66
Bit 6—SCI1 Interrupt Request Flag (IRRS1)
Bit 6: IRRS1
Description
0
[Clearing conditions]
(initial value)
When IRRS1 = 1, it is cleared by writing 0
1
[Setting conditions]
When an SCI1 transfer is completed
Bit 5—Reserved Bit: Bit 5 is reserved; it is always read as 1, and cannot be modified.
Bits 4 to 0—IRQ
4
to IRQ
0
Interrupt Request Flags (IRRI4 to IRRI0)
Bits 4 to 0:
IRRI4 to IRRI0
Description
0
[Clearing conditions]
(initial value)
When IRRIn = 1, it is cleared by writing 0 to IRRIn.
1
[Setting conditions]
IRRIn is set when pin
IRQ
n
is set to interrupt input, and the designated signal
edge is detected.
(n = 4 to 0)
Interrupt Request Register 2 (IRR2)
Bit
7
6
5
4
3
2
1
0
IRRDT
IRRAD
—
IRRTG
IRRTFH
IRRTFL
IRRTY
IRRTYC
Initial value
0
0
0
0
0
0
0
1
Read/Write
R/W
*
R/W
*
—
R/W
*
R/W
*
R/W
*
R
W
*
Note:
*
Only a write of 0 for flag clearing is possible.
IRR2 is an 8-bit register containing direct transfer, A/D converter, timer G, timer FH, timer FL,
and timer Y interrupt flags. When a direct transfer, A/D converter, timer G, timer FH, timer FL, or
timer Y interrupt is requested, the corresponding flag is set to 1. The flags are not cleared
automatically when an interrupt is accepted. It is necessary to write 0 to clear each flag. However,
the timer Y interrupt request flag (IRRTY) is cleared by writing 0 to bit 0 (IRRTYC).