IRR1—Interrupt request register 1
H'F6
System control
Bit
Initial value
Read/Write
7
IRRTA
0
R/W
*
6
—
0
R/W
5
—
1
—
3
IRRI3
0
R/W
*
0
IRRI0
0
R/W
*
2
IRRI2
0
R/W
*
1
IRRI1
0
R/W
*
4
IRRI4
0
R/W
*
IRQ4 to IRQ0 interrupt request flags
0
Clearing conditions:
When IRRIn = 1, it is cleared by writing 0
(n = 4 to 0)
Note:
*
Bits 7 and 4 to 0 can only be written with 0, for flag clearing.
1
Setting conditions:
When pin IRQn is designated for interrupt
input and the designated signal edge is input
Timer A interrupt request flag
0
Clearing conditions:
When IRRTA = 1, it is cleared by writing 0
1
Setting conditions:
When the timer A counter value overflows (rom H'FF to H'00)
444