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qwer.asdf
qwer.asdf
Senior
October 20, 2015
Question

STM32F042 USB - what is ''Activate OE''?

  • October 20, 2015
  • 2 replies
  • 940 views
Posted on October 20, 2015 at 13:40

There is an ''Activate OE'' checkbox in STM32CubeMX is USB section of the tree which enables a ''USB_OE'' pin on PA4. I can't find any occurrence of USB_OE either in datasheet or reference manual. Can anybody tell me what is it?

Thanks.

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    2 replies

    waclawek.jan
    waclawek.jan
    Super User
    October 20, 2015
    Posted on October 20, 2015 at 14:03

    > I can't find any occurrence of USB_OE either in datasheet or reference manual.

    Maybe because it's USB_NOE... So much about Cube's consistency with the manuals.

    RM0091, Ch.30.4.1:

    The output enable control signal of the analog transceiver (active low) is provided externally

    on USB_NOE. It can be used to drive some activity LED or to provide information about

    the actual communication direction to some other circuitry.

    JW

    qwer.asdf
    qwer.asdfAuthor
    Senior
    October 20, 2015
    Posted on October 20, 2015 at 14:11

    Thank you, Jan.

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