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 ?????