S-35390A-J8T1G Seiko Instruments, S-35390A-J8T1G Datasheet - Page 8

• Manufacturer Part Number: S-35390A-J8T1G
• Description: IC RTC I2C 2-WIRE 8-SOP
• Manufacturer: Seiko Instruments
• Type: Clock/Calendarr

Specifications of S-35390A-J8T1G

• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: 728-1006-2

8
2-WIRE REAL-TIME CLOCK
S-35390A
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-35390A. 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-35390A. 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
B4
1-byte data
Figure 10 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.3.0
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