DAC0832 is eight of the D / A converters, it is to achieve the functions of A / D converter. In this paper, DAC0832 chip features, the DAC0832 chip circuit through the analysis, a top-down design and modular design, will DAC0832 interface circuit design is divided into: the external of the module port cases, the frequency count Modules, waveform data module and internal signal connectivity, and other four parts. Because of EDA design tools and VHDL language programming is a digital circuit design and simulation software integration process, such integration is an integrated circuit design of a number of important ways and design ideas. Therefore this paper, VHDL hardware description language for each part of the text description of procedures, the last of its systematic integration in a top-level documents, and through the EDA software tools designed Quartus II verification procedures, and gives this circuit in Quartus II software The function of environment simulation waveform. Through the simulation waveform of that analysis, design of the DAC0832 chip interface circuit to achieve a frequency of 762.9 HZ sawtooth.