HD64F2357VF13 Datasheet, PDF (111/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 5 Interrupt Controller
5.1 Overview
5.1.1 Features
The H8S/2357 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.
Rev.6.00 Oct.28.2004 page 81 of 1016
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