With the rapid development of computer technology,its field is more and more wide.Using of USB device is more general than before.USB bus interface can connect the USB device and the host.This interface is fast and flexible.But we always use computer to get the data from the USB.So we hope we can get data from USB through single chip microcomputer.
A general purpose interface chip CH375 for USB is introduced in this paper.based on which a new method of using external single chip microcomputer connect with the flash disk is given.Only add one CH375 chip to the single chip microcompurer’s hardware system.The operator can use the program given by the CH375 to read the data from the frash disk and realize the communication between the sigle chip microcomputer and the flash disk.This method is very simple and can be operated easily.