HD64F2149 Datasheet, PDF (132/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

5.1.2 Block Diagram
A block diagram of the interrupt controller is shown in Figure 5.1.
SYSCR
NMI input
IRQ input
INTM1 INTM0
NMIEG
NMI input unit
IRQ input unit
ISR
ISCR IER
Priority
determination
Interrupt
request
Vector
number
CPU
Internal interrupt
requests
SWDTEND to IBFI3
I, UI
CCR
ICR
Interrupt controller
Legend:
ISCR: IRQ sense control register
IER: IRQ enable register
ISR: IRQ status register
ICR: Interrupt control register
SYSCR: System control register
Figure 5.1 Block Diagram of Interrupt Controller
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