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LC709203FQH-03TWG Fiches technique(PDF) 9 Page - ON Semiconductor

No de pièce LC709203FQH-03TWG
Description  Smart LiB Gauge Battery Fuel Gauge LSI
Download  23 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LC709203FQH-03TWG Fiches technique(HTML) 9 Page - ON Semiconductor

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9
Wake up from Sleep mode
(Not to scale)
(Not to scale)
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 I
2C 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.
Enable I
2C communication
SCL
TWR2
SDA
STOP condition
Disable I
2C communication
Sleep mode
TSP
Enable I
2C
communication
SDA
TWU
TWR1
Disable I
2C
communication
Disable I
2C communication
Sleep mode


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