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ggob
Visitor II
November 10, 2025
Solved

ASM330LHH: About AN5296 Application note power-up requirement

  • November 10, 2025
  • 1 reply
  • 160 views

AN5296
Application note
ASM330LHH: automotive inertial module digital 3-axis accelerometer and digital 3-axis gyroscope

3 Operating modes
”To guarantee proper power-off of the device, it is recommended to maintain the duration of the VDD line to GND for at least 100μs."

About the statement:
If the power is turned on before reaching the GND level, what will be the effect?

    This topic has been closed for replies.
    Best answer by Federica Bossi

    Hi @ggob ,

     

    If the power is turned on before the VDD line has been held at GND for at least 100 μs, the device may not reset properly. This can lead to undefined internal states, malfunctioning, incorrect sensor readings, or unstable operation. Ensuring the 100 μs low period guarantees a proper power-off sequence and reliable device startup.

     

    1 reply

    F
    Federica BossiAnswer
    Technical Moderator
    November 12, 2025

    Hi @ggob ,

     

    If the power is turned on before the VDD line has been held at GND for at least 100 μs, the device may not reset properly. This can lead to undefined internal states, malfunctioning, incorrect sensor readings, or unstable operation. Ensuring the 100 μs low period guarantees a proper power-off sequence and reliable device startup.

     
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