CD1400_CCR_RCVEN
| (ISSET(t->c_cflag, CREAD) ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS);
if (cy->cy_channel_control & CD1400_CCR_RCVEN)
opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN | CD1400_CCR_RCVEN;
cd1400_write_ccr(cd, CD1400_CCR_CMDCHANCTL | CD1400_CCR_RCVEN);