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CHAPTER 4 DELAYED INTERRUPT
4.1
Outline of Delayed Interrupt Module
The delayed interrupt source module is used to generate interrupts for switching tasks.
Using this module, interrupt requests to the F
canceled by software.
■ Block Diagram of Delayed Interrupt
Figure 4.1-1 is a block diagram of the delayed interrupt source module.
2
F
MC-16LX bus
■ Notes on Operation
This lock is set by writing "1" to the corresponding bit of DIRR, and is cleared by writing "0" to the same
bit. Therefore, interrupt processing is reactivated immediately after control returns from interrupt
processing, unless the software is designed so that the cause of the interrupt is cleared within the interrupt
processing routine.
82
2
MC-16LX CPU can be issued and
Figure 4.1-1 Block Diagram
Delayed interrupt cause issuance/cancellation decoder
Cause latch
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