基于R ISC技术的实现单字节乘法的M CU设计

Using MCU Design Realize Single Byte Multiplication Based on RISC Technology

基于R ISC技术实现单字节乘法的微控制器设计主要包括:R ISC指令集的选取、取指单元、译码单元、执行单元的设计。该微控制器包含8个模块:8位指令存储器、12位程序计数器、12位地址选择器、可进行16位加法的算术运算器、16位累加器、16选8的数据选择器、8位数据控制器以及状态机。为了进行测试,又增加了3个外围模块:RAM,ROM和addr_decode。设计使用可综合的V erilog语言描述,M ode ls im 5.7 PE软件仿真。

The design of MCU that carry out 8 bit multiplication is based on the RISC technology. It includes the fetch of RISC instruction set,the design of fetch instruction unit,decode unit and excution unit. The MCU is composed of 8 bit instruction register, 12 bit program counter, 12 bit address selector,ALU that can carry out 16 bit addition, 16 bit accumulator ,a data selector that output is 8 bit from 16 bit input,8 bit data selector and a state machine. To test the MCU,using the three outer module： RAM,ROM and decoder. The design is descripted by Verilog and the simulation is carryied out by Modelsim 5.7 PE.