Analysis and Comparison of Two Different Implementations of MCS-51 Compatible Microcontrollers

This paper properties of a single cycle implementation of MCS-51 compatible microcontroller and a four cycle implementation one in the way of instruction timing, circuit implementation and synthesis result. And the part of circuit implementation focuses on system architecture, instruction execution details acquired from RTL level and the ports. In addition to the contrast, the paper discusses the similarities and differences between the two circuits in IP reuse briefly.