S-35399A03-J8T2G Seiko Instruments, S-35399A03-J8T2G Datasheet - Page 17

• 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

Rev.2.0
7. Up counter
The up counter is a 24-bit Read-only register. It starts binary counting from “000000h” from power-on and continues
counting as long as power is being applied. It continues counting when initialization, instead of returning to “000000h”. At
power-on, registers are cleared by the power-on detection circuit so that the up counter is cleared to “000000h”. If the
power-on detection circuit does not operate successfully, the counter may start from the indefinite status. For successful
operation of the power-on detection circuit, refer to “
the operation timing of the up counter, refer to “ Up-Count Operation” .
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Table 12 Example of Count Value and Read Data in Register
C64k
C256
B7
B7
C1
B7
Count Value
EFFFFFh
FFFFFFh
000001h
000002h
C128k
C512
•
•
•
•
•
•
C2
C256k
C1k
Seiko Instruments Inc.
Figure 18 Up Counter
C4
C512k
C2k
C8
Power-on Detection Circuit and Register Status” . Regarding
C1M
C4k
C16
Read data in register
C2M
C32
C8k
F7FFFFh
FFFFFFh
000080h
000040h
C16k
C4M
C64
•
•
•
•
•
•
2-WIRE REAL-TIME CLOCK
C128
C32k
C8M
B0
B0
B0
S-35399A03
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