debbuging custom board 1.8V powered with nrf52840 DK

RE: debbuging custom board 1.8V powered with nrf52840 DK

Jared — Tue, 08 Jun 2021 12:08:25 GMT

Hi,

We don't generally give out recommendations on third-party products., but I've seen customers use this SEGGER J-link before.

I would consider contacting either SEGGER or your distributor and ask them.

regards

Jared

RE: debbuging custom board 1.8V powered with nrf52840 DK

julienh — Tue, 08 Jun 2021 09:01:21 GMT

Hi Jared,
Do you have any reference to recommend ? I saw jLINK base but it's 400$ so if I can find a cheaper solution, would be great.

PS : I saw this on other topics http://embeddedsoftdev.blogspot.com/p/ehal-nrf51.html but I can't find if we are able to use J-link RTT Viewer or if there is any equivalent to debug with RTT ?

Thank you

RE: debbuging custom board 1.8V powered with nrf52840 DK

Jared — Tue, 08 Jun 2021 08:50:57 GMT

Hi,

[quote user=""]Is that possible to debug a 1.8V external NRF52840 when NRF52840 DK is powered by USB [/quote]

No, you need to make sure that the voltage on the DK and the custom board is the same. This means that if you're using USB then the external board should be supplied with 3V. 1.8V debugging is not supported by the DK. You should use a stand-alone J-link debugger instead

regards

Jared