ASM330LHH: About AN5296 Application note power-up requirement

ggob · ‎2025-11-09

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?

Federica Bossi · ‎2025-11-12

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.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

View solution in original post

Federica Bossi · ‎2025-11-12

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.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.