Mode: Unknown model + Device type is unknown, it may be a new version of product ..... + Error While getting readback protection

[cweifeng]

Hello and to whom it may concern

I am currently using nRF51422_QFN48

with laser marking on the IC body

N51422QFAAF01616CS

i am using nRF desktop connect and try to perform flash programming

I got the message as shown below:

Mode: Unknown model

Device type is unknown, it may be a new version of product .....

Error While getting readback protection

The nRF desktop version i am using is 3.6.0, Jlink cmd is 7.20a( i am using Jlink seggar), can anyone tell me if I still can proceed to perform firmware/flash programming with such error message?

anyway, i still proceed to perform flash programming by clicking the "Erase and Program", there are tons of message appear, the message bar appear “Top_XXX_Init  Done” as the last message, is this message expected(indicate that its successful)? OR can anyone tell what kind of message should i look at if the flash programming is successful?

[Susheel Nuguru]

Is this chip factory programmed with some firmware? seems like readback protection was enabled when you got it. Check if it is read back protected and erase the chip using 

> nrfjprog --recover -f nrf51

[cweifeng]

Hello, 

I had tried the nrfprog --recover, but the problem still persists

I manage to perform the firmware/flash programming by first clicking the "Erase ALL" button inside the nRF desktop connect. And then the "Write" wording become black color(initially the Write Word is grey color after i add all the relevant HEX files for firmware Write)

At the end, i manage to see that a message "Write procedure finished", indicating that the firmware write is successful

This problem is solved.

Before i reach this step. I actually perform all the setup step below

1.https://www.segger.com/downloads/jlink/JLink_Windows.exe ; (Jink 7.20a version, double click that .exe file to execute installation)

2. nRF desktop connect version that i use is 3.6.0 

3. https://developer.nordicsemi.com/.pc-tools/nrfconnect-apps/pc-nrfconnect-programmer-1.4.7.tgz
   Copy paste the file under the %USERPROFILE%\.nrfconnect-apps\local folder(if there are some folder/files 
inside this folder, delete all of them)

4. Start the nRF connect, you should choose the Programmer with (local wording version)

Hope this thread help other ppl, enjoy and good luck