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LC709203F(2015) View Datasheet(PDF) - ON Semiconductor

Part Name
Description
Manufacturer
LC709203F Datasheet PDF : 0 Pages
LC709203F
Wake up from Sleep mode
Sleep mode
Disable I2C communication
Enable I2C
communication
TSP
Disable I2C
communication
SDA
(Not to scale)
TWU
TWR1
Sleep mode
Enable I2C communication
Disable I2C communication
SCL
TWR2
SDA
(Not to scale)
STOP condition
Figure 6. I2C Wake up Timing Diagram
To wake up from Sleep mode, and to start I2C communication, Host side must set SDA low prior to the I2C communication.
The Fuel Gauge LSI enables I2C communication after the TWU time period which is measured from the falling edge of
SDA, as above timing chart. This “Wake up condition” is invalid for the following two cases.
1) After TWR1 timing following the falling edge of SDA, the Fuel Gauge LSI “Wake up condition” goes into autonomous
disable. Once I2C communication is started, the operation doesn’t go into disable until the TWR2 timing has elapsed
after STOP condition (below case).
2) After TWR2 timing following I2C Bus STOP condition, the Fuel gauge LSI “Wake up condition” goes into
autonomous disable.
If the “Wake up condition” goes into disable, set SDA low to once again wake up from the Sleep mode prior to the I2C
communication. If Operational mode is set, it is possible to start I2C communication without this “Wake up operation”.
Notice for I2C communication shared with another device
When the I2C Bus (on which the Fuel Gauge LSI is connected) is shared with another device the Fuel Gauge LSI must be in
its operation mode before the other Device starts I2C communication.
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