Rev. 1.00, 09/03, page 74 of 704
Bit
Bit Name
Initial Value R/W
Description
3
2
IRQ1SCB
IRQ1SCA
0
0
R/W
R/W
IRQ1 Sense Control B
IRQ1 Sense Control A
00: Interrupt request generated at
IRQ1
input low
level
01: Interrupt request generated at falling edge of
IRQ1
input
10: Interrupt request generated at rising edge of
IRQ1
input
11: Interrupt request generated at both falling and
rising edges of
IRQ1
input
1
0
IRQ0SCB
IRQ0SCA
0
0
R/W
R/W
IRQ0 Sense Control B
IRQ0 Sense Control A
00: Interrupt request generated at
IRQ0
input low
level
01: Interrupt request generated at falling edge of
IRQ0
input
10: Interrupt request generated at rising edge of
IRQ0
input
11: Interrupt request generated at both falling and
rising edges of
IRQ0
input
5.3.5
IRQ Status Register (ISR)
ISR is an IRQ7 to IRQ0 interrupt request flag register.
Bit
Bit Name
Initial Value R/W
Description
7
6
5
4
3
2
1
0
IRQ7F
IRQ6F
IRQ5F
IRQ4F
IRQ3F
IRQ2F
IRQ1F
IRQ0F
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 ISCR
occurs
[Clearing conditions]
•
Cleared after reading condition1, when written as
0
•
When interrupt exception handling is executed
when low-level detection is set and
IRQn
input is
high
•
When IRQn interrupt exception handling is
executed while detecting the falling edge, rising
edge, or both
Note:
*
Only 0 can be written, to clear the flag.
Summary of Contents for H8S/2437
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