s-35399a03 Seiko Instruments Inc., s-35399a03 Datasheet - Page 17

• Manufacturer Part Number: s-35399a03
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.1.0
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 detector so that the up counter is cleared to “000000h”. If the power-on
detector does not operate successfully, the counter may start from the indefinite status. For successful operation of the
power-on detector, refer to “ Power-on Detection Circuit and Register Status” . Regarding 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
C1M
C4k
C16
Read data in register
C2M
C8k
C32
F7FFFFh
FFFFFFh
000080h
000040h
C16k
C4M
C64
•
•
•
•
•
•
2-WIRE REAL-TIME CLOCK
C32k
C128
C8M
B0
B0
B0
S-35399A03
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