DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 412
DF2211NP24V
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
Datasheet
1.DF2211NP24V.pdf
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11.4
11.4.1
The RTC registers that store second, minute, hour, day-of week, operating mode, and A.M./P.M.
data are not reset by an STBY input. Therefore, all registers must be set to their initial values after
power-on and STBY input. Figure 11.3 shows the initial setting and resetting procedures of the
RTC. Once the register setting are made, the RTC provides an accurate time as long as power is
supplied regardless of a RES input.
Rev.7.00 Dec. 24, 2008 Page 358 of 698
REJ09B0074-0700
Operation
Initial Settings of Registers after Power-On and Resetting Procedure
Set RSECDR, RMINDR,
RHRDR, RWKDR,
12/24 in RTCCR1, and PM
RUN in RTCCR1=1
RST in RTCCR1=1
RST in RTCCR1=0
Figure 11.3 Initial Setting Procedure
Clock count controller is reset.
Second, minute, hour, day-of-week,
operating mode, and a.m/p.m are set.
RTC operation is started.
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