SMB_1BYTE_ADDR
ret = time_readrtc(sa->sa_interface, sa->sa_device, SMB_1BYTE_ADDR, M41T81_SEC);
sc->sc_type = SMB_1BYTE_ADDR; /* One-byte register addresses on the ST */
ret = time_readrtc(sa->sa_interface, sa->sa_device, SMB_1BYTE_ADDR, M41T81_SEC);
sc->sc_type = SMB_1BYTE_ADDR; /* One-byte register addresses on the ST */