How to enable HSE STM32U375K (32pin)

[TDJ]

How can I enable HSE on STM32U375K (32pin) in Cube MX?

The option to enable HSE does not seem to be available in CubeMX. However, the option to select the HSE startup time is enabled.

What am I missing?

Does the STM32U375K support HSE? I couldn't find anything in RM0487 that indicates otherwise.

 

 

 

[Chris21]

Looks like there’s no pin for the clock input on the 32-pin package (see Datasheet):

 

[mƎALLEm]

Looks like there’s no pin for the clock input on the 32-pin package

No HSE I/Os for that package and there is no option to activate HSE in CubeMx:

 

[TDJ]

Ach, thank you.

This is a rather unpleasant and unexpected surprise.

The STM32U375K seems to be a nice MCU, but apparently it lacks the external clock input available on almost all of the other 28- and 32-pin packages. Unfortunately, this means we cannot use it for the project it was originally considered for since we need precise ADC clock, unless for ADC we use MSIK with LSE and auto-calibration, but it is not a preferred option.