HD643303x Hitachi, HD643303x Datasheet - Page 91

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

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:
ADIE
input
TME
OVF
NMI
ADI
.
.
.
.
.
.
.
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
Interrupt controller
ISCR
section ISR
IRQ input
IER
76
decision logic
IPRA, IPRB
Priority
Interrupt
request
Vector
number
SYSCR
UE
CPU
UI
I
CCR