Could not find core in Coresight setup nRF52840 ?

[RixtronixLAB]

Dear Members,

I got :

Could not find core in Coresight setup nRF52840 ? with PCA10059, it was working ok before,

Any solution for it ?

Kind regards,

Rixtronix LAB

[RixtronixLAB]

[RixtronixLAB]

Is the chip failed already ?

[Vidar Berg]

Can you show a picture of the debugger connections you've made to 52840 dongle? Also, please try the Programmer app in nrf connect for desktop or nrfjprog and see if you get a similar error.

[RixtronixLAB]

Hi VIdar,

Thanks for the reply,

Here're some shots of the dongle

Where can I find the *.log file ?

I'm thinking that I need to unsolder the chip, it's not responding anymore,

It did few times, and now it is not,

Any suggestions ?

Kind regards,

Rixtronix LAB

[Vidar Berg]

Hi,

Please measure the voltage on SWDIO when you have set up the dongle for programming.

The log file should be located in c:/users/rixtronixlab/ where you called nrfjprog from.

[RixtronixLAB]

Hi Vidar,

Thanks for the reply,

V SWDIO = 2.2V

How much should it be ?

Kind regards,

Rixtronix LAB

[RixtronixLAB]

I can see LD2 (RED) is on, very dim.

[Vidar Berg]

The correct IO voltage depends on how you are you powering the dongle (see Power supply options) and the REGOUT0 setting if you use high voltage mode.