【摘要】 文章提出了一种精简指令集8位单片机中,算术逻辑单元的工作原理。在此基础上,对比传统PIC方案、以及在ALU内部再次采用流水线作业的332方案、44方案,并用Synopsys综合工具实现了它们。综合及仿真结果表明,根据该单片机系统要求,44方案速度最高,比332方案可提高43.9%,而面积仅比最小的332方案增加1.6%。在分析性能差异的根本原因之后,阐明了该方案的优越性。更多还原

【Abstract】 Work principle for ALU in an 8_bit RISC Singlechip microcomputer is described. The traditional PIC scheme, 332 Pipeline scheme and 44 Pipeline scheme are compared on the base of the principle, which are implemented using Synopsys design tools. Results from synthesis and simulation shows that 44 scheme operates the fast, which is 43.9% faster and only 1.6% larger than 332 scheme. The essential reason why the performance is so different is analyzed. Then the advantage of 44 scheme is clarified.更多还原