HD6417706 Datasheet, PDF (386/709 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

Bit
Bit Name Initial Value R/W Description
6
PES2
0
R/W Periodic Interrupt Flags
5
PES1
0
R/W These bits specify the periodic interrupt.
4
PES0
0
R/W 000: No periodic interrupts generated
001: Periodic interrupt generated every 1/256 second
010: Periodic interrupt generated every 1/64 second
011: Periodic interrupt generated every 1/16 second
100: Periodic interrupt generated every 1/4 second
101: Periodic interrupt generated every 1/2 second
110: Periodic interrupt generated every 1 second
111: Periodic interrupt generated every 2 seconds
3
RTCEN 1
R/W Controls the operation of the crystal oscillator for the
RTC.
0: Halts the crystal oscillator for the RTC.
1: Runs the crystal oscillator for the RTC.
2
ADJ
0
R/W 30 Second Adjustment
When 1 is written to the ADJ bit, times of 29 seconds
or less will be rounded to 00 seconds and 30 seconds
or more to 1 minute. The divider circuit will be
simultaneously reset. This bit always reads 0.
0: Runs normally.
1 : 30-second adjustment.
1
RESET 0
R/W Reset
When 1 is written, initializes the divider circuit (RTC
prescaler and R64CNT). This bit always reads 0.
0: Runs normally.
1: Divider circuit is reset.
0
START 1
R/W Start Bit
Halts and restarts the counter (clock).
0: Second/minute/hour/day/week/month/year counter
halts.
1: Second/minute/hour/day/week/month/year counter
runs normally.
Note: The R64CNT always runs unless stopped with
the RTCEN bit.
Rev. 4.00, 03/04, page 340 of 660