PRESENTATION ON MICROCONTROLLER 8051

MADE BY:

1. JIBAN JYOTI GHOSH2. RISHITA SINHA3. POULAMY CHAKRABARTTY

4.PRITHA RUDRA5.DEBOPRIYA GUPTA

6.NILOTPAL MUKHERJEE

GUIDED BY:-PROF. SUDIPTO CHAKRABORTY

CONTENTS

1. Introduction2. Block Diagram3. Pin Diagram4. Design5. Circuit Diagram6. Temperature Sensor7. Analog to Digital Converter8. LCD9. Application10.Conclusion

INTRODUCTION

What is microcontroller?

A microcontroller is also known as a true computer on a single chip. It has a CPU,PC ,SP registers, in addition to a fixed amount of RAM,ROM and I/O ports,

including serial communication & timer, all embedded together on a single chip. In some microcontrollers an ADC & DAC are also embedded in a single chip.

MICROPROCESSOR VS MICROCONTROLLER

Microprocessor CPU is stand-alone, RAM, ROM, I/O, timer are separate Designer can decide on the amount of ROM, RAM and I/O ports. expensive versatility general-purpose

Microcontroller CPU, RAM, ROM, I/O and timer are all on a single chip fix amount of on-chip ROM, RAM, I/O ports for applications in which cost, power and space are critical single-purpose Dedicated purpose

BLOCK DIAGRAM

PIN DIAGRAM

IMPORTANT FEATURES

It provides many functions (CPU, RAM, ROM, I/O, interrupt logic, timer, etc.) in a single package 8-bit ALU, Accumulator and Registers; hence it is an 8-bit microcontroller 8-bit data bus - It can access 8 bits of data in one operation 16-bit address bus - It can access 216 memory locations - 64 kiB (65536 locations) each of RAM and ROM On-chip RAM - 128 bytes (data memory) On-chip ROM - 4 KB (program memory)

Four byte bi-directional input/output port UART (serial port) Two 16-bit Counter/timers Two-level interrupt priority Power saving mode

Design and implementation

CIRCUIT DIAGRAM

TEMPARATURE SENSORWe can measure temperature more accurately than a using a thermistor.

The sensor circuitry is sealed and not subject to oxidation, etc.The LM35 generates a higher output voltage than thermocouples and may not require that the output

voltage be amplified. That has an output voltage that is proportional to the Celsius temperature.The scale factor is.01V/oC

The LM35 does not require any external calibration or trimming and maintains an accuracy of +/-0.4 oC at room temperature and +/- 0.8 oC over a range of 0 oC to +100 oC.

Another important characteristic of the LM35DZ is that it draws only 60 micro amps from its supply and possesses a low self-heating capability. The sensor self-heating causes less than 0.1 oC temperature rise

in still air.

ANALOG TO DIGITAL CONVERTER

An analog-to-digital converter (ADC, A/D, or A to D) is a device that converts a continuous physical quantity (usually voltage) to a digital number that

represents the quantity's amplitude.The conversion involves quantization of the input, so it necessarily introduces a

small amount of error. Instead of doing a single conversion, an ADC often performs the conversions periodically. The result is a sequence of digital values that have been converted from a continuous-time and continuous-amplitude

analog signal to a discrete-time and discrete-amplitude digital signal.

LCD:This is a basic 16 character by 2 line display. Black text on Green background. Utilizes the extremely common HD44780 parallel interface chipset (datasheet

). Interface code is freely available. You will need ~11 general I/O pins to interface to this LCD screen. Includes LED backlight.

Applications:1.Temperature monitoring system in industries as well as in fire alarm systems where high rise in temperature

results in fire or damage to equipments.

2.Monitor the ambient temperature .

Conclusion & References1.Mazidi and Mazidi-8051,PIC & Embedded system using assembly language programming-Pearson Education.2.www.electronics-project-design.com

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