基于FPGA的接口芯片逻辑设计及仿真

Design and Simulation of Interface Chip Based on FPGA

分析了8255A芯片的结构和工作方式,用Verilog实现8255A芯片0方式下A、B口的读写,C口的置位,以及编程控制机制.经过ISE仿真与FPGA芯片的JTAG调试,结果证明:其功能能够满足接口实验的需求,为用FPGA扩展现有接口实验平台做出了探索.

This paper analyses the structure and working methods of 8255A chip, and then realizes the I/O of A,B ports, the set of C port, and programming control mechanisms under 0 mode . Through ISE Simulation and JTAG debug, we verify that its functions can meet the needs of interface experiments, and this work gives exploration about the expansion of the existing interface experiment platform by using FPGA .