s-35392a Seiko Instruments Inc., s-35392a Datasheet - Page 8

• Manufacturer Part Number: s-35392a
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

8
2-WIRE REAL-TIME CLOCK
S-35392A
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-35392A. Next, the master
device transmits 4-bit device code “0110”, 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-35392A. The master device generates an acknowledgment signal for every 1-byte. Regarding details,
refer to “ Serial Interface”.
Start condition
STA
B7
0
B6
Device code
1
B5
1
1-byte data
B4
Figure 8 Data Communication
0
B3
Seiko Instruments Inc.
C2
B2
Command
C1
B1
C0
B0
Read/Write bit
R / W
ACK
Acknowledgment bit
ACK
Stop condition
STP
Rev.1.3
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