DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 407

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

11.3.4
RWKDR counts the BCD-coded day-of-week value on the carry generated once per day by
RHRDR. This register is initialized to H'00 by a STBY input or the RST bit in RTCCR1, but not
initialized by a RES input. The setting range is decimal 0 to 6 using bits WK2 to WK0.
Bit
7
6 to
3
2
1
0
Note: * Initial value after RES.
Bit Name
BSY
—
WK2
WK1
WK0
Day-of-Week Data Register (RWKDR)
Initial Value* R/W
—
All 0
—
—
—
R
—
R/W
R/W
R/W
Description
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.
Day-of-Week Counting
Day-of-week is indicated with a binary code.
000: Sunday
001: Monday
010: Tuesday
011: Wednesday
100: Thursday
101: Friday
110: Saturday
111: Reserved (Setting prohibited)
Rev.7.00 Dec. 24, 2008 Page 353 of 698
REJ09B0074-0700