7702 datasheet(64/217 Pages) RENESAS

Numer części	7702

Szczegółowy opis	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	217 Pages

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Producent	RENESAS [Renesas Technology Corp]

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7702/7703 Group User’s Manual

INTERRUPTS

4–2

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 M37702 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 FFD616 to FFFF16). Set the start address of each interrupt routine

at each interrupt vector address in the interrupt vector table.

4.1 Overview

Fig. 4.1.1 Interrupt processing sequence

Interrupt routine

Accept interrupt request

Resume processing

Suspend processing

Return

to original

routine

RTI instruction

Process interrupt

Executing routine

Branch

to start

address

of interrupt

routine

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