nRF52833-QDAA-B SoC chipset not detected during testing

[Jhakan]

Hello team,
We are currently working on a project that used nRF52833-QDAA-B as the MCU chipset. We have  followed the circuit configuration 5 for our test case. Our SoC is not getting detected when we have used this configuration. Whereas, when tried the same with nRF52833-QDAA-R/ nRF52833-QDAA-R7( same number of pins, package)  the chipset is being detected and we are able to build & flash the code. Kindly specify why this occurs and how to rectify this.

Also specify is we can work with  nRF52833-QDAA-R and build our entire project. If not what are the complications if used.

[Simonr]

Hi

Can you explain what you mean by "not getting detected" exactly? The QDAA-B chipsets have readback protection enabled by default, so it might be this that's making you not be able to detect the board. Try running an nrfjprog --recover command to recover and recover the board where the readback protection is disabled.

Best regards,

Simon

[Jhakan]

Hi Simon,
We use a JTag device to flash the SoC. When we tried with nRF52833-QDAA we were able to flash properly. But wheras in the case of nRF52833-QDAA-B the Soc was not visible under the connected devices drop down in Visual studio. Hence we weren't able to flash or debug with this chipset 

[Gaurav Kapoor]

Simon is it because of the design variation required for -B , Document AN149 , C8 capacitor thing ?