SH7706 Datasheet, PDF (403/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

Section 13 Realtime Clock (RTC)
Bit
Bit Name Initial Value R/W Description
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. 5.00 May 29, 2006 page 355 of 698
REJ09B0146-0500