SH7730 Datasheet, PDF (590/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

Section 17 Realtime Clock (RTC)
17.4 Operation
RTC usage is shown below.
17.4.1 Initial Settings of Registers after Power-On
All the registers should be set after the power is turned on.
17.4.2 Setting Time
Figure 17.2 shows how to set the time when the clock is stopped.
Stop clock,
reset divider circuit
Set seconds, minutes,
hour, day, day of the
week, month, and year
Start clock
Write 1 to RESET and 0 to
START in the RCR2 register
These settings may be set
in any order
Write 1 to START in the
RCR2 register
Figure 17.2 Setting Time
Rev. 1.00 Sep. 19, 2007 Page 542 of 1136
REJ09B0359-0100