrupt Service Routine). The

multiple interrupt sources provide the card with more capability and flexi-

bility.

The IRQ level is by default set by the system BIOS. IRQ 7 is reserved for

DI interrupt and counter interrupt.

Chapter 2

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