Identifying nRF52832 chip revision from FICR register

[amrbekhit]

Hello,

I've got an nRF52832 embedded in a module (Telit RE866). As such, I can't see the markings on the chip and have to resort to reading the FICR registers to identify the hardware revision. Here are the results:

INFO.PART = 0x52832
INFO.VARIANT = 0x41414230
INFO.PACKAGE = 0x2000

I understand that this is an nRF52832 in a QFxx package, variant AAB0. However, I'm trying to use this information to identify which errata is applicable by looking at the compatibility matrix. However, there is no obvious correlation between the information in the register and the matrix. What is the xx value in QFxx? How do I interpret the build code?

[Kenneth]

Hi,

Unfortunately there is no place you can find this directly, however if you open the system_nrf52.c you can reverse engineer how to identify the hardware revision by comparing to the individual Errata document for the various issue and variants.

Best regards,
Kenneth

[amrbekhit]

Thanks for the suggestion - not a bad idea. I ended up stepping through the execution of SystemInit on the device and found that errata 31, 36, 66, and 108 were executed. Looking at the various errata documents, this would mean the device is probably either Engineering C, Revision 1 or Revision 2.