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  • Case ID: 289893
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nRF5 SDK is not maintained anymore
More Info: Consider nRF Connect SDK for new designs

Enable Internal Pull-Up for RX lines for UART`

user110654

Hello all,

I am working on nRF52833 platform.

I would like to know whether Internal Pull up can be enabled for UART RX lines (not for UARTE RX lines)

I have read it that Internal Pull Can be configured for UARTE RX lines. I would like to whether same can be done for UART RX lines

Also the MACROs to chose and enable UARTE over UART. I tired to enable that but it doesn't actually serve the purpose

Any feedback on above will be useful

Thanks and Regards

Sarjoon.

  • 0

    Can you please let us know which SDK version and chip version you are using.
    I am unsure on the pull configuration on the RX lines for UART in the given SDK, so after knowing the sdk version, I can try to find that info for you.

  • 0 in reply to user6207

    Hello Susheel,

    nRF Mesh SDK - V5.0.0

    nRF Connect Version - V1.6.0 (Have till v1.9.1 version installed)

    Chip version: PCA10100 1.0.0 2020.39

    Is the provided information fine ?

    If anything is needed. Let me know

    Thanks in Advance,

    Sarjoon.

  • 0 in reply to user110654

    Sorry for the late reply, 

    The logic of pin configuration on any UARTE pin (CTS/RTS/TX/RX) are the same. 

    The pull configuration of the pins can be done using GPIO registers on any of these pins before the UART is enabled in the ON mode. Once UART is enabled, UART peripheral takes control. Once the uart peripheral is disabled and/or in the system off mode, the gpio configuration of these pins are again in effect.

    I have read it that Internal Pull Can be configured for UARTE RX lines. I would like to whether same can be done for UART RX lines

    Cannot see any pull configuration of pins provided by the uarte library. Can you please point me to the thread where you read that the configuration can be done for TX pin?

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