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nrf52810 : External pull-down on SWDIO PIN

opasutto

Hi, we are currently trying to reduce the power consumption on our product that uses an nrf52810.

An 1k pull-down resistor has been used on the SWDIO pin, but I don't really know why, as it seems that it induces an unnecessary current (there is a 3V voltage present on this pin), and from the documentation, an internal resistor is already present.

Here is the BLE part of ou schematic:

Can you please confirm (or not) the possibility to remove this resistor.

Thank you,

Olivier

  • +1

    Hello, 

    In these applications we have done, SWDIO and SWDCLK are directly connected, and the 52810 official manual reference design does not mention the need for pull-down resistors. It is recommended to follow the circuit design in the official manual.

    Help it helps

    BR./Zara Wu (RF-star technology)

  • 0 in reply to Zara Wu

    Hi Zara Wu, thank you for your reply!

  • +1

    Hi,

    We would always recommend (as   mentioned) , to follow our reference design which is as follows:

    You can also visit our infocenter  for further details.

    Best Regards,

    Priyanka

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