nRF52840 JTAG fully disable after firmware flashing

[Siddharth Kachhia]

`Hi There,

For nRF52840 board, If I want to fully disable JTAG or SWD lines after flashing, then what are the options to achieve it.

Questions:

1) If I want to disable nRF52840 JTAG or SWD lines from software, then how to handle it ?

2) If I want to disable nRF52840 JTAG or SWD lines from hardware, then how to achieve it ?

[Jared]

Hi,

The easiest method would be to set the board into nRF Only mode by using Switch 6.

regards

Jared 

[Siddharth Kachhia]

But If Switch 6 is set to 'nRF only' then P18 - 'Debug In' port is also there to debug(JTAG) for flashing nRF52840 ?

[Jared]

Hi,

See this.

regards

Jared