SBT_LSB
counter1 = (uint64_t)RD4(sc, SNVS_LPSRTCMR) << (SBT_LSB + 32);
counter1 |= (uint64_t)RD4(sc, SNVS_LPSRTCLR) << (SBT_LSB);
counter2 = (uint64_t)RD4(sc, SNVS_LPSRTCMR) << (SBT_LSB + 32);
counter2 |= (uint64_t)RD4(sc, SNVS_LPSRTCLR) << (SBT_LSB);
sbt += 2 << SBT_LSB;
WR4(sc, SNVS_LPSRTCMR, (uint32_t)(sbt >> (SBT_LSB + 32)));
WR4(sc, SNVS_LPSRTCLR, (uint32_t)(sbt >> (SBT_LSB)));