Renesas H8S/2111B, Hardware Manual

Page: 107 / 582

Rev. 1.00, 05/04, page 73 of 544
5.3.5 IRQ Enable Register (IER)
IER controls the enabling and disabling of interrupt requests IRQ7 to IRQ0.
Bit Bit Name
Initial
Value R/W Description
7
6
5
4
3
2
1
0
IRQ7E
IRQ6E
IRQ5E
IRQ4E
IRQ3E
IRQ2E
IRQ1E
IRQ0E
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
IRQn Enable (n = 7 to 0)
The IRQn interrupt request is enabled when this bit is
1.
5.3.6 IRQ Status Register (ISR)
The ISR register is a flag register that indicates the status of IRQ7 to IRQ0 interrupt requests.
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 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
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
Note:
*
Only 0 can be written, for flag clearing.
5.3.7 Keyboard Matrix Interrupt Mask Registers (KMIMRA, KMIMR)
Wake-Up Event Interrupt Mask Register (WUEMRB)
The KMIMRA, KMIMR, and WUEMRB registers enable or disable key-sensing interrupt inputs
(
KIN15
to
KIN0
), and wake-up event interrupt inputs (
WUE7
to
WUE0
).