No problem on 2nd but malfunction on 3rd Rev chip

[Motti Ng]

We have been using SDKv11.0.0 with S130 softdevice on nRF51822-QFAA rev 2 on a custom board with no problems at all.

Since our nRF51822 BLE module vendor no longer support rev 2 chip, we need to change to rev 3.

It is found that new BLE module is NOT functioning properly.

The P0.11 pin (used as SPIM MOSI) is irregularly toggling by itself even if there is no SPI CLK.

Some of them are NOT even advertising.

With the same code on the rev 2 one, P0.11 pin is just pull high since there is no active SPI.

According to the compatibility matrix, rev 3 chip should support SDKv11.0.0 + S130.

Is there anything I am missing to migrate from rev 2 chip to rev 3 chip?

Do I need to modify the firmware to be run on rev 3 chip?

Thanks.

[Kenneth]

Hi,

I am a little unsure how to best help you on this case.

We could re-test the chips in specific if you like, just to confirm they are not damaged in some way. I assume we can also be helpful in physically swapping the nRF51822 chips between the two modules if you send them to us.

It would be interesting to know if you have tried your software on an nRF51-DK (with rev3) and if you can observe the same, that might give some indication if it's module, chip damage or revision in specific. Is there any code we can run on a nRF51-DK to replicate the issue?

Let me know your thoughts.

Best regards,
Kenneth