62
Bits 15 to 0—IRQ15 Sense Control A and B (IRQ15SCA, IRQ15SCB) to IRQ0 Sense
Control A and B (IRQ0SCA, IRQ0SCB)
IRQnSCB
IRQnSCA
Description
0
0
Interrupt request generated at
IRQn
input low level
(Initial value)
1
Interrupt request generated at falling edge of
IRQn
input
1
0
Interrupt request generated at rising edge of
IRQn
input
1
Interrupt request generated at both falling and rising edges of
IRQn
input
(n = 15 to 0)
3.3.5
IRQ Status Register (ISR)
Bit
15
14
13
12
11
10
9
8
IRQ15F
IRQ14F
IRQ13F
IRQ12F
IRQ11F
IRQ10F
IRQ9F
IRQ8F
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
Bit
7
6
5
4
3
2
1
0
IRQ7F
IRQ6F
IRQ5F
IRQ4F
IRQ3F
IRQ2F
IRQ1F
IRQ0F
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
R/(W)
*
Note:
*
Only 0 can be written, to clear the flag.
ISR is a 16-bit readable/writable register that indicates the status of IRQ15 to IRQ0 interrupt
requests.
ISR is initialized to H'0000 by a reset and in hardware standby mode.
As IRQnF may be set to 1 depending on the pin states after a reset, it is necessary to read ISR, and
then write 0s to it, following a reset.
Содержание H8S/2670
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