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Compatibility Matrix for nRF51822

jreid2704

We have been manufacturing for a while with the nRF51822, Revision 2, and WLCSP package and build code D0 (D0 is what Nordic recommended me to spec to contract manufacturers in China. Honestly have never really understood exactly how Dx0 translates to D0). At our board level testing we check the chip revision to make sure everything is OK and for many thousand units it has been reporting 004D which matches the compatibility matrix.

This morning the chips started reporting 006A and I cannot find this in the compatibility matrix. Could someone help me decipher what this is? Could someone also help me know all valid chip revisions so I dont have any more line down situations?

Thanks in advance for the help!

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    Hi

    I agree with you, the information in the compatibility matrix is not complete and insufficient. We intend to change that in an upcoming version of the compatibility matrix. To check the chip revision, you should instead use the methods described in my answer on this thread.

    Some explaining of the given information in the nRF51 compatibility matrix:

    • The build code of the nRF51 second revision CEAA variant production version is Dx0, where x is a number from 0 to 9.
    • The chip marking on the chip however has only the first two digits in the build code. The last digit of the build code is not visible on the chip markings. For example, a chip with marking N51822 CEAAD0 actually has build code D00. A chip with chip marking N51822 CEAAD1 has build code D10.
    • The number x in the build code stands for the source the chip originates from, i.e. what production site it comes from. Nordic has at this point multiple production sites so the number is not always the same, even though the nRF51 chip is identical.
    • the HWIDs given in table 1 and 2 in the compatibility matrix are only valid for one production site, i.e. the one with number 0. If a chip comes from production site number 2, it will produce a chip with build code D20, and the chip markings will be N51822 CEAAD2, and the HWID will be different
    • The HWID given in the nRF51 compatibility matrix is just for production site number 0. The nRF51 compatibility matrix does not list HWIDs for production sites 1 to 9.
Reply
  • 0

    Hi

    I agree with you, the information in the compatibility matrix is not complete and insufficient. We intend to change that in an upcoming version of the compatibility matrix. To check the chip revision, you should instead use the methods described in my answer on this thread.

    Some explaining of the given information in the nRF51 compatibility matrix:

    • The build code of the nRF51 second revision CEAA variant production version is Dx0, where x is a number from 0 to 9.
    • The chip marking on the chip however has only the first two digits in the build code. The last digit of the build code is not visible on the chip markings. For example, a chip with marking N51822 CEAAD0 actually has build code D00. A chip with chip marking N51822 CEAAD1 has build code D10.
    • The number x in the build code stands for the source the chip originates from, i.e. what production site it comes from. Nordic has at this point multiple production sites so the number is not always the same, even though the nRF51 chip is identical.
    • the HWIDs given in table 1 and 2 in the compatibility matrix are only valid for one production site, i.e. the one with number 0. If a chip comes from production site number 2, it will produce a chip with build code D20, and the chip markings will be N51822 CEAAD2, and the HWID will be different
    • The HWID given in the nRF51 compatibility matrix is just for production site number 0. The nRF51 compatibility matrix does not list HWIDs for production sites 1 to 9.
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