In this paper, a realization method of data storing and transferring for parallel interface to serial interface by using Single chip processor AT89C51 is introduced.

The FPGA-based implementation of data input module and data output module of VLBI standard interface is expatiated in this dissertation.

Taking the design of the industry on-line state detection Data Acquisition System as example, the paper discusses the main processes on the software and hardware design based on DSP and USB.