A PRESENTATION ON“EMBEDDED SYSTEM”BY ARMBEDDED ELECTRONICS PVT. LTD.
A COMPUTER SYSTEM DESIGN USED TO PERFORM ONE OR VERY FEWER TASK .
EMBEDDED SOFTWARE AND COMPUTER HARDWARE CAN BE PROGRAMMED TO PERFORM A SPECIFIC TASK .
EXAMPLES :- 1. DIGITAL CAMERA. 2. REMOTE OF T.V.
WHAT IS EMBEDDED SYSTEM ?????
BENEF
ITS O
F
EMBED
DED S
YSTEM
• Perform repititive task .
• Provide High Accuracy .
• Increase Speed .• Increase
efficiency.• Reduce time .
MICROCONTROLLER• It is the core hardware of
embedded system.• CPU, RAM, ROM , I/O ports, timer
are all on single chip.• Sometime it may referred as
“small computer”.• Examples : Motorola 6811,
Zilog’s z8, Intel’s 8051, Phillips 89V51RD2, Atmel .
COMPARISON B/W MCU & MPUM I C R O C O N T R O L L E R
1. Single tasking device.
2. CPU, RAM, ROM, I/O port and timers are all on a single chip.
3. Fixed amount of on chip ROM, RAM.
4. Cheap, non- versatile.
5. Applications :- Digital clock, washing machine.
M I C R O P R O C E SS O R
1. Multi tasking device.
2. CPU stands alone, RAM, ROM, I/O ports and timers are separate.
3. Designer can decide the amount of RAM, ROM.
4. Expensive, versatile.
5. Applications :- Laptops, Smart phones etc.
PIN DIAGRAM OF MICROCONTROLLER
FEATURES OF 8051 MICROCONTROLLER
ROMRAM
TimerI/O Pins
4 k byte
128byte2
32
BASIC ELECTRONIC COMPONENTS USED :-
1.Light emitting diode (LED).2.Liquid crystal defect (LCD).3.Seven segment display.4.7805 IC.
LIGHT EMITTING DIODE (LED)
• A LED is a semiconductor light source.
• LED’s are used as an indicator lamps in many devices.
• These are available in “SINGLE COLOUR”, “BICOLOUR”, “TRICOLOUR” and in “MULTICOLOUR”.
LIQUID CRYSTAL DISPLAY (LCD)
• LCD is a cheap and easiest way to display text, numbers, letters & symbols.
• It comprises of 16 pins .
• It consists of several initialization commands. namely – specify function Set (38H), display on-off control (0EH), entry mode set (06H) and clear display (01H).
SEVEN SEGMENT DISPLAY
• Several LED’s are combined together to form a seven segment display.
• There are two common configuration of 7- segment display. Namely –
common cathode display
common anode display
Digit
&NO.
0 1 2 3 4 5 6 7 8 9
A On Off On On Off On On On On On
B On On On On On Off Off On On On
C On On Off On On On On On On On
D On Off On On Off On On Off On On
E On Off On Off Off Off On Off On Off
F On Off Off Off On On On Off On On
G off off On on On On On Off on on
Table to display number from 1 to 9
7805 IC
• 7805 is a voltage regulated integrated circuit.
• The voltage regulated integrated circuit maintain the output voltage at aconstant level.
• It doesn’t require any external components to provide constant, regulated power.
• For this, input voltage must always be higher than output voltage by some minimum amount (typically 2 volt).
CONCLUSION
• EMBEDDED SYSTEM is widely used and evolving technology in electronics world.
• It provide automation and hence reduce human efforts.
• Nowadays, embedded system is one of the technology that retains its feet in the various applications.
*Thank You!!
*QUERY ?????
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