COMPUTER SCIENCE Data Representation and Machine Concepts Section 2.1 Instructor: Lin Chen Sept 2013

2.1 Computer Architecture 2 Data Manipulation CPU Basic 0Sound%20Indicator/MYWEB5/68hc11.htm ALU CU RU CPU Memory … … C239 C23A Motorola 68HC11 Bus

2.1 Computer Architecture 2 Data Manipulation ALU CU RU CPU (Central Processing Unit) Memory … … C239 C23A C23B … Arithmetic/Logic Unit Perform operations on data Addition Subtraction …

2.1 Computer Architecture 2 Data Manipulation ALU CU RU CPU Memory … … C239 C23A C23B … Control Unit Coordinate the machine activities

2.1 Computer Architecture 2 Data Manipulation ALU CU RU CPU Memory … … C239 C23A C23B … Register Unit Store data temporarily

2.1 Computer Architecture 2 Data Manipulation ALU CU RU CPU Memory B6 C1 33 … … C239 C23A C23B … 16-bits memory address expressed as 4 hexadecimal number Each memory cell store 8-bits data

2.1 Computer Architecture 2 Data Manipulation ALU CU RU CPU Memory … … C239 C23A C23B … Add two numbers

2.1 Computer Architecture 2 Data Manipulation ALU CU 11 RU CPU Memory … … C239 C23A C23B … Add two numbers 1.Load first number to register

2.1 Computer Architecture 2 Data Manipulation ALU CU 11 RU 22 CPU Memory … … C239 C23A C23B … Add two numbers 1. Load first number to register 2. Load second number to register

2.1 Computer Architecture 2 Data Manipulation ALU CU 11 RU CPU Memory … … C239 C23A C23B … Add two numbers 1. Load first number to register 2. Load second number to register 3. Add two number and save the result in third register

2.1 Computer Architecture 2 Data Manipulation ALU CU 11 RU CPU Memory … … C239 C23A C23B … Add two numbers 1. Load first number to register 2. Load second number to register 3. Add two number and save the result in third register 4. Store the result to the memory