Renesas H8 Series Hardware Manual

Section 3 Exception Handling
Rev. 7.00 Mar 10, 2005 page 77 of 652
REJ09B0042-0700
3.3 Interrupts
3.3.1 Overview
The interrupt sources include 13 external interrupts (WKP
7
to WKP
0
, IRQ
4
, IRQ
3
, IRQ
1
, IRQ
0
,
IRQAEC) and 9 internal interrupts from on-chip peripheral modules. Table 3.2 shows the interrupt
sources, their priorities, and their vector addresses. When more than one interrupt is requested, the
interrupt with the highest priority is processed.
The interrupts have the following features:
• Internal and external interrupts can be masked by the I bit in CCR. When the I bit is set to 1,
interrupt request flags can be set but the interrupts are not accepted.
• IRQ
4
, IRQ
3
, IRQ
1
, IRQ
0
, and WKP
7
to WKP
0
can be set to either rising edge sensing or falling
edge sensing, and IRQAEC can be set to either rising edge sensing, falling edge sensing, or
both edge sensing.

Renesas H8 Series Specifications

General

Brand	Renesas
Model	H8 Series
Category	Computer Hardware
Language	English