S35390A datasheet(9/51 Pages) SII

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S35390A датащи(PDF) 9 Page - Seiko Instruments Inc

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FOR AUTOMOTIVE 105°C OPERATION 2-WIRE REAL-TIME CLOCK

Rev.2.2_00

S-35390A H Series

Seiko Instruments Inc.



Configuration of Data Communication

1. Data communication

For data communication, the master device in the system generates a start condition for the S-35390A H Series. Next,

the master device transmits 4-bit device code "0110", 3-bit command and 1-bit read / write command to the SDA line.

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-35390A H Series. The master device generates an acknowledgment signal for every

1-byte. Regarding details, refer to " Serial Interface".

Command

R / W

Device code

ACK

Read / write bit

Acknowledgment bit

ACK

Start condition

Stop condition

1-byte data

STA

STP

Figure 9 Data Communication

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