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6.1.2
Block Diagram
A block diagram of the interrupt controller is shown in figure 6.1.
NM input
IRQ input
Internal
interrupt
requests
[Legend]
IEGR
IENR
IRQR
ICR
SYSCR
: IRQ edge select register
: IRQ enable register
: IRQ status register
: Interrupt control register
: System control register
NMI input unit
Interrupt
request
Vector
number
I, UI
IRQ input
unit IRQR
IEGR
IENR
ICR
CPU
Interrupt controller
SYSCR
INTM1, INTM0
NMIEG1, NMIEG0
CCR
Priority
determina-
tion
Figure 6.1 Block Diagram of Interrupt Controller
Summary of Contents for Hitachi H8S/2191
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