Hitachi H8S/2378, H8S/2378R Series Hardware Manual page 118

A block diagram of the interrupt controller is shown in figure 5.1.
INTCR
NMI input
IRQ input
SSIER
Internal
interrupt
sources
SWDTEND
to IICI1
Interrupt controller
Legend
ISCR:
IER:
ISR:
IPR:
INTCR: Interrupt control register
ITSR:
SSIER: Software standby release IRQ enable register
Rev. 1.0, 09/01, page 74 of 904
INTM1 INTM0
NMIEG
NMI input unit
IRQ input unit
ISR
ITSR ISCR IER
IRQ sense control register
IRQ enable register
IRQ status register
Interrupt priority register
IRQ pin select register
Figure 5.1 Block Diagram of Interrupt Controller
Priority
determination
IPR
CPU
Interrupt
request
Vector
number
I
CCR
I2 to I0
EXR