TRAINING

SEMINAR

8051

MICROCONT

ROLLER

SESSION’S AGENDA Introduction To 8051 Microcontroller Characteristics of 8051 Microcontroller Pin Diagram Of AT89C51 Programming Languages

• Assembly Language• High Level Language (Hardware C )

Software Used Led, 7 Segment, LCD And Its Interfacing Project Undergone

• Interfacing of Digital Clock With Visitor Counter

The Intel 8051 micro controller is the "grandfather" of all modern micro controllers. Over 10 manufacturers (including Intel) now make over 100 different varieties of 8051 micro controllers.

It was developed in 1971. The most commonly used 8051 ICs are

AT89C51,AT89S51. 8051 microcontroller enters the data in

HEXADECIMAL. Maximum Storage of 8 bit microcontroller is 255.

INTRODUCTION TO 8051 MICROCONTROLLER(MCU)

Characteristics of Microcontroller (MCU) RAM 128 Bytes ROM 4 KB Extended Memory up to 64 KB Architecture Von Neumann Technology CISC Power Required +5 V (DC) Bovd rate 9600 Packaging DLP Timers TMOD,TCON GPR 32 bits Frequency to run a program 921.6 KHz Time to run a program 1.085 μsec

Pin Diagram of AT89C51 It is 40 pin IC. It has 4 Port(P0,P1,P2,P3). It has 8 special pins and 32

general pins . 8 special pins are : 9th pin(Reset) has the highest

authority. 18,19 pins are for providing pulse

by crystal oscillator. 20 pin is generally grounded. 29 pin-PSEN(Program Store

Enable) 30 pin-ALE(Address Latch Enable) 31 pin-EA (Enable/External

access) 40 pin is given VCC i.e. power

ASSEMBLY LANGUAGE It is a Case Insensitive Language. Basic elements are Label, Comments, Operands,

Directives and Commands. A Label is a textual designation (generally an easy-to-

read word) for a line in a program, or section of a program .

Comment is a series of words that a programmer writes to make the program more clear and legible.

 An operand is a value on which the instruction is to be performed. The operand may be a processor register, a memory address, a literal constant, or a label.

Directive is similar to an instruction, but unlike an instruction it is independent on the microcontroller model, they are usually given purposeful meanings via variables or registers.

ASSEMBLY LANGUAGE Commonly used ,Commands are as following :

MOVSyntax : MOV desination,source Example: MOV R1,#20h h represents no is in hexadecimal R1 is a destination register# is pond sign Note: When there is an alphabet at MSB then 0 is always used before it i.e.

MOV R1,#0a4h MCU accepts 8 bit data hence to represents 0-9

no we use 0 before it i.e.MOV R1,#04h

ASSEMBLY LANGUAGE ADDSyntax: ADD desination,source ADD command is always used in accumulator. JZ Syntax: JZ A, labelJump if zero i.e. if A=0 then Jump to label Example: org 00h MOV A ,#0 JZ A,SS MOV R1,#6 SS:MOV R2,#23 END MOV R1,#6 will not be performed as it will jump to SS

ASSEMBLY LANGUAGE JNZSyntax :JNZ A, label

Jump if not zero i.e. if A≠0 then Jump to label Example: org 00h MOV A ,#10 JNZ A,SS MOV R1,#6 SS:MOV R2,#23 END MOV R1,#6 will not be performed as it will jump to SS DJNZ Same as JNZ only the value of the Accumulator is decremented INC/DEC Value of register is incremented and decremented CPLCompliment of the accumulators value

HIGH LEVEL LANGUAGESo Embedded C is a high level language

that is commonly used o Developed by Dennis Ritchie & Bell Labs o C is a Case Sensitive Languageso C use header file <reg51.h>o SPECIAL FUNCTION REGISTER

Sbit is used to set a bit high It is written before main function and after

header file

Software Required Keil software used to write program in either of the

language c or assembly Editor window HumanAssemblerLinker MachineOH Converter UC Proteus is used to design the software circuitry

It is used to see the code interaction with simulated Hardware in Real time.

Avaible for PIC,8051,MSP430,AVR,HC11,ARM7/LPC2000 and basic Stamp Processors

Light Emitting Diode And Its Interfacing Color: LEDs can emit light of an intended

color without using any color filters as traditional lighting methods need. This is more efficient and can lower initial costs.

Size: LEDs can be very small (smaller than 2 mm).

On/Off time: LEDs light up very quickly Applications :• Indicators and signs• Data communication and other signaling• Sustainable lighting

Design

XTAL218

XTAL119

ALE30

EA31

PSEN29

RST9

P0.0/AD0 39

P0.1/AD1 38

P0.2/AD2 37

P0.3/AD3 36

P0.4/AD4 35

P0.5/AD5 34

P0.6/AD6 33

P0.7/AD7 32

P1.01

P1.12

P1.23

P1.34

P1.45

P1.56

P1.67

P1.78

P3.0/RXD 10

P3.1/TXD 11

P3.2/INT0 12

P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

P2.7/A15 28

P2.0/A8 21

P2.1/A9 22

P2.2/A10 23

P2.3/A11 24

P2.4/A12 25

P2.5/A13 26

P2.6/A14 27

U1

AT89C51

D1

LED-BLUE

D2

LED-BLUE

D3

LED-BLUE

D4

LED-BLUE

D5

LED-BLUE

D6

LED-BLUE

D7

LED-BLUE

D8

LED-BLUE

7 Segment Display And Its Interfacing* It is generally of 2 types :Common Cathode It’s 3 and 8 pins

are grounded for its working

More Brighter More Logical

Common Anode It’s 3 and 8 pins

are given Vcc for its working

Less Brighter Less Logical

Design

LCD And Its Interfacing Liquid Crystal Display It is manufactured by Optrax. Available LCD 2x16,2x20,2x40.. 2x16 LCD has 16 pins that are

1-Ground 2-Vcc(+5V)Dc 3-Contrast Control 4-Register Select 5-Read/Write 6-Enable 7-14 –Data lines 15- Positive Terminal 16-Negative Terminal

Design

XTAL218

XTAL119

ALE30

EA31

PSEN29

RST9

P0.0/AD0 39

P0.1/AD1 38

P0.2/AD2 37

P0.3/AD3 36

P0.4/AD4 35

P0.5/AD5 34

P0.6/AD6 33

P0.7/AD7 32

P1.01

P1.12

P1.23

P1.34

P1.45

P1.56

P1.67

P1.78

P3.0/RXD 10

P3.1/TXD 11

P3.2/INT0 12

P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

P2.7/A15 28

P2.0/A8 21

P2.1/A9 22

P2.2/A10 23

P2.3/A11 24

P2.4/A12 25

P2.5/A13 26

P2.6/A14 27

U1

AT89S51

D714

D613

D512

D411

D310

D29

D18

D07

E6

RW5

RS4

VSS

1

VDD

2

VEE

3

LCD1LM016L

Interfacing of Digital Clock With Visitor Counter

Digital Clock

Visitor counter

Interfacing of Digital Clock With Visitor Counter

Main components of project

Interfacing of Digital Clock With Visitor Counter

XTAL218

XTAL119

ALE30

EA31

PSEN29

RST9

P0.0/AD0 39

P0.1/AD1 38

P0.2/AD2 37

P0.3/AD3 36

P0.4/AD4 35

P0.5/AD5 34

P0.6/AD6 33

P0.7/AD7 32

P1.01

P1.12

P1.23

P1.34

P1.45

P1.56

P1.67

P1.78

P3.0/RXD 10

P3.1/TXD 11

P3.2/INT0 12

P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

P2.7/A15 28

P2.0/A8 21

P2.1/A9 22

P2.2/A10 23

P2.3/A11 24

P2.4/A12 25

P2.5/A13 26

P2.6/A14 27

U1

AT89S51

D714

D613

D512

D411

D310

D29

D18

D07

E6

RW5

RS4

VSS

1

VDD

2

VEE

3

LCD1LM016L

THANK YOU