HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 638

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 17 Realtime Clock (RTC)
Rev. 3.00 Jan. 18, 2008 Page 576 of 1458
REJ09B0033-0300
Bit
4
3
2, 1
0
Bit Name
CIE
AIE
—
AF
Initial Value
0
0
All 0
0
R/W
R/W
R/W
R
R/W
Description
Carry Interrupt Enable Flag
When the carry flag (CF) is set to 1, the CIE bit
enables interrupts.
0: A carry interrupt is not generated when the CF
1: A carry interrupt is generated when the CF flag
Alarm Interrupt Enable Flag
When the alarm flag (AF) is set to 1, the AIE bit
allows interrupts.
0: An alarm interrupt is not generated when the
1: An alarm interrupt is generated when the AF
Reserved
These bits are always read as 0. The write value
should always be 0.
Alarm Flag
The AF flag is set when the alarm time, which is
set by an alarm register(ENB bit in RSECAR,
RMINAR, RHRAR, RWKAR, RDAYAR,
RMONAR, or RYRAR is set to 1), and counter
match.
0: Alarm register and counter not match
[Clearing condition]
When 0 is written to AF.
1: Alarm register and counter match*
[Setting condition]
When alarm register (only a register with ENB bit
set to 1) and counter match
Note:
flag is set to 1
is set to 1
AF flag is set to 1
flag is set to 1
*
Writing 1 holds previous value.