The Design Of A MCU Based On VHDL

The Electronic Design Automation(EDA) technology has become an importantdesign method of analog and digital circuit system as the integrated circuit'sgrowing. The EDA technology, which is closely connected with the electronictechnology, microelectronics technology and computer science, can be used indesigning electronic product automatically. It was firstly put forwarded In70s.And till now there has been three stages of the EDA. That is the computeraided design (CAD) of electronic circuit in 70s,the computer aided engineering(CAE) in 80s and the electronic system design automation(ESDA) in 90s. TheESD A, Which is called EDA now ,is based on the automatic synthesizer and thehardware description language (HDL) . The design result of EDA can not only beverified by FPGA/CPLD but also be implemented through the ApplicationSpecific Integrated Circuit (ASIC). One important characteristic of the EDA isthat the design documents should be completed by the HDL. The VHDL is oneof the standard hardware description languages validated by IEEE, which wasfirstly introduced in 1982. And it was widely used by electronic designer now. We firstly present some background information of EDA, PLD devices inthis thesis.The principle and analyze of Intel8051 then was introduced .and thenintroduced the information about the FPGA/CPLD ,VHDL language and thesoftware MAXPLUS, also the design plan is introduced. The design of a digital8051 system, which is fulfilled by the VHDL, is also be discussed. Finally thecurrent development trend of the EDA and my several experiences about thedesigning of the system are related. The key point in this paper is the method how to design the CPU and theDAC. It's mainly focus on the realization of ALU, the method to design the Finite IIAbstractState Machine in the control unit and the realization of the Σ - △ modulationarithmetic with VHDL. Through the design and realization of the arithmetic above, wecan know the VHDL have lots of advantage and characteristic in realizing the designof arithmetic level.