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soren
soren
Associate II
February 7, 2016
Question

Parametric search - HSE available or not

  • February 7, 2016
  • 2 replies
  • 609 views
Posted on February 07, 2016 at 21:33

Hi, I have tried in STM32Cube and I have tried the online parametric search. I want to filter the STM32L0xxx parts so I only get those which have external HSE clock connections available. This ought to be possible, have I overlooked something? It is usually one of the first criteria that comes up in a design - is crystal precision and stability needed, or is it not..

Thanks for any input on how to do that.

Regards, Soren
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    2 replies

    Tesla DeLorean
    Tesla DeLorean
    Guru
    February 7, 2016
    Posted on February 07, 2016 at 21:37

    Pretty sure they all provide for one, CAN and USB normally requiring the accuracy afforded by them.

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    soren
    sorenAuthor
    Associate II
    February 9, 2016
    Posted on February 09, 2016 at 12:27

    Hi Clive, thank you

    Many L0 devices don't have a HSE. For example, STM32L052 in the UFQFPN32 package don't have any OSC pins. They do have a 1% or something HSI which is good enough for CAN and USB. However, I need better than that...

    Regards

    Soren

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