Rev. 1.00, 09/03, page 66 of 704
A block diagram of the interrupt controller is shown in figure 5.1.
INTCR
NMI input
IRQ input
Internal
interrupt
sources
WOVI to
IICI3
INTM1, INTM0
NMIEG
NMI input unit
IRQ input unit
ISR
ISCR
IER
IPR
Interrupt controller
Priority
determination
Interrupt
request
Vector
number
I
I2 to I0
CCR
EXR
CPU
[Legend]
ISCR:
IRQ sense control register
IER:
IRQ enable register
ISR:
IRQ status register
IPR:
Interrupt priority register
INTCR: Interrupt control register
Figure 5.1 Block Diagram of Interrupt Controller
Содержание H8S/2437
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