Design of a new type 8-bit RISC MCU IP core

The MCU is widely used in the field of communications, consumer electronics, medical, instrumentation etc. In this paper, an 8-bit MCU IP core is proposed, which integrated a flash controller, a USB 2.0 control modules and a LCD drivers. RISC instruction is introduced and one level pipeline is implemented by single-cycle instruction with the Harvard bus architecture. The IP core can achieve 4MIPS at 4MHz clock. And work efficiency is 12 times faster than the average 51 series MCU. The parallel BCH codec algorithm is used in the flash controller, correcting 8 bits random errors in 528 bytes data and access speed up to 20Mbps. A new driver 3 lines MLA algorithm is adopted in LCD driver module; hence it can reduce number of the segment driving voltage, difficulty of design and area. FPGA verification result shows that the performance of the chip meets the demand. This MCU IP core has broad market prospect in electronic consumer products.