STM32WL33 - Running MRSUBG using LSI instead of LSE

[Lambda]

On the WL33 range of boards is it possible to utilise the MRSUBG without turning on the LSE within the RCC section and instead have the MRSUBG utilise the LSI?

I have found that if you leave the LSE enabled in RCC but set the clock configuration to use the LSI the program still functions but I wonder if it's still utilising the LSE under the hood.

[STTwo-32 · Accepted solution]

Hello @Lambda 

You can use the MRSUBG without any need to enable the LSE. The HSE is the only mandatory to use the MRSUBG radio since the accuracy is needed). So, the LSE is not an obligation, and you can use LSI. This STM32CubeMX wrong behavior is reported internally for correction on the Future (under internal ticket number 201372).

Best Regards.

STTwo-32