HD64F3687GHV Datasheet, PDF (206/566 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 10 Realtime Clock (RTC)
10.3.4 Day-of-Week Data Register (RWKDR)
RWKDR counts the BCD-coded day-of-week value on the carry generated once per day by
RHRDR. The setting range is decimal 0 to 6 using bits WK2 to WK0.
Initial
Bit
Bit Name Value
7
BSY
—
6 to 3 —
All 0
2
WK2
—
1
WK1
—
0
WK0
—
R/W Description
R
RTC Busy
This bit is set to 1 when the RTC is updating (operating)
the values of second, minute, hour, and day-of-week
data registers. When this bit is 0, the values of second,
minute, hour, and day-of-week data registers must be
adopted.
—
Reserved
These bits are always read as 0.
R/W Day-of-Week Counting
R/W Day-of-week is indicated with a binary code
R/W 000: Sunday
001: Monday
010: Tuesday
011: Wednesday
100: Thursday
101: Friday
110: Saturday
111: Reserved (setting prohibited)
Rev. 3.00 Sep. 10, 2007 Page 172 of 528
REJ09B0216-0300