This presentation is a try to make you understand few points of embedded system. hope you'll get benefit from this.

1. A
PRESENTATION
ON
“EMBEDDED SYSTEM”
BY ARMBEDDED ELECTRONICS PVT.
LTD.

2. 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 ?????

3. • Perform repititive
task .
• Provide High
Accuracy .
• Increase Speed .
• Increase efficiency.
• Reduce time .

4. 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 .

5. COMPARISON B/W MCU & MPU
M 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 S S 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.

6. PIN DIAGRAM OF MICROCONTROLLER

7. FEATURES OF 8051 MICROCONTROLLER
ROM
RAM
Timer
I/O Pins
4 k byte
128byte
2
32

8. BASIC ELECTRONIC COMPONENTS
USED :-
1.Light emitting diode (LED).
2.Liquid crystal defect (LCD).
3.Seven segment display.
4.7805 IC.

9. 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”.

10. 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).

11. 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

12. 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

13. 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).

14. 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.

15. *Thank You!!

16. *