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Section 5 Interrupt Controller
Rev. 3.00 Mar. 14, 2006 Page 88 of 804
REJ09B0104-0300
A block diagram of the interrupt controller is shown in figure 5.1.
INTCR
IPR
NMI input
IRQ
input
Internal interrupt sources
WOVI to SSTXI2
INTM1, INTM0
NMIEG
NMI input unit
IRQ input unit
Interrupt controller
Priority
decision unit
Source selecter
CPU
interrupt request
CPU
vector
DMAC
activation
enable
I
I2 to I0
CCR
EXR
CPU
DMAC
INTCR:
CPUPCR:
ISCR:
IER:
Interrupt control register
CPU priority control register
IRQ sense control register
IRQ enable register
ISR:
SSIER:
IPR:
IRQ status register
Software standby release IRQ enable register
Interrupt priority register
[Legend]
ISCR
SSIER
IER
DMDR
CPUPCR
DMAC priority
control
ISR
Figure 5.1 Block Diagram of Interrupt Controller
5.2 Input/Output
Pins
Table 5.1 shows the pin configuration of the interrupt controller.
Table 5.1
Pin Configuration
Name I/O
Function
NMI Input
Nonmaskable
External
Interrupt
Rising or falling edge can be selected.
IRQ14
to
IRQ0
Input
Maskable External Interrupts
Rising, falling, or both edges, or level sensing, can be selected.
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