SH7014 Datasheet, PDF (640/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Appendix A On-Chip Supporting Module Registers
INTC
IRQ Status Register (ISR)
H'FFFF835A
8/16/32
Item
Bit name
Initial value
R/W
Item
Bit name
Initial value
R/W
15
―
0
R
7
IRQ0F
0
R/W
14
―
0
R
6
IRQ1F
0
R/W
13
―
0
R
5
IRQ2F
0
R/W
Bit
12
11
―
―
0
0
R
R
4
3
IRQ3F
―
0
0
R/W
R
10
9
8
―
―
―
0
0
0
R
R
R
2
1
0
―
IRQ6F
IRQ7F
0
0
0
R
R/W
R/W
Bit
7 to 4,
1, 0
Name
IRQ0 to IRQ3, IRQ6, IRQ7
Flags (IRQ0F to IRQ3F, IRQ6F,
IRQ7F)
Detection
Value Setting
0 Level
detection
Description
No IRQn interrupt request exists.
Clear condition: When IRQn input is high
level
Edge
detection
No IRQn interrupt request was detected.
(initial value)
Clear conditions:
1. When a 0 is written after reading IRQnF
= 1 status
2. When IRQn interrupt exception
processing has been execute
1 Level
detection
An IRQn interrupt request exists.
Set condition: When IRQn input is low level
Edge
detection
An IRQn interrupt request was detected.
Set condition: When a falling edge occurs at
an IRQn input
Rev.5.00 Sep. 27, 2007 Page 606 of 716
REJ09B0398-0500