Interrupt Function Of The Di Signals; Irq Level; Interrupt Control Register; Table 2.5:Interrupt Control Register Bit Map - Advantech UNO-3074 User Manual

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-3074 (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.

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.

2.5.5 Interrupt Control Register

Table 2.5: Interrupt Control Register Bit Map
Base Address
202H R/W
203H R/W
207H R/W
The Interrupt Control Register controls the function and status of each
interrupt signal source. Table 2.5 shows the bit map of the Interrupt Con-
trol Register. The register is readable/writeable register. While being writ-
ten, it is used as a control register; and while being read, it is used as a sta-
tus register.
DI0EN & DI1EN: DI0 & DI1 Interrupt disable/enable control bit
DI0TE & DI1TE: DI0 & DI1 Interrupt triggering edge control bit
DI0F & DI1F: DI0 & DI1 interrupt flag bit
7 6 5
Interrupt Enable Control/Status Register
Interrupt Triggering Edge Control/Status Register
Interrupt Flag/Clear Register
19
4 3 2 1 0
DI1EN DI0EN
DI1TE DI0TE
DI1F DI0F
Chapter 2