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INTERRUPTS
4.1 Overview
The suspension of the current operation in order to perform another operation owing to a certain factor is
referred to as "Interrupt." This chapter describes the interrupts.
4.1 Overview
The M37751 has 19 interrupt sources to generate interrupt requests.
Figure 4.1.1 shows the interrupt processing sequence.
When an interrupt request is accepted, a branch is made to the start address of the interrupt routine set
in the interrupt vector table (addresses FFD6
to FFFF
). Set the start address of each interrupt routine
16
16
at each interrupt vector address in the interrupt vector table.
Executing routine
Interrupt routine
Process interrupt
Accept interrupt request
Suspend processing
Resume processing
RTI instruction
Fig. 4.1.1 Interrupt processing sequence
7751 Group User's Manual
4–2
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