Abstract: An 8 bit micro-controller is made，simulated and tested on QUARTUSII by means of a top-down and modular design method based on the integration of FPGA and VHDL.The micro-controller has 30 instructions which are divided into 4 categories of data transmission，arithmetic and logic operations，process control，input and output.The simulation result shows that the 8 bit micro-controller can implement the instructions correctly in the frequency range of 100 MHz.

Key words: Field Programmable Gate Array（FPGA）, Complex Instruction Set Computer（CISC）, Very high speed integrated circuit Hardware Description Language（VHDL）, simulation

摘要： 介绍了一种基于FPGA芯片的8位CISC微处理器系统，该系统借助VHDL语言的自顶向下的模块化设计方法，设计了一台具有数据传送、算逻运算、程序控制和输入输出4种功能的30条指令的系统。在QUARTUSII系统上仿真成功，结果表明该微处理器系统可以运行在100 MHz时钟工作频率下，能快速准确地完成各种指令组成的程序。

关键词: 现场可编程门阵列（FPGA）, 复杂指令集计算机（CISC）, 超高速集成电路硬件描述语言（VHDL）, 仿真