Omega Engineering OMG-PCI-DIO48 manual Interrupt mode select table

Technical Description

Interrupt control

When enabled interrupts are generated on A10 and A20 (Pin 47 on each 50 pin header), for this reason to use interrupts on a Port its A byte must be set as an input.

IRQENX	interrupt enable					1 = enabled			0 = disabled ( 0 on power up )
IRQCX0				Interrupt mode select see table
IRQCX1				Interrupt mode select see table
			Figure 12-Interrupt Control
Interrupt mode select table
			IRQCX1		IRQCX0			INT Type
			0		0			Low level
			0		1			High level
			1		0			Falling edge
			1		1			Rising edge
			Figure 13-Interrupt Mode
Interrupt Read
reading this port clears the interrupt
IRQST1		(D0) Interrupt status					1 = interrupt pending, 0 = none
IRQST2		(D4) Interrupt status					1 = interrupt pending, 0 = none

Figure 14-Interrupt Read

OMG-PCI-DIO48 Page 21