Section 5
Interrupt Controller
Rev. 1.00 Apr. 28, 2008 Page 97 of 994
REJ09B0452-0100
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
Initial Value R/W
Description
7
6
5
4
3
2
1
0
IRQ15F
IRQ14F
IRQ13F
IRQ12F
IRQ11F
IRQ10F
IRQ9F
IRQ8F
0
0
0
0
0
0
0
0
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
[Setting condition]
When the interrupt source selected by the ISCR16
registers occurs
[Clearing conditions]
•
When writing 0 to IRQnF flag after reading
IRQnF = 1
•
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
(n = 15 to 8)
Note: The
IRQn
or
ExIRQn
pin is selected by the
IRQ sense port select register 16 (ISSR16).
Note:
*
Only 0 can be written for clearing the flag.
Содержание H8S/2100 Series
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