struct FwVersion{
    unsigned vendorId    : 3;
    unsigned hwCfgId     : 5;
    unsigned productId   : 8;
#ifdef OLD_VER_FMT
    unsigned releaseType : 5;
    unsigned buildNo     : 11;
#else
    unsigned releaseType : 3;
    unsigned buildNo     : 13;
#endif
};
static_assert(sizeof(FwVersion) == 4);