DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 408

• 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

11.3.5
RTCCR1 controls start/stop and reset of the clock timer. Bits 7 to 5 of this register are initialized
to H'00 by a STBY input or the RST bit in RTCCR1, but not initialized by a RES input. For the
definition of time expression, see figure 11.2.
Bit
7
6
5
4
3 to
0
Note: * Initial value after RES.
Rev.7.00 Dec. 24, 2008 Page 354 of 698
REJ09B0074-0700
Bit Name
RUN
12/24
RST
—
PM
RTC Control Register 1 (RTCCR1)
24-hour count 0
12-hour count 0
24-hour count
12-hour count
Initial Value* R/W
—
—
—
0
All 0
PM
PM
Figure 11.2 Definition of Time Expression
18 19 20 21 22 23 0
6
R/W
R/W
R/W
R/W
—
1 (Afternoon)
1
1
7
2
2
8
3
3
9 10 11 0
Description
RTC Operation Start
0: Stops RTC and free running counter operation
1: Starts RTC and free running counter operation
Operating Mode
0: RTC operates in 12-hour mode. RHRDR counts on 0
1: RTC operates in 24-hour mode. RHRDR counts on 0
A.M./P.M.
0: Indicates a.m. when RTC is in the 12-hour mode.
1: Indicates p.m. when RTC is in the 12-hour mode.
Reset
0: Normal operation
1: Resets registers and control circuits except RTCCSR
and this bit. Clear this bit to 0 after having been set to 1.
Reserved
These bits are always read as 0.
4
4
0 (Morning)
to 11.
to 23.
5
5
6
6
0
7
7
8
8
9 10 11 12 13 14 15 16 17
9 10 11 0
Noon
1
1 (Afternoon)
2
3
4
5