Error while flashing custom board with nrf9160 SiP using nrf5340DK

[nano2]

Hello,

I am trying to flash the Serial LTE modem on the nrf9160 on a custom board using the nrf5340DK and the nrf Connect Programmer. I am using the P20 port on the DK and have made the connections as shown here:

I am powering the custom board from an external source at 3.3V. The VDD_nRF´ is not connected to the custom board.

However I am getting the following error:

Recovering Application core

Failed to recovering application core core. Error: [object Object], message: Batch task recover failed, [jlink] JLINKARM_DLL_ERROR

Error: Failed with exit code 1. One or more batch tasks failed: - [jlink] JLINKARM_DLL_ERROR, code: Nrfjlink. Message: Batch task recover failed, [jlink] JLINKARM_DLL_ERROR.

Any idea on what could be the problem?

[Håkon Alseth]

Hi,

 

The nRF5340-DK will assume 3.0V VDD_IO voltage. if your custom board is running on 1.8V VDD_IO voltage, then you need to connect this to the "VIO_REF" (pin 12) on P20:

https://docs.nordicsemi.com/bundle/ug_nrf5340_dk/page/UG/dk/ext_programming_support_P20.html

 

Kind regards,

Håkon

[nano2]

Hi,

The custom board is running on 3.3 VDD. I tried connecting it to VIO_REF. I got the same error.

[Håkon Alseth]

VTG must be connected to 3V in order to make the debugger switch to this debug-out port (P20 in this case).

Can you try to use nrfjprog --recover -f nrf91 --log and share the .log file here?

 

-Håkon

[nano2]

VTG is connected to 3V.

Here is the log file

https://drive.google.com/file/d/12srv67XdF90W08cF6tMuQAkRlUetc_Du/view?usp=sharing

Thank you

[Håkon Alseth]

Thanks. The log unfortunately does not give any details other than -1, which is the same as if there's nothing connected.

Can you share a picture of your setup? With wires etc going from the DK -> custom board?

 

Kind regards,

Håkon

[nano2]

Unfortunately I cannot provide pictures of the setup. We'll investigate the custom board hardware and try some alternative programming options. I will come back with the results.

Thank you.