26-02-2011, 03:20 PM
presented by:
ARPITHA.R
[attachment=9187]
EMBEDDED SYSTEMS
INTRODUCTION TO EMBEDDED SYSTEM
An embedded system can be defined as the computing device that has computer hardware with software embedded in it as one of its most important component. It may be either an independent system or a part of a larger system.
Characteristics
• Application specific
- Optimize for cost, area, power, and performance
• Digital signal processing
- Signals are represented digitally
• Reactive
- Reacts to changes in the system’s environment
• Real-time
- Compute certain tasks before deadline
• Distributed ,networked
• Reliability
- Probability of system working correctly at fixed time
• Maintainability
- Probability of system working correctly fixed time units after error
occurred
• Safety
- Not harmful for user
• Security
- Confidential and authentic communication ibuted, networked,…
CATAGORIES OF EMBEDDED SYSTEM
Stand-alone Embedded Systems:-
As the name implies, stand-alone systems work in stand-alone mode.
They take inputs, process them & produce the desired output.
The input can be electrical signal from transducers or commands from a human being such as pressing of a button.
The output can be electrical signals to drive another system, an LED or LCD display for displaying of information of the user.
Real-time Systems:-
Embedded Systems in which some specific work has to be done in specific time period are called real-time systems.
Types of real-time systems
Hard real-time systems
Soft real time systems
Network Information Appliances:-
o Embedded systems that are provided with network interfaces & accessed by networks such as LAN or the Internet are called networked information appliances.
o Such embedded systems are connected to a network, typically a network running TCP/IP protocol suite, such as the Internet or the Company’s Intranet.
o These systems have emerged in recent years
ARPITHA.R
[attachment=9187]
EMBEDDED SYSTEMS
INTRODUCTION TO EMBEDDED SYSTEM
An embedded system can be defined as the computing device that has computer hardware with software embedded in it as one of its most important component. It may be either an independent system or a part of a larger system.
Characteristics
• Application specific
- Optimize for cost, area, power, and performance
• Digital signal processing
- Signals are represented digitally
• Reactive
- Reacts to changes in the system’s environment
• Real-time
- Compute certain tasks before deadline
• Distributed ,networked
• Reliability
- Probability of system working correctly at fixed time
• Maintainability
- Probability of system working correctly fixed time units after error
occurred
• Safety
- Not harmful for user
• Security
- Confidential and authentic communication ibuted, networked,…
CATAGORIES OF EMBEDDED SYSTEM
Stand-alone Embedded Systems:-
As the name implies, stand-alone systems work in stand-alone mode.
They take inputs, process them & produce the desired output.
The input can be electrical signal from transducers or commands from a human being such as pressing of a button.
The output can be electrical signals to drive another system, an LED or LCD display for displaying of information of the user.
Real-time Systems:-
Embedded Systems in which some specific work has to be done in specific time period are called real-time systems.
Types of real-time systems
Hard real-time systems
Soft real time systems
Network Information Appliances:-
o Embedded systems that are provided with network interfaces & accessed by networks such as LAN or the Internet are called networked information appliances.
o Such embedded systems are connected to a network, typically a network running TCP/IP protocol suite, such as the Internet or the Company’s Intranet.
o These systems have emerged in recent years
