Operation Of The Delayed Interrupt Module - Fujitsu MB91319 Series Hardware Manual

CHAPTER 11 REALOS-RELATED HARDWARE
11.3

Operation of the Delayed Interrupt Module

A delayed interrupt refers to an interrupt generated for switching tasks. Use this
function to allow a software program to generate an interrupt request for the CPU or to
clear an interrupt request.
■ Interrupt Number
A delayed interrupt is assigned to the interrupt source corresponding to the largest interrupt
number.
On the MB91319, a delayed interrupt is assigned to interrupt number 63 (3F
■ DLYI Bit of DICR
Write 1 to this bit to generate a delayed interrupt source. Write 0 to it to clear a delayed interrupt
source.
This bit is the same as the interrupt source flag for a normal interrupt. Therefore, clear this bit and
switch tasks in the interrupt routine.
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