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waclawek.jan
waclawek.jan
Super User
February 15, 2024
Question

AN2606 pins configuration description

  • February 15, 2024
  • 2 replies
  • 4309 views

waclawekjan_0-1707987902611.png

How are these pins "push pull", if they are Inputs?

JW

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    2 replies

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    Imen.D
    ST Technical Moderator
    February 15, 2024

    Hello @waclawek.jan ,

    Thank you for your feedback.

    The pins should be push-pull, even if they are inputs. This covers on the Bootloader side from possible noise on the pins.

    In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks
    waclawek.jan
    waclawek.janAuthor
    Super User
    February 15, 2024

    Hi @Imen.D 

    The pins should be push-pull, even if they are inputs. This covers on the Bootloader side from possible noise on the pins.

    Sorry, but I don't understand. An input can't be push-pull. Is this requirement on the master device connected to STM32? Then this ought to be said so. (Btw. I think it's the pull-down which is to solve problems with noise; and that's a different thing from "push-pull")

    I mean, the state of pins in bootloader (especially those which start automatically when chip is "empty", e.g. pattern 6) really should be perfectly documented, as unexpected pullups/pulldowns - not to mention pins set hard to output - may destroy a new device. In fact, the RM ought to point out this possibility, directing to AN2606 for the details (which then ought to be in AN2606).

    JW

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