HD6432633 Datasheet, PDF (175/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

Section 5 Interrupt Controller
5.1 Overview
5.1.1 Features
The H8S/2633 Series 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
Note: * This function is not available in the H8S/2695.
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