address wire

In the circuit aspect , it record into with document the semaphore of the machine collect to use the data wire totally and address wire , avoid the data and the clash of address is to design a little bit difficult .

电路方面，文档录入机的控制电路和USB接口电路是整个系统设计的重点，而USB与文档录入机的信号采集共用数据线和地址线，因此数据和地址总线仲裁是设计的难点。