Ch4 - EE 306 Introduction to Computing Chapter 4: The Von...

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Ramesh Yerraballi 4-1 EE 306 Introduction to Computing Chapter 4: The Von Neumann Model (Basic Components; Instruction Processing)
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Ramesh Yerraballi 4-2 The von Neumann Model Memory: holds the instructions and data Processing Unit: processes the information Input: external information into the memory Output: produces results for the user Control Unit: manages computer activity Memory (RAM) Processing Unit Input Output MAR MDR ALU TEMP Control Unit PC IR keyboard monitor
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Ramesh Yerraballi 4-3 Model Components Memory (RAM) Each location has an address and contents Address: set of bits that uniquely identify a memory location •(eg. 20 bits gives an address space of 2 20 locations) Addressability (Byte vs. Word): •The size of the memory location referenced by a given address LC-3 deals only with keyboard and monitor More details later
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4-4 CPU Processing Unit ALU (Arithmetic and Logic Unit) •Generally operates on entire words of data •Some also work on subsets of words (eg. bits and bytes) Registers: •Small, fast “on-board” storage for words •Close to the ALU (much faster access than RAM) Control Unit Program Counter (PC) or Instruction Pointer Holds the address of the next instruction to be executed Instruction Register (IR)
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This note was uploaded on 04/17/2008 for the course EE 306 taught by Professor Ambler during the Spring '07 term at University of Texas at Austin.

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Ch4 - EE 306 Introduction to Computing Chapter 4: The Von...

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