Micropeocessor

Microprocessor Fundamentals Course The International Congress for global acquaintance and technology www.icgst.com Instructor: Ashraf Aboshosha, Dr. rer. nat. Engineering Dept., Atomic Energy Authority, eighth Section, Nasr City, Cairo, P. O. Box. 29 E-mail: aboshosha@icgst.com, Tel.: 012-1804952 Lecture Notes Lecture (4) Microprocessor Architecture and surgery Course course of study: Computer Architecture Microprocessor structure and Design Microprocessor programming and deed Microprocessor based Interfacing This is free educational material. Microprocessors have two major(ip) components The carrying out unit (EU) The Bus embrasure unit (BIU) The Execution unit (EU) is utilize mainly to act readings. It contains a roundabout called the arithmetical and logic unit (ALU). The ALU performs arithmetic ( + , - , * , / ) and logic (AND, OR, NOT) functions. The information for operations be stored in lap called Registers. A memorial is like a memor y attitude except that we normally refer to it by a reference rather than spoken language. The EU has eight registers for storing data; their label be AX, BX, CX, DX, SI, DI, BP, SP and FLAGS register. Bus interface unit (BIU) facilities communication betwixt the EU and memory or I/O circuits.

It is accountable for transmitting address, data, and control signals on the buses. Its registers are named CS, DS, ES, SS, IP; they sustenance addresses of memory locations. The IP contains the address of next instruction to be executed by the EU. The EU and the BIU are connected via an intrinsic bus and they work to depressher. firearm the EU is executing an instruction, the BIU fetc! hes up to six bytes of the next instruction and places them in the instruction queue. This operation is called Instruction prefetch. The purpose is to quicken up the processor. 1 I/O Ports : I/O devices are connected to the reckoner through I/O circuits. for each one of these circuits contains several(prenominal) register called I/O Ports. Some are used for data while others are used...If you want to get a full essay, order it on our website: BestEssayCheap.com

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