发布于 2010-02-21 12:35:19
3楼
CP340的通讯手册中有这样的描述:
None:“This setting only makes sense with bus-capable special drivers”
Signal R(A) 0 Volt Signal:this initial state corresponds to idle(no senders active)in"Half Duplex(RS 485)Two-Wire Mode ".Break detection is not possible with this initial state
没能理解者些描述。