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L9678P Datasheet(PDF) 20 Page - STMicroelectronics

Part # L9678P
Description  Automotive user configurable airbag IC
PDF  203 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P Datasheet(HTML) 20 Page - STMicroelectronics

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Start-up power control
L9678P, L9678P-S
20/203
DocID029274 Rev 3
4.2
Power mode control
Start-up and power down of the L9678P are controlled by the WAKEUP pin, VBATMON pin,
VIN pin device status and the SPI interface. There are four main power modes: power-off,
sleep, active and passive mode.
Each power mode is described below and represented in the state flow diagram shown in
Figure 3. The descriptions include references to conditions and sometimes nominal values.
The absolute values for each condition are listed in the electrical specifications section.
Figure 3. Power control state flow diagram



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