h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 175

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

5.5
5.5.1
Interrupt operations in the H8S/2138 Group and H8S/2134 Group differ depending on the
interrupt control mode.
NMI and address break interrupts are accepted at all times except in the reset state and the
hardware standby state. In the case of IRQ interrupts and on-chip supporting module interrupts, an
enable bit is provided for each interrupt. Clearing an enable bit to 0 disables the corresponding
interrupt request. Interrupt sources for which the enable bits are set to 1 are controlled by the
interrupt controller.
Table 5.5 shows the interrupt control modes.
The interrupt controller performs interrupt control according to the interrupt control mode set by
the INTM1 and INTM0 bits in SYSCR, the priorities set in ICR, and the masking state indicated
by the I and UI bits in the CPU’s CCR.
Table 5.5
Interrupt
Control Mode INTM1 INTM0
0
1
Interrupt Operation
Interrupt Control Modes and Interrupt Operation
Interrupt Control Modes
0
SYSCR
0
1
Priority Setting
Register
ICR
ICR
Interrupt
Mask Bits
I
I, UI
Rev. 4.00 Jun 06, 2006 page 121 of 1004
Description
Interrupt mask control is
performed by the I bit
Priority can be set with ICR
3-level interrupt mask control
is performed by the I and UI
bits
Priority can be set with ICR
Section 5 Interrupt Controller
REJ09B0301-0400