HD6417706 Datasheet, PDF (377/709 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

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).
13.3.7 Month Counter (RMONCNT)
The month counter (RMONCNT) is an 8-bit read/write register used for setting/counting in the
BCD-coded month section of the RTC. The count operation is performed by a carry for each
month of the date counter.
The range of month can be set is 00 to 12 (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.
RMONCNT is not initialized by a power-on reset or manual reset, or in standby mode.
Bit
7 to 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 month in the BCD-code.
The range can be set from 0 to 1 (decimal).
Counter for 1-unit of month in the BCD-code.
The range can be set from 0 to 9 (decimal).
Rev. 4.00, 03/04, page 331 of 660