User manual

19 Chapter 2
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. A user can setup
the configuration of interrupts
by programming the interrupt control regis-
ter.
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-3072L(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
flexibility.
2.5.4 IRQ Level
The IRQ level is by default set by the system BIOS. IRQ 7 is reserved for
DI
interrupt and counter interrupt.