EMBEDDED SYSTEMAn embedded system consists of hardware and software. When chips are built into systems and software is loaded on that for a particular functionality, it becomes an embedded system.
Embedded systems are the micro-processor/micro-controller based computing/control systems which are designed to perform a specific or a set of tasks.
General purpose systems
• General purpose systems i.e. a single system can perform variety of operations.
• System designer decides the features and their strength.
•Bulky and costly.
Embedded systems
• Designed to perform a specific task. i.e. a limited operations.
• Features of the system are constrained.
• Comparatively optimized.
e.g. Personal computers, Laptops etc.
e.g. Calculators, Robots, Automation control etc.
Microprocessor Based System
• Minimization Of Circuit.• Reliable• Power Efficient• Production when done even on Medium-
scale is cost effective
ROBOTICS AUTOMATIC DOORS
LED DISPLAY PANEL
AUTOMOTIVE ELECTRONICS
ARTIFICIAL SATTELITE
HEART PULSE RATE METER
i-PODS Smart phones
Washing Machine
Camcorders
MICROCONTROLLER
OUTPUT
INPUT
Subsystems of Embedded System
Three main subsystems– Microcontroller– Memory• To store program• To store data– Input & Output• Interconnectingelements
Device name ROM RAMAT89C1051 1K 64 bytesAT89C2051 2K 128 bytesAT89C4051 4K 128 bytesAT89C51 4K 128 bytesAT89C52 8K 256 bytesAT89C55 20K 256 bytesAT89S51 4 K 128 bytesAT89S52 8 K 256 bytesAT89S53 12K 256 bytes
AT89 Series Microcontrollers
OTHER HARDWARE Power Source
LED
Seven Segment Display
LCD
Keypad/Keyboard
Motors• DC motor• Stepper Motor
Interrupt
Digital to Analog convertor
Analog to Digital convertor
OTHER HARDWARE RF Radio Frequency
DTMF Dual Tone Multi Frequency
IR Infrared
Temperature Sensor
PIR sensor (Motion Sensor)
RFID (card / tag) Reader
Companies
• SAMSUNG• ST ELECTRONICS• NOKIA• APPLE• MOTOROLA• DRDO• AND MANY MORE……………..
