Overview Of External Interrupt/Nmi Controller - Fujitsu MB91260B Series Hardware Manual

CHAPTER 6 EXTERNAL INTERRUPT AND NMI CONTROLLER
6.1

Overview of External Interrupt/NMI Controller

The external interrupt controller is a block that controls external interrupt requests input
to NMI and INT0 to INT9.
For external interrupt input, "H" level, "L" level, "rising edge", or "falling edge" can be
selected as the level of a request to be detected.
■ Register List
Following figure shows the register list of the external interrupt/NMI controller.
External interrupt source register
EIRR0 Address: 00000040
EIRR1 Address: 000000B8
Interrupt enable register
ENIR0 Address: 00000041
ENIR1 Address: 000000B9
External interrupt request level setting register
ELVR0 Address: 00000042
ELVR1 Address: 000000BA
ELVR0 Address: 00000043
ELVR1 Address: 000000BB
130
Bit No. →
7 6
ER7 ER6 ER5
H
– –
H
Bit No. →
7 6
EN7 EN6 EN5
H
– –
H
Bit No. →
15 14
LB7 LA7 LB6
H
– –
H
Bit No. →
7 6
LB3 LA3 LB2
H
– –
H
5 4 3 2
ER4 ER3 ER2
– – – –
5 4 3 2
EN4 EN3 EN2
– – – –
13 12 11 10
LA6 LB5 LA5
– – – –
5 4 3 2
LA2 LB1 LA1
LB9 LA9
– –
1 0 Initial value
00000000 [R/W]
ER1 ER0
B
- - - - - - 0 0 [R/W]
ER9 ER8
B
1 0 Initial value
00000000 [R/W]
EN1 EN0
B
- - - - - - 0 0 [R/W]
EN9 EN8
B
9 8 Initial value
00000000 [R/W]
LB4 LA4
B
- - - - - - - - [R/W]
– –
B
1 0 Initial value
00000000 [R/W]
LB0 LA0
B
----0000 [R/W]
LB8 LA8
B