S-35399A02 Datasheet, PDF (43/55 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.1.0_00
2-WIRE REAL-TIME CLOCK
S-35399A02
„ Flowchart of Initialization at Power-on and Example of Real-time Data Set-up
Figure 57 shows the flowchart of initialization at power-on and an example of real-time data set-up. Regarding how to apply
power, refer to “„ Power-on Detection Circuit and Register Status”. It is unnecessary for users to comply with this
flowchart of real-time data strictly. And if using the default data at initializing, it is also unnecessary to set up again.
START
Power-on
Wait for 1 s
Read status register 1
POC = 1
NO
YES
Initialize
(status register 1 B7 = 1)
Initialization after power-on
Read status register 1
NO
POC = 0
YES
NO
BLD = 0
YES
Set 24-hour/12-hour
display to status register 1
Read status register 1
NG
Confirm data in status
register 1
OK
Set real-time data 1
Example of real-time data setting
Read real-time data 1
Read status register 2
NO
TEST = 0
YES
END
Figure 57 Example of Initialization Flowchart
Seiko Instruments Inc.
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