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L9678P Datasheet(PDF) 34 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) 34 Page - STMicroelectronics

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Start-up power control
L9678P, L9678P-S
34/203
DocID029274 Rev 3
Figure 17. VSF control logic
4.4
Reset functions
The device provides reset logic to safely control system operation in the event of internal
ECU failures. Several internal reset signals are generated depending on the type of failure
detected. In the following figure, the voltage monitoring diagram is shown. BG_ERR reports
error on the bandgap reference voltage, VREG_ERR reports errors on any of the internal
regulators (VINT3V3 for 3.3 V analog circuitry, CVDD for 3.3 V digital circuitry),
VDD3V3_ERR and VDD5_ERR report errors on VDD3V3 and VDD5 regulators,
respectively.
Figure 18. Internal voltage errors



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