r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 135

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

5.1
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Any of two interrupt control modes can be set by means of the INTM1 and INTM0 bits in the
interrupt control register (INTCR).
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.
All interrupt sources are assigned independent vector addresses, making it unnecessary for the
source to be identified in the interrupt handling routine.
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 IRQn-A and IRQn-B.
Note:
DTC and DMAC activations are performed by means of interrupts.
Two interrupt control modes
Priorities settable with IPR
Independent vector addresses
External interrupt pins
DTC and DMAC control
Features
n = 15 to 0 for H8S/2456 Group and H8S/2456R Group, n = 7 to 0 for H8S/2454
Group
Section 5 Interrupt Controller
Rev. 1.00 Sep. 19, 2008 Page 105 of 1342
Section 5 Interrupt Controller
REJ09B0467-0100