Irq Status Registers (Isr16, Isr) - Renesas H8S/2158 User Manual

Section 5 Interrupt Controller
5.3.6

IRQ Status Registers (ISR16, ISR)

The ISR registers are flag registers that indicate the status of IRQ15 to IRQ0 interrupt requests.
ISR16
Bit Bit Name
7 IRQ15F
6 IRQ14F
5 IRQ13F
4 IRQ12F
3 IRQ11F
2 IRQ10F
1 IRQ9F
0 IRQ8F
ISR
Bit Bit Name
7 IRQ7F
6 IRQ6F
5 IRQ5F
4 IRQ4F
3 IRQ3F
2 IRQ2F
1 IRQ1F
0 IRQ0F
* ExIRQn stands for ExIRQ7 to ExIRQ2.
Note:
Rev. 3.00 Jan 25, 2006 page 82 of 872
REJ09B0286-0300
Initial Value R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
Initial Value R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
Description
[Setting condition]
When the interrupt source selected by the ISCR
registers occurs
[Clearing conditions]
•
When 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 or ExIRQn input is high
(n = 15 to 8)
•
When IRQn interrupt exception handling is
executed when falling-edge, rising-edge, or
both-edge detection is set
Description
[Setting condition]
When the interrupt source selected by the ISCR
registers occurs
[Clearing conditions]
•
When 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 or ExIRQn * input is high
(n = 7 to 0)
•
When IRQn interrupt exception handling is
executed when falling-edge, rising-edge, or
both-edge detection is set
(n = 7 to 0)