Design of a high performance microcontroller

A high performance 8-bit microcontroller, which shares the same instruction set with the standard Intel 8051, is presented in this paper. In system architecture, four-clock period per machine cycle architecture, Harvard architecture and pre-fetching instruction method are adopted to improve MCU´s power efficiency. In CPU architecture, ALU of purely combinational circuits, Independent multiplier and divider module, multi-clocks architectures and hardwired control unit are adopted to get high speed. Considering power consumption, gating clock method is used to reduce the power consumption. Mapped in CSMC06 0.6μm CMOS technology, this MCU is successfully synthesized and simulated with EDA tools and implemented in FPGA of Altera´s APEX20KE. As an IP core, the MCU core can be conveniently involved in SOC.