S-35399A03-J8T2G Seiko Instruments, S-35399A03-J8T2G Datasheet - Page 40

• Manufacturer Part Number: S-35399A03-J8T2G
• Description: Real Time Clock 2-wire Real Time Clock
• Manufacturer: Seiko Instruments

Specifications of S-35399A03-J8T2G

• Supply Voltage (max): 3 V
• Supply Voltage (min): 1.3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Supply Current: 0.34 uA
• Package / Case: SOP-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

40
2-WIRE REAL-TIME CLOCK
S-35399A03
Flowchart of Initialization at Power-on and Example of Real-time Data Set-up
Figure 50 shows the flowchart of initialization at power-on and an example of real-time data set-up. Regarding how to apply
power, refer to “
flowchart of real-time data strictly. And if using the default data at initializing, it is also unnecessary to set up again.
Power-on Detection Circuit and Register Status” . It is unnecessary for users to comply with this
NG
NO
NO
display to status register 1
(status register 1 B7 = 1)
Read status register 1
Read status register 1
Read status register 1
Confirm data in status
Read real-time data 1
Read status register 2
Set 24-hour/12-hour
Set real-time data 1
Figure 50 Example of Initialization Flowchart
Wait for 0.5 s
Power-on
TEST = 0
register 1
POC = 1
POC = 0
Initialize
BLD = 0
START
END
YES
OK
YES
YES
YES
Seiko Instruments Inc.
NO
NO
Initialization after power-on
Example of real-time data setting
Rev.2.0
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