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S-35399A02 Datasheet, PDF (10/55 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK | |||
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2-WIRE REAL-TIME CLOCK
S-35399A02
Rev.1.0_00
 Configuration of Data Communication
1. Configuration of data Communication
For data communication, the master device in the system generates a start condition for the S-35399A02. Next, the
master device transmits 4-bit device code â0110â or â0111â, and 3-bit command and 1-bit Read/Write command to the
SDA bus. After that, output or input is performed from B7 of data. If data I/O has been completed, finish communication
by inputting a stop condition to the S-35399A02. The master device generates an acknowledgment signal for every
1-byte. Regarding details, refer to â Serial Interfaceâ. Device code â0110â is compatible with the SII S-35390A/392A as
software. Regarding details, refer to â2. Configuration of commandâ.
Start condition
Device code
Command
Read/Write bit
Acknowledgment bit
STA 0
1
1 0 / 1 C2 C1 C0 R / W ACK
1-byte data
Stop condition
B7 B6 B5 B4 B3 B2 B1 B0 ACK STP
Figure 11 Data Communication
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Seiko Instruments Inc.
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