n52832 qfaab0 and n52832 qfaae1 have any difference?

[Mateo D-G]

I develop a pcb based on the n52832 chip, when the reference of the chip is n52832 qfaae1 all works good, but when i use the n52832 qfaab0 chip it's unprogrammable.

i'm using j-flash to erase the chip, nrfgo studio to upload a new bootloader and aduino ide to program the chip.

Thank you for the help :)

[Simonr]

Hi

First off, can you confirm whether the "B" chip is indeed QFAAB0 or if it is a QFABB/QFABE chip. The QFAB series have less RAM and Flash memory which might explain this behavior. If not, and it is indeed a QFAA-B0 chip, that points to it being a revision 1 chip while the QFAA-E0 is revision 2. There are a few differences between the revisions, the main fixes made to revision 2 are the ones listed here. Can you provide the full build code of your unprogrammable chip, so I can check if there are any specifics to be aware of?

I would also like a detailed explanation of how exactly the QFAAB0 chip is unprogrammable. What happens if you try flashing any application onto it?

Best regards,

Simon