Datasheet

Section 5 Interrupt Controller
Rev. 3.00 Mar 17, 2006 page 98 of 926
REJ09B0283-0300
5.3.5 IRQ Status Register (ISR)
ISR is an IRQ15 to IRQ0 interrupt request flag register.
Bit Bit Name Initial Value R/W Description
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
IRQ15F
IRQ14F
IRQ13F
IRQ12F
IRQ11F
IRQ10F
IRQ9F
IRQ8F
IRQ7F
IRQ6F
IRQ5F
IRQ4F
IRQ3F
IRQ2F
IRQ1F
IRQ0F
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
[Setting condition]
When the interrupt source selected by ISCR
occurs
[Clearing conditions]
• Cleared by reading IRQnF flag when IRQnF
= 1, then writing 0 to IRQnF flag
• When interrupt exception handling is
executed when low-level detection is set
and IRQn input is high
• When IRQn interrupt exception handling is
executed when falling, rising, or both-edge
detection is set
• When the DTC is activated by an IRQn
interrupt, and the DISEL bit in MRB of the
DTC is cleared to 0
(n=15 to 0)
Note: * Only 0 can be written, to clear the flag.
5.3.6 IRQ Pin Select Register (ITSR)
ITSR selects input pins IRQ15 to IRQ0.
Bit Bit Name Initial Value R/W Description
15 ITS15 0 R/W Selects IRQ15 input pin.
0: PF2
1: P27
14 ITS14 0 R/W Selects IRQ14 input pin.
0: PF1
1: P26