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King Fahd University of Petroleum and Minerals Electrical Engineering Department EE 445

King Fahd University of Petroleum and Minerals Electrical Engineering Department EE 445 Course Presentation. Introduction to Microcontrollers Ali Al-Hajji Mohammad - 223210. Introduction. Home appliances: microwave oven, TV… Computer Equipments: printers, modems, …

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King Fahd University of Petroleum and Minerals Electrical Engineering Department EE 445

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  1. King Fahd University of Petroleum and Minerals Electrical Engineering Department EE 445 Course Presentation Introduction to Microcontrollers Ali Al-Hajji Mohammad - 223210

  2. Introduction • Home appliances: microwave oven, TV… • Computer Equipments: printers, modems, … • Cars: engine control, diagnostics, …. • Environmental control, aerospace, …..

  3. Objectives • Microcontrollers vs. Microprocessor • Microcontrollers Overview • Intel 8051 Microcontroller

  4. Microcontrollers vs. Microprocessor • Microprocessors is a general purpose computer. Multi chip required for all the functions. • Used to perform extensive calculations. • It is versatile and expensive.

  5. Microcontrollers vs. Microprocessor • Microcontrollers is a true computer on a single chip with limited RAM, ROM,..etc. • It is used to read data, perform limited calculations. • Used to control an operation with a fixed program.

  6. Microcontrollers vs. Microprocessor • Microcontrollers used in applications which cost, power and space are critical. • Single purpose device. • Mostly used in embedded systems.

  7. Microcontrollers Overview • There are many varieties. • MCS-51 Family of Microcontrollers. • ATMEL, AMD and Siemens as second source.

  8. Intel 8051 Microcontroller • generic MCS-51 IC is the 8051. • It is one of the most widely used microcontroller in the world. • All other microcontrollers of this family are modified version of 8051.

  9. Intel 8051 Features 8051 architecture contains the following: • - 8 bit CPU with registers A and B • - 4K bytes ROM • - 128 bytes RAM • - Four 8-bit I/O ports • - Two 16-bit timer/counters • - Serial Interface (programmable) • - Five interrupts

  10. Intel 8051 Block Diagram

  11. Intel 8051 RAM • 4 register banks • General user RAM • Special Function Registers (SFR)

  12. What are SFRs? • 8051 has many modes of operation. • 8051 can be manipulated by changing the values if theses SFRs • Each SFR has address

  13. Intel 8051 SFRs • Blue: related to the I/O ports • Yellow: control the configuration of 8051 • Green: auxiliary SFRs

  14. Intel 8051 Other Features • Timers: It is a counter that counts up whenever an instruction performed. • Example: MOV A,#60 • Major use is to measure time.

  15. For More Information www.8052.com THANK YOU

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