SXIE_RXCR
SXICMS4(sc, SXIE_RXCR, clr_m, set_m);
SXISET4(sc, SXIE_RXCR, SXIE_RXFLUSH);
while (SXIREAD4(sc, SXIE_RXCR) & SXIE_RXFLUSH);