PSC_SMBTXRX
WR(adap, PSC_SMBTXRX, addr);
*out = RD(adap, PSC_SMBTXRX);
WR(adap, PSC_SMBTXRX, 0);
WR(adap, PSC_SMBTXRX, PSC_SMBTXRX_STP);
buf[i] = (unsigned char)(RD(adap, PSC_SMBTXRX) & 0xff);
WR(adap, PSC_SMBTXRX, data);
WR(adap, PSC_SMBTXRX, data);