it has been found that the major limitations of typical 8-bit mcu are the alu structure based on accumulator , the clock system design and the cisc architecture adopted in mcs-51 design.
分析发现,在传统八位微处理器设计中,影响其整体性能的主要原因是:基于累加器的alu结构、cisc指令体系、时钟系统设计以及系统构架。