AscSetChipSDTR
AscSetChipSDTR(iop_base, 0, tid_no);
AscSetChipSDTR(iop_base, asyn_sdtr, tid_no);
AscSetChipSDTR(iop_base, asyn_sdtr,
AscSetChipSDTR(iop_base, asyn_sdtr, tid_no);
AscSetChipSDTR(iop_base, sdtr_data,
AscSetChipSDTR(iop_base, sdtr_data,
AscSetChipSDTR(iop_base, asyn_sdtr, tid_no);