65
Bit 2—Timer FL Interrupt Enable (IENTFL): Bit 2 enables or disables timer FL compare
match and overflow interrupt requests.
Bit 2: IENTFL
Description
0
Disables timer FL interrupts
(initial value)
1
Enables timer FL interrupts
Bit 1—Timer Y Interrupt Enable (IENTY): Bit 1 enables or disables timer Y overflow
interrupt requests.
Bit 1: IENTY
Description
0
Disables timer Y interrupts
(initial value)
1
Enables timer Y interrupts
Bit 0—Reserved Bit: Bit 0 is reserved: it is always read as 1, and cannot be modified.
For details of SCI3 interrupt control, see Serial Control Register 3 (SCR3), in section 10.3.2.
Interrupt Request Register 1 (IRR1)
Bit
7
6
5
4
3
2
1
0
IRRTA
IRRS1
—
IRRI4
IRRI3
IRRI2
IRRI1
IRRI0
Initial value
0
0
1
0
0
0
0
0
Read/Write
R/W
*
R/W
*
—
R/W
*
R/W
*
R/W
*
R/W
*
R/W
*
Note:
*
Only a write of 0 for flag clearing is possible.
IRR1 is an 8-bit read/write register, in which the corresponding bit is set to 1 when a timer A,
SCI1, or IRQ
4
to IRQ
0
interrupt is requested. The flags are not cleared automatically when an
interrupt is accepted. It is necessary to write 0 to clear each flag.
Bit 7—Timer A Interrupt Request Flag (IRRTA)
Bit 7: IRRTA
Description
0
[Clearing conditions]
(initial value)
When IRRTA = 1, it is cleared by writing 0
1
[Setting conditions]
When the timer A counter value overflows (goes from H'FF to H'00)