S-35392A Datasheet, PDF (8/47 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

2-WIRE REAL-TIME CLOCK
S-35392A
Rev.1.3_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-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
Device code
Command
Read/Write bit
Acknowledgment bit
STA 0
1
1
0
C2 C1 C0 R / W ACK
1-byte data
Stop condition
B7 B6 B5 B4 B3 B2 B1 B0 ACK STP
Figure 8 Data Communication
8
Seiko Instruments Inc.