SH7713 Datasheet, PDF (550/904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 15 Realtime Clock (RTC)
The range of hour can be set is 0 to 23 (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.
RHRCNT is an 8-bit readable/writable register and not initialized by a power-on reset or manual
reset, or in standby mode.
Bit
7, 6
5, 4
3 to 0
Bit Name

Initial Value R/W
All 0
R


R/W


R/W
Description
Reserved
These bits are always read as 0.The write value
should always be 0.
Counter for 10-unit of hour in the BCD-code.
The range can be set from 0 to 2 (decimal).
Counter for 1-unit of hour in the BCD-code.
The range can be set from 0 to 9 (decimal).
15.3.5 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 an 8-bit readable/writable register and not initialized by a power-on reset or manual
reset, or in standby mode.
Rev.1.50 Aug. 30, 2006 Page 510 of 860
REJ09B0288-0150