HD6433044 Datasheet, PDF (96/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

5.1.2 Block Diagram
Figure 5-1 shows a block diagram of the interrupt controller.
NMI
input
IRQ input
OVF
TM....... E
...
ADI
ADIE
ISCR IER
IRQ input
section ISR
IPRA, IPRB
Interrupt
Priority
request
decision logic
Vector
number
Interrupt controller
Legend
ISCR: IRQ sense control register
IER: IRQ enable register
ISR: IRQ status register
IPRA: Interrupt priority register A
IPRB: Interrupt priority register B
SYSCR: System control register
UE
SYSCR
Figure 5-1 Interrupt Controller Block Diagram
CPU
I
CCR
UI
82