HD6417705 Datasheet, PDF (401/739 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Bit
7
6 to 4
3 to 0
Bit Name

Initial Value R/W
0
R


R/W


R/W
Description
Reserved
This bit is always read as 0. The write value
should always be 0.
10-unit of the second counter in the BCD-code.
The range that can be set is 0 to 5 (decimal).
1-unit of the second counter in the BCD-code.
The range that can be set is 0 to 9 (decimal).
15.3.3 Minute Counter (RMINCNT)
The minute counter (RMINCNT) is an 8-bit readable/writable register used for setting/counting in
the BCD-coded minute section. The count operation is performed by a carry for each minute of the
second counter.
The range of minute that can be set is 00 to 59 (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.
RMINCNT is not initialized by a power-on reset or manual reset, or in standby mode.
Bit
7
6 to 4
3 to 0
Bit Name

Initial Value R/W
0
R


R/W


R/W
Description
Reserved
This bit is always read as 0. The write value
should always be 0.
10-unit of the minute counter in the BCD-code.
The range that can be set is 0 to 5 (decimal).
1-unit of the minute counter in the BCD-code.
The range that can be set is 0 to 9 (decimal).
15.3.4 Hour Counter (RHRCNT)
The hour counter (RHRCNT) is an 8-bit readable/writable register used for setting/counting in the
BCD-coded hour section. The count operation is performed by a carry for each 1 hour of the
minute counter.
The range of hour that can be set is 00 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 not initialized by a power-on reset or manual reset, or in standby mode.
Rev. 2.00, 09/03, page 355 of 690