MR2_STOP1
scn_config(unit, channel, speed, speed, MR1_PNONE | MR1_CS8, MR2_STOP1);
mr2 |= MR2_STOP1;
MR1_PNONE | MR1_CS8, MR2_STOP1);
qvaux_write2(sc, sc->sc_qr.qr_ch_regs[0].qr_mr, MR2_STOP1);
qvaux_write2(sc, sc->sc_qr.qr_ch_regs[1].qr_mr, MR2_STOP1);
mr2 |= MR2_STOP1;