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1. Topic: 8051 Micro-controller
Course code: CSE-323
Course title: Microprocessors & Assembly Language Programming
Submission date: 11.12.2017

2. Content:
 About 8051 Microcontroller.
 Types of Microcontroller.
 8051 Microcontroller PIN Diagram.
 Architecture of Microcontroller.
 Features of Microcontroller.
 Application of Microcontroller.
 Comparison between microprocessor & microcontroller.
 Advantage & disadvantage of Microcontroller.
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3. Microcontroller:
Definition: A microcontroller is a self-contained system with peripherals,
memory and a processor that can be used as an embedded system.
If we will go back to history the 8051 microcontroller was first invented in
the year 1980 by the microprocessor giant Intel and gradually it has been
accepted worldwide and with the every coming days the importance of the
8051 microcontroller is escalating. When it was invented by the Intel, it
was developed by means of NMOS technology.
Example:
Motorola’s 6811
Intel’s 8051
Zilog’s Z8
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4. Different types of Microcontroller:
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5. 8051 microcontroller PIN diagram:
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6. Architecture of 8051 Microcontroller:
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Universal
Asynchronous
Receiver and
Transmitter
also known as
serial port.
Frequency
Reference counter

7. Features of Microcontroller:
Intel introduced 8051, referred as MCS-51, in 1981
The 8051 is an 8-bit processor
• The CPU can work on only 8 bits of data at a time
• 1 to 16 MHz clock
The 8051 has
• 128 bytes of RAM
• 4K bytes of on-chip ROM
• Two timers
• One serial port
• 4 I/O ports, each 8 bits wide
• 2 external and 3 internal interrupt sources
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8. Applications of Microcontroller:
In the section of Home,
 Appliances, intercom, telephones, security systems, garage door openers,
answering machines, fax machines, TVs, cable TV tuner, VCR, camcorder,
remote controls, video games, cellular phones, musical instruments, sewing
machines, lighting control, paging, camera, pinball machines, toys, exercise
equipment.
Office
 Telephones, security systems, fax machines, microwave, copier, laser printer,
color printer, paging.
Auto
 Navigation system, engine control, air bag, ABS, instrumentation, security
system, transmission control, entertainment, climate control, cellular phone,
keyless entry.
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9. Comparison between Microprocessor & Microcontroller:
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Microprocessor Microcontroller
CPU is stand alone, RAM, ROM, I/O,
timer are separate.
CPU, RAM, ROM, I/O and timer are
all on a single chip
designer can decide on the amount of
ROM, RAM and I/O ports.
fix amount of on-chip ROM, RAM,
I/O ports
Expansive. Highly .bit addressable

10. Advantage of Microcontroller:
• The overall system cost is high
• A large sized PCB is required for assembling all the components
• Overall product design requires more time
• Physical size of the product is big
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• The system design now requires very little efforts
• On chip ROM provide a software security
• The product is of small size compared to micro processor based system
Disadvantage of Microcontroller:

11. Review:
THANK YOU
- Sabbir Ahmed
- Id: 002 15 206 004
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 About 8051 Microcontroller.
 Types of Microcontroller.
 8051 Microcontroller PIN Diagram.
 Architecture of Microcontroller.
 Features of Microcontroller.
 Application of Microcontroller.
 Comparison between microprocessor & microcontroller.
Advantage & disadvantage of Microcontroller.