SH7720 Datasheet, PDF (629/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 17 Realtime Clock (RTC)
17.3.5 Day of Week Counter (RWKCNT)
RWKCNT is used for setting/counting day of week section. The count operation is performed by a
carry for each day of the date counter.
The range for day of the week can be set is 0 to 6 (decimal). Errant operation will result if any
other value is set. Carry out write processing after stopping the count operation with the START
bit in RCR2.
RWKCNT is not initialized by a power-on reset or manual reset, or in standby mode.
Bit
7 to 3
2 to 0
Bit Name

Initial Value R/W
All 0
R

Undefined R/W
Description
Reserved
These bits are always read as 0. Though writing
has n effect, the write value should always be 0.
Day-of-Week Counting
Day-of-week is indicated with a binary code.
000: Sunday
001: Monday
010: Tuesday
011: Wednesday
100: Thursday
101: Friday
110: Saturday
111: Reserved (setting prohibited)
Rev. 3.00 Jan. 18, 2008 Page 567 of 1458
REJ09B0033-0300