SH7706 Datasheet, PDF (393/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

Bit
7 to 3
2 to 0
Section 13 Realtime Clock (RTC)
Bit Name Initial Value R/W

All 0
R


R/W
Description
Always read as 0.
Counter for the day of week in the BCD-code.
The range can be set from 0 to 6 (decimal).
Code Day of Week
0:
Sunday
1:
Monday
2:
Tuesday
3:
Wednesday
4:
Thursday
5:
Friday
6:
Saturday
13.3.6 Date Counter (RDAYCNT)
The date counter (RDAYCNT) is an 8-bit read/write register used for setting/counting in the BCD-
coded date section of the RTC. The count operation is performed by a carry for each day of the
hour counter.
The range of date can be set is 01 to 31 (decimal). Errant operation will result if any other value is
set. Carry out write processing after halting the count operation with the START bit in RCR2.
RDAYCNT is not initialized by a power-on reset or manual reset, or in standby mode.
The RDAYCNT range that can be set changes with each month and in leap years. Please confirm
the correct setting.
Bit
7, 6
5, 4
3 to 0
Bit Name Initial Value R/W

All 0
R


R/W


R/W
Description
Always read as 0.
Counter for 10-unit of date in the BCD-code.
The range can be set from 0 to 3 (decimal).
Counter for 1-unit of date in the BCD-code.
The range can be set from 0 to 9 (decimal).
Rev. 5.00 May 29, 2006 page 345 of 698
REJ09B0146-0500