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What risks can be when using SDK 5.2.0 + S110 6.0.0 on older nRF51822 QFAACA/C0 chips?

Martin

Hi, it happened that we have some hardware boards populated with older chips rev. QFAACA and some with newer rev. QFAAG0 but we need to share same software. As I read newer chips should use SDK 5.2.0 and older 4.4.2. But SDK functions are not compatible and firmware cannot be simply compiled with both SDKs. What risks can happed when 5.2.0 SDK wil be used with QFAACA chip? Was it just not tested or there is known serious problem?

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    Currently we have about 1000 pieces of QFAACA chips on our new car fleet management units that was made on this winter 2013/14. New batch will probably have QFAAG0 (I don't know if older chips are still supplied) but I need to support both and it would be very helpful to use only newer SDK version. I currently didn't observed any random assert error from softdevice. I read the issue thread but in my case I will not use battery power for old chips. They are fed from 3,3V LDO. Neither I use bondmgr (yet) so there shouldn't be internal flash writes.

  • 0 in reply to Martin

    Unfortunately, the only official recommendation I can give is to use 5.2.1 on first revision chips. If you still choose to use 6.0.0, you'll have to do this entirely on your own risk, and you should make sure to test things thoroughly, also in the corners of the environmental conditions you expect (i.e. temperature, voltage).

    Any future production should end up getting second revision chips, and first revision chips should not be supplied anymore.

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  • 0 in reply to Martin

    Unfortunately, the only official recommendation I can give is to use 5.2.1 on first revision chips. If you still choose to use 6.0.0, you'll have to do this entirely on your own risk, and you should make sure to test things thoroughly, also in the corners of the environmental conditions you expect (i.e. temperature, voltage).

    Any future production should end up getting second revision chips, and first revision chips should not be supplied anymore.

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