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DFU mode pin button configuration using port P1 pins (NRF52840)

Hello,

I need more details on DFU mode entering topic.  I understand how to configure DFU to enter the bootloading mode on button press event but have dilemma about using the P1 port pins caused by description of NRF_BL_DFU_ENTER_METHOD_BUTTON configuration option:  "32 - 32 (P1.0) (Software Component only)" .

  • Could these pins be used to enter the bootloading mode and what are constraints in their usage?
  • What is the meaning of  note "Software Component only" in pin option description?

For more detailes please refer to DFU mode section of  Bootloader and DFU modules on https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Flib_bootloader_dfu_banks.html, NRF_BL_DFU_ENTER_METHOD_BUTTON option.

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