Renesas SH7709S Manual De Usuario
Rev. 5.00, 09/03, page 413 of 760
13.2.5
Day of Week Counter (RWKCNT)
The day of week counter (RWKCNT) is an 8-bit readable/writable register used for
setting/counting in the BCD-coded day of week section of the RTC. The count operation is
performed by a carry for each day of the date counter.
setting/counting in the BCD-coded day of week section of the RTC. The count operation is
performed by a carry for each day of the date counter.
The range that can be set is 0
–
6 (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.
RWKCNT is not initialized by a power-on reset or manual reset, or in standby mode.
Bit:
7
6
5
4
3
2
1
0
—
—
—
—
—
Day of week
Initial value:
0
0
0
0
0
—
—
—
R/W:
R
R
R
R
R
R/W
R/W
R/W
Days of the week are coded as shown in table 13.3.
Table 13.3
Day-of-Week Codes (RWKCNT)
Day of Week
Code
Sunday
0
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Saturday
6