5.1.3 Pin Configuration
Table 5-1 lists the interrupt pins.
Table 5-1 Interrupt Pins
Name
Nonmaskable interrupt
External interrupt
request 5, 4, 1, and 0
5.1.4 Register Configuration
Table 5-2 lists the registers of the interrupt controller.
Table 5-2 Interrupt Controller Registers
1
Address*
Name
H'FFF2
System control register
H'FFF4
IRQ sense control register
H'FFF5
IRQ enable register
H'FFF6
IRQ status register
H'FFF8
Interrupt priority register A
H'FFF9
Interrupt priority register B
Notes: 1. Lower 16 bits of the address.
2. Only 0 can be written, to clear flags.
Abbreviation
I/O
NMI
Input
IRQ
, IRQ
,
Input
5
4
and IRQ
, IRQ
1
0
Function
Nonmaskable interrupt, rising edge or
falling edge selectable
Maskable interrupts, falling edge or level
sensing selectable
Abbreviation
R/W
SYSCR
R/W
ISCR
R/W
IER
R/W
ISR
R/(W)*
IPRA
R/W
IPRB
R/W
Initial Value
H'0B
H'00
H'00
2
H'00
H'00
H'00
83