Internal Pull-up Resistor value

Hello,

I want to avoid external pull-up resistor on all my input pins because size of board.

I'm using RA6M4. I cannnot find the value of internal pull-up or pull-down of any pin in the datsheet of the MCU.

Can you tell me these values or where can I find them?

Thanks.

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  • Hi David,

    Basically, the default setting of pins is no pull-up or pull-down, but if you want to re-confirm, there are some ways:

    1, Check the pin setting in FSP

    2, Check them in pin_data.c

    3, During run time, you can use R_IOPORT_PinCfg to read the pin cfg, it will contain pin configutation.

    But if you are using FSP, what you need to do is just to check the pin setting in FSP before developing. It's easy and quick.

    Hope it helps,

    NP_Renesas

  • Hello,

    Thanks for the info, but this is not my question. My question is about the value of resistor of pull-up or pull-down.
    For example, in USB pins there is a pull-up and pull-down resitors:

    But for any other pin of the MCU, i have no clue of the value of these resistors.

    Thanks.

Reply
  • Hello,

    Thanks for the info, but this is not my question. My question is about the value of resistor of pull-up or pull-down.
    For example, in USB pins there is a pull-up and pull-down resitors:

    But for any other pin of the MCU, i have no clue of the value of these resistors.

    Thanks.

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