SNVS_LPCR
WR4(sc, SNVS_LPCR, sc->lpcr);
while ((RD4(sc, SNVS_LPCR) & LPCR_SRTC_ENV) != enbit)
if (!(RD4(sc, SNVS_LPCR) & LPCR_SRTC_ENV)) {