like to inform you that I can solve the following difficult technical problems for you. ★ 超微超深细孔加工：可在金属上加工0.1mm以上的细孔，深度达到3mm. Manufacture capability of ultra-fine and ultra-deep for small bores: can machine holes with dia over 0.1mm, depth 3mm. ★ 五轴连动加工（瑞士米克朗） 5-axis continuum machining(Switzerland MIKRON) ★ 超细电极慢走丝线切割：瑞士阿奇夏米尔线切割，最细电极丝达到0.03mm，可进行超高光洁度（达到0.1μ），超细清角（最小尖角达到0.025mm）线切割加工. Ultra thin slow wire-cutting: Switzerland Agie Charmilles wire-cut, withthe thinnest 0.03mm, also capable of machining ultra-fine finish (0.1μ) and ultra-sharp angle (smallest 0.025mm). ★ 钨钢（硬质合金）成形加工：钨钢成型磨削、外园磨削. Tungsten steel (hard alloy) forming machining: tungsten forming grinding,cylindrical grinding. ★ 超长孔加工:最小孔径0.3mmX50mm(超长),公差在0.002mm. Ultra-long hole machining: smallest hole 0.3mmX50mm(super long), tolerance 0.002mm. ★ 精密外园磨削：超长、超细轴磨削，尺寸精度达到2μ，同轴跳动2μ以内. Precision cylindrical grinding: ultra-long and ultra-thin axis grinding, with precision to 2μ，coaxial jumping within 2μ. ★ 精密内,外螺纹磨削加工. Precision inner and outer thread grinding machining. ★ 精密镜面抛光,超平平面抛光. Precision mirror polishing. Ultra-flat surface polishing.

这样的单片机有，如ST公司的就有，可是这种单片机的USB全部是SLAVE端的，没有HOST端的

ＳＴ的