is nRF51822 die revision identified in register

[Jeff]

Some nRF51 modules are sold with metal covers preventing visual access to the chip and date code. Is it possible to identify the revision of a nRF51822 through the Cortex-M0 SCB->CPUID register or other means?

[Hung Bui]

Hi Jeff, You should read the HWID in the CONFIGID in FICR on the chip as described in Chapter 7 in the nRF51 Reference Manual.

Then you can match your chip HWID with the chip revision as in compatibility matrix table here.

[RK]

There was a post a while ago pointing out there's a file in the windows version of the SDK called nrf51deviceids.xml. That has every build code with full information for the chip. it has softdevice info too and is really rather useful.