3-WIRE REAL-TIME CLOCK
S-35190A
Rev.2.4_00
Flowchart of Initialization at Power-on and Example of Real-time Data Set-up
Figure 41 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 0.5 s
Read status register 1
NO
POC = 1
YES
Initialization after power-on
Initialize
(status register 1 B7 = 1)
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
Example of real-time data setting
OK
Set real-time data 1
Read real-time data 1
Read status register 2
NO
TEST = 0
YES
END
Figure 41 Example of Initialization Flowchart
34
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
