Which are the interface options for debugging and programming nRF52840?

[Vikas Bhatt]

Which are the interface options for debugging and programming nRF52840?

[Einar Thorsrud]

The nRF52840 can be programmed and debugged via Serial Wire Debug (SWD). That is the only option.

[Vikas Bhatt]

Can we use UART and USB Type C for debugging and programming nRF52840?

[Einar Thorsrud]

No, you can only use SWD.

[Vikas Bhatt]

Kindly look into this.

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[Vikas Bhatt]

Can we program nRF52840 with BLE throogh OTA, USB, SD Card using the SPI interface and UART?

[Einar Thorsrud]

You can use DFU over many different transports, that is just limited by what is supported by the bootloader and firmware running on the device. But DFU OTA is not the same as programming adn debugging. The devices ship empty, and the initial programming must be done via SWD.