Rev. 1.0, 02/00, page 99 of 1141
6.1.3
Pin Configuration
Table 6.1 summarizes the pins of the interrupt controller.
Table 6.1
Interrupt Controller Pins
Name
Symbol
I/O
Function
External interrupt
request 0
,54
3
Input
Maskable external interrupts; rising, falling, or both
edges can be selected
External interrupt
requests 1 to 5
,54
4
to
,54
8
Input
Maskable external interrupts: rising, or falling
edges can be selected
6.1.4
Register Configuration
Table 6.2 summarizes the registers of the interrupt controller.
Table 6.2
Interrupt Controller Registers
Name
Abbreviation
R/W
Initial Value
Address
*
1
System control register
SYSCR
R/W
H'00
H'FFE8
IRQ edge select register
IEGR
R/W
H'00
H'FFF0
IRQ enable register
IENR
R/W
H'00
H'FFF1
IRQ status register
IRQR
R/ (W)
*
2
H'00
H'FFF2
Interrupt control register A
ICRA
R/W
H'00
H'FFF3
Interrupt control register B
ICRB
R/W
H'00
H'FFF4
Interrupt control register C
ICRC
R/W
H'00
H'FFF5
Interrupt control register D
ICRD
R/W
H'00
H'FFF6
Port mode register 1
PMR1
R/W
H'00
H'FFCE
Notes: 1. Lower 16 bits of the address.
2. Only 0 can be written, for flag clearing.