s-35399a02 Seiko Instruments Inc., s-35399a02 Datasheet - Page 10
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s-35399a02
Manufacturer Part Number
s-35399a02
Description
2-wire Real-time Clock
Manufacturer
Seiko Instruments Inc.
Datasheet
1.S-35399A02.pdf
(55 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
s-35399a02-HRT1
Manufacturer:
SEIKO
Quantity:
20 000
10
2-WIRE REAL-TIME CLOCK
S-35399A02
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 “0110” or “0111”, 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 “ Serial Interface ”. Device code “0110” is compatible with the SII S-35390A/392A as
software. Regarding details, refer to “ 2. Configuration of command ”.
Start condition
STA
B7
0
B6
Device code
1
B5
1
1-byte data
B4
0 / 1
Figure 11 Data Communication
B3
Seiko Instruments Inc.
C2
B2
Command
C1
B1
C0
B0
Read/Write bit
R / W
ACK
Acknowledgment bit
ACK
Stop condition
STP
Rev.1.0
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