H8SSLASH2214 datasheet(151/936 Pages) RENESAS

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Section 5 Interrupt Controller

Rev.4.00 Sep. 18, 2008 Page 91 of 872

REJ09B0189-0400

Section 5 Interrupt Controller

5.1

Overview

5.1.1

Features

The H8S/2214 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 or DMAC control

⎯ DTC or DMAC activation is performed by means of interrupts.

• Eight external expansion interrupt input pins

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