In this paper, the theory of the m sequence produced by linear feedback shift registers(LFSR) is studied, by modifying the LFSR circuit structure, a programmable m sequence generator is realized with DSP Builder, a software based on modern DSP techniques. The design is debugged and simulated, and the results indicated that the proposed method with the merit of short development cycle, simple in hardware structure and easy in controlling the period and phase of the m sequence. In many projects, it is also a ...