Unit 1.1 Systems Architecture

Unit 1.1 Systems Architecture

1. Embedded Systems

2. CPU & Fetch Decode Execute

   • Fetch In computer technology, fetch has several meanings related to getting, reading, or moving data objects.
   • execution are terms that describe the process of running a computer software program or command.
   • Decoding is the process of converting code into plain text or any format that is useful for subsequent processes.

3. Von Neumann Architecture

   • The Memory is used to store data i.e. RAM & ROM Data and Addresses are transformed to the CPU using Data & Addresses Bus
   • The Control Unit is used to control the functions and operation that are running in the CPU The Control Unit also maintains the MAR and the MDR.
   • The MDR is Memory Data Register The MAR is Memory Addresses Register
   • The ALU is used to calculate arithmetic operations & logic operations

4. Computer Components

   • • CPU - (central processing unit) it is basically the brain of the computer.
   • • Motherboard - it is a printed circuit board that connects all the computer parts together
   • • Graphics Card – a printed circuit board that controls the output display screen.
   • • Memory – it is a part of the computer that stores all the data and programmes so you can retrieve them back on a later date.
   • • Second storage – a device that refers to any non-volatile device that is external and internal to the computer.
   • • Network Cards – a network interface controller is a computer hardware component that connects a computer