Datasheet

Section 5 Interrupt Controller
Page 136 of 1384 R01UH0310EJ0500 Rev. 5.00
Sep 25, 2012
H8S/2426, H8S/2426R, H8S/2424 Group
5.6 Interrupt Control Modes and Interrupt Operation
The interrupt controller has two modes: interrupt control mode 0 and interrupt control mode 2.
Interrupt operations differ depending on the interrupt control mode. The interrupt control mode is
selected by INTCR. Table 5.3 shows the differences between interrupt control mode 0 and
interrupt control mode 2.
Table 5.3 Interrupt Control Modes
Interrupt
Control Mode
Priority Setting
Registers
Interrupt
Mask Bits Description
0 Default I The priorities of interrupt sources are fixed at
the default settings.
Interrupt sources except for NMI is masked by
the I bit.
2 IPR I2 to I0 8 priority levels except for NMI can be set with
IPR.
8-level interrupt mask control is performed by
bits I2 to I0.