Datasheet

Rev. 3.00, 03/04, page 77 of 830
5.3.4 IRQ Sense Control Registers (ISCR16H, ISCR16L, ISCRH, ISCRL)
The ISCR registers select the source that generates an interrupt request at pins IRQ15 to IRQ0 or
pins ExIRQ15 to ExIRQ2.
• ISCR16H
Bit Bit Name Initial Value R/W Description
7
6
IRQ15SCB
IRQ15SCA
0
0
R/W
R/W
5
4
IRQ14SCB
IRQ14SCA
0
0
R/W
R/W
3
2
IRQ13SCB
IRQ13SCA
0
0
R/W
R/W
1
0
IRQ12SCB
IRQ12SCA
0
0
R/W
R/W
IRQn Sense Control B
IRQn Sense Control A
00: Interrupt request generated at low level of
IRQn or ExIRQn input
01: Interrupt request generated at falling edge
of IRQn or ExIRQn input
10: Interrupt request generated at rising edge of
IRQn or ExIRQn input
11: Interrupt request generated at both falling
and rising edges of IRQn or ExIRQn input
(n = 15 to 12)
• ISCR16L
Bit Bit Name Initial Value R/W Description
7
6
IRQ11SCB
IRQ11SCA
0
0
R/W
R/W
5
4
IRQ10SCB
IRQ10SCA
0
0
R/W
R/W
3
2
IRQ9SCB
IRQ9SCA
0
0
R/W
R/W
1
0
IRQ8SCB
IRQ8SCA
0
0
R/W
R/W
IRQn Sense Control B
IRQn Sense Control A
00: Interrupt request generated at low level of
IRQn or ExIRQn input
01: Interrupt request generated at falling edge
of IRQn or ExIRQn input
10: Interrupt request generated at rising edge of
IRQn or ExIRQn input
11: Interrupt request generated at both falling
and rising edges of IRQn or ExIRQn input
(n = 11 to 8)