Specifications

Interrupt Controller (V40)
ZT 8832 SPECIFICS
The inputs to the interrupt controller are connected as shown in
Table 8-1.
Table 8-1
Interrupt Controller Inputs.
Input Connection
IRQ0 Counter/timer 0 output
IRQ1 V40 serial port or watchdog timer stage 1
IRQ2 Counter/timer 1 output
or SBX expansion module interrupt 0
IRQ3 SBX expansion module interrupt 1
IRQ4 82050 serial port
IRQ5 STD bus control port
IRQ6 Connector J3 pin 8
IRQ7 Connector J3 pin 10
The interrupt controller includes a cascade mode not supported by the
ZT 8832. Cascade mode is a scheme to expand the number of
interrupt request inputs by connecting seven slave interrupt controllers
to the inputs of a master interrupt controller. In this scheme, the
master interrupt controller must provide a cascade address to the slave
controllers during interrupt acknowledge. The cascade address is not
provided by the ZT 8832.
8-3