Irq Status Registers (Isr16, Isr) - Renesas H8S Family Hardware Manual

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 to 0 IRQ15F to
IRQ8F
IRQn stands for IRQ15 to IRQ8.
Note: *
• ISR
Bit Bit Name
7 to 0 IRQ7F to
IRQ0F
IRQn stands for IRQ7 to IRQ0.
Note: *
Initial
Value
R/W Description
All 0 R/W [Setting condition]
•
[Clearing conditions]
•
•
•
(n = 15 to 8)
Initial
Value R/W Description
All 0 R/W [Setting condition]
•
[Clearing conditions]
•
•
•
(n = 7 to 0)
When the interrupt source selected by the ISCR16
registers occurs
When reading 1, then writing 0
When interrupt exception handling is executed when
low-level detection is set and IRQn* or ExIRQn input is
high
When IRQn interrupt exception handling is executed
when falling-edge, rising-edge, or both-edge detection
is set
When the interrupt source selected by the ISCR
registers occurs
When reading 1, then writing 0
When interrupt exception handling is executed when
low-level detection is set and IRQn* or ExIRQn input is
high
When IRQn interrupt exception handling is executed
when falling-edge, rising-edge, or both-edge detection
is set
Rev. 1.00 Mar. 12, 2008 Page 85 of 1178
Section 5 Interrupt Controller
REJ09B0403-0100