SH7727 Datasheet, PDF (546/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 16 Realtime Clock (RTC)
Confirm R64CNT is not 0
Stop clock
Reset divider circuit
Write 1 to RESET and
0 to START in the RCR2 register
Set seconds, minutes,
hour, day, day of the
week, month and year
Order is irrelevant
Confirm R64CNT is 0
Yes
Start clock
No
Write 1 to START in the RCR2 register
Figure 16.2(a) Setting the Time
* ^{Confirm R64CNT is not 0}
Stop clock
Reset divider circuit
Set seconds, minutes,
hour, day, day of the
week, month and year
Start clock
Reset divider circuit
Write 1 to RESET and
0 to START in the RCR2 register
Order is irrelevant
Write 1 to RESET and
1 to START in the RCR2 register
*
Confirm R64CNT is 0
No
Yes
*
Write to RCR2
Figure 16.2(b) Setting the Time
Rev. 5.00 Dec 12, 2005 page 474 of 1034
REJ09B0254-0500