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SV.5
SV.5
Associate
Jun 2, 2021 1:59 PM UTC
Question

USB crystal-less works on STM32L152RCT64

can we achive USB 2.0 on STM32L152RCT64SF without oscillator?

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6 replies

Javier1
Javier1
Principal
Jun 2, 2021 2:20 PM UTC

>"USB crystal-less works on STM32L152RCT64"

Is that a question?

>can we achive USB 2.0 on STM32L152RCT64SF without oscillator?

I tried using usb and canbus with the internal HSI in stm32f1xx stm32f2xx and stm32f0xx im not going to try again.... weird random clokc relate issues everywhere

hit me up in https://www.linkedin.com/in/javiermuñoz/
SV.5
SV.5Author
Associate
Jun 2, 2021 2:23 PM UTC

yes correct will USB crystal-less works on STM32L152RCT64

waclawek.jan
waclawek.jan
Super User
Jun 2, 2021 2:38 PM UTC

No.

JW

SV.5
SV.5Author
Associate
Jun 2, 2021 2:43 PM UTC

which nearest controller can do it?

Peter BENSCH
Peter BENSCH
ST Technical Moderator
Jun 2, 2021 2:59 PM UTC

It depends on your requirements. Just have a look into AN4879.

Regards

/Peter

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Peter BENSCH
Peter BENSCH
ST Technical Moderator
Jun 2, 2021 2:56 PM UTC

No, the STM32L1xx does not support crystal-less USB, as you can e.g. find in AN4879.

Unfortunately there is still a Copy'n'Paste typo in the data sheet of the STM32L152RCT6, according to which it should apparently contain this, which is not correct.

Regards

/Peter

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