93
5.1.3
Pin Configuration
Table 5-1 summarizes the pins of the interrupt controller.
Table 5-1
Interrupt Controller Pins
Name
Symbol
I/O
Function
Nonmaskable interrupt
NMI
Input
Nonmaskable external interrupt; rising or
falling edge can be selected
External interrupt
requests 7 to 0
IRQ7
to
IRQ0
Input
Maskable external interrupts; rising, falling, or
both edges, or level sensing, can be selected
5.1.4
Register Configuration
Table 5-2 summarizes the registers of the interrupt controller.
Table 5-2
Interrupt Controller Registers
Name
Abbreviation
R/W
Initial Value
Address
*
1
System control register
SYSCR
R/W
H'01
H'FDE5
IRQ sense control register H
ISCRH
R/W
H'00
H'FE12
IRQ sense control register L
ISCRL
R/W
H'00
H'FE13
IRQ enable register
IER
R/W
H'00
H'FE14
IRQ status register
ISR
R/(W)
*
2
H'00
H'FE15
Interrupt priority register A
IPRA
R/W
H'77
H'FEC0
Interrupt priority register B
IPRB
R/W
H'77
H'FEC1
Interrupt priority register C
IPRC
R/W
H'77
H'FEC2
Interrupt priority register D
IPRD
R/W
H'77
H'FEC3
Interrupt priority register E
IPRE
R/W
H'77
H'FEC4
Interrupt priority register F
IPRF
R/W
H'77
H'FEC5
Interrupt priority register G
IPRG
R/W
H'77
H'FEC6
Interrupt priority register H
IPRH
R/W
H'77
H'FEC7
Interrupt priority register I
IPRI
R/W
H'77
H'FEC8
Interrupt priority register J
IPRJ
R/W
H'77
H'FEC9
Interrupt priority register K
IPRK
R/W
H'77
H'FECA
Interrupt priority register L
IPRL
R/W
H'77
H'FECB
Interrupt priority register O
IPRO
R/W
H'77
H'FECE
Notes: 1. Lower 16 bits of the address.
2. Can only be written with 0 for flag clearing.