Write verify fails on custom nRF52810 board

[towes]

I've put the recommended circuit for the nRF52810 QCAA chip together on breadboard (schematic is below) and am using a J-Link Edu Mini to program.

I created a custom board template in nRF Connect with nrf52810 QFAA (no QCAA option) and used it to build both Hello World and Blinky examples. When I try to flash either example I receive a "ERROR: Write verify failed." message which expands to:

[error]: [ nRF52] - Data does not match in address range [0x00000000-0x00007a30] (Flash)

[error]: [ nRF52] - Expected byte value 0xfe but read 0x00 at address 0x000029f0.

[error]: [ nRF52] - Flash verification failed.

[error]: [ nRF52] - Failed while verifying file c:\ncs\Applications\hello_world\build_1\zephyr\zephyr.hex.

with the log command.

I've also used an nRF52 devkit build (with the NRF52810 version selected) and received a similar message with different values:

[error]: [ nRF52] - Data does not match in address range [0x00000000-0x00008b40] (Flash)

[error]: [ nRF52] - Expected byte value 0xf0 but read 0x00 at address 0x000011e1.

[error]: [ nRF52] - Flash verification failed.

[error]: [ nRF52] - Failed while verifying file c:\ncs\Applications\hello_world\build\zephyr\zephyr.hex.

I was able to flash this build to the actual dev board hardware fine.

I've attached the log file from this devkit build.

Any help would be appreciated

Thanks

1200.log.log

[ovrebekk]

Hi

What is the supply voltage of your board? 

The J-Link Edu Mini does not have level shifters on board, and as such will only be able to program boards with a supply voltage of around 3.3V. 

If your board is using a different supply voltage you would need to use something like the J-Link Base, which supports the entire voltage range of the nRF52 devices. 

Best regards
Torbjørn

[towes]

Hi Torbjorn,

Thanks for the reply.

The voltage supply to the board is 3.3V.

Here's a picture of the supply itself.

[Vidar Berg]

Hi,

It looks like you are missing one of the DCDC inductor in your design:

Please add CONFIG_BOARD_ENABLE_DCDC=n to your prj.conf to use the internal LDO instead, and see if it helps. Both inductors are needed for noise suppression. 

[towes]

I've added that line to my prj.conf file but still receive the same type of error.

[ovrebekk]

Hi 

Does it help if you run a recover operation first? 

You can do this from the command line like this:

nrfjprog --recover

Also, can you share a picture of your PCB as well? 

Have you probed any pins on the nRF52810 to see if the chip is powered up properly? 

The VDD pins should follow the supply voltage, and you can also check the DEC1 and DEC2 pins to see if the chip is powered up. The DEC1 voltage should be around 0.9V, and the DEC2 voltage should be around 1.3V. 

Best regards
Torbjørn

[towes]

Hi,

I tried adding the command you suggested and got the same result.

The board is messy unfortunately but here's an image:

The VDD pins all show roughly 3.3V, DEC1 shows 1.1V and DEC2 shows 1.3V.

I've double checked the capacitor on DEC1 and it is definitely 100nF so I'm not sure why it is at 1.1V.

Thanks