Block Diagram - Hitachi H8/3032 Series Hardware Manual

5.1.2 Block Diagram

Figure 5-1 shows a block diagram of the interrupt controller.
IRQ input
Legend
I:
IER:
IPRA:
IPRB:
ISCR:
ISR:
SYSCR:
UE:
UI:
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ISCR IER
NMI
input
IRQ input
section ISR
OVF
TME
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ADI
ADIE
Interrupt controller
Interrupt mask bit
IRQ enable register
Interrupt priority register A
Interrupt priority register B
IRQ sense control register
IRQ status register
System control register
User bit enable
User bit/interrupt mask bit
Figure 5-1 Interrupt Controller Block Diagram
IPRA, IPRB
Interrupt
request
Priority
decision logic
Vector
number
UE
SYSCR
76
CPU
I
CCR
UI