HD6432351 datasheet(125/1025 Pages) RENESAS

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Section 5 Interrupt Controller

Rev. 3.00 Sep 15, 2006 page 91 of 988

REJ09B0330-0300

Section 5 Interrupt Controller

5.1

Overview

5.1.1

Features

The H8S/2350 Group controls interrupts by means of an interrupt controller. The interrupt

controller has the following features:

• Two interrupt control modes

 Any of two interrupt control modes can be set by means of the INTM1 and INTM0 bits in

the system control register (SYSCR).

• Priorities settable with IPR

 An interrupt priority register (IPR) is provided for setting interrupt priorities. Eight priority

levels can be set for each module for all interrupts except NMI.

 NMI is assigned the highest priority level of 8, and can be accepted at all times.

• Independent vector addresses

 All interrupt sources are assigned independent vector addresses, making it unnecessary for

the source to be identified in the interrupt handling routine.

• Nine external interrupts

 NMI is the highest-priority interrupt, and is accepted at all times. Rising edge or falling

edge can be selected for NMI.

 Falling edge, rising edge, or both edge detection, or level sensing, can be selected for IRQ7

to IRQ0.

• DTC and DMAC control

 DTC and DMAC activation is performed by means of interrupts.

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