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Microcontroller Basics and its Applications with Architecture and Pin diagram
- 1. MICROCONTROLLER-8051 MICROCONTROLLER-8051 Features & Applications Features& Applications Presenting By: Dr. Suhas A R Associate Professor Department of ECE HKBKCE, Bengaluru-45 07/14/25 Dr. Suhas A R 1
- 2. Its notan exaggeration if I say that ,today there is no electronic gadget on the earth which is designed without a Microcontroller. Ex: communication devices, digital entertainment, portable devices etc… Personal information products: Cell phone, pager, watch, pocket recorder, calculator Personal information products: Cell phone, pager, watch, pocket recorder, calculator Laptop components: mouse, keyboard, modem, fax card, sound card, battery charger Laptop components: mouse, keyboard, modem, fax card, sound card, battery charger Home appliances: door lock, alarm clock, thermostat, air conditioner, TV remote, VCR, Home appliances: door lock, alarm clock, thermostat, air conditioner, TV remote, VCR, small refrigerator, exercise equipment, washer/dryer, microwave oven small refrigerator, exercise equipment, washer/dryer, microwave oven Industrial equipment: Temperature/pressure controllers, Counters, timers, RPM Industrial equipment: Temperature/pressure controllers, Counters, timers, RPM Controllers Controllers Toys: video games, cars, dolls, etc. Toys: video games, cars, dolls, etc. Why do we need to learn Why do we need to learn Microcontrollers ? Microcontrollers ? 07/14/25 Dr. Suhas A R 2
- 3. Then What isa Microcontroller ? A smaller computer On-chip RAM, ROM, I/O ports... Example ： Motorola’s 6811, Intel’s 8051, Zilog’s Z8 and PIC 16X RAM ROM I/O Port Timer Serial COM Port CPU A single chip Microcontroller 07/14/25 Dr. Suhas A R 3
- 4. How is itdifferent from a How is it different from a Microprocessor ?? Microprocessor ?? General-purpose microprocessor CPU for Computers No RAM, ROM, I/O on CPU chip itself Example ： Intel’s x86, Motorola’s 680x0 CPU General- Purpose Micro- processor RAM ROM I/O Port Timer Serial COM Port Data Bus Address Bus 07/14/25 Dr. Suhas A R 4
- 5. Types of Microcontrollers Typesof Microcontrollers 07/14/25 Dr. Suhas A R 5
- 6. Microcontroller Architectures Microcontroller Architectures CPU Program +Data Address Bus Data Bus Memory Von Neumann Architecture CPU Program Address Bus Data Bus Harvard Architecture Memory Data Address Bus Fetch Bus 0 0 0 2n 07/14/25 Dr. Suhas A R 6
- 7. Important Features of8051 Important Features of 8051 4K bytes ROM 4K bytes ROM 128 bytes RAM 128 bytes RAM Four 8-bit I/O ports Four 8-bit I/O ports Two 16-bit timers Two 16-bit timers Serial interface Serial interface 64K external code memory space 64K external code memory space 64K data memory space 64K data memory space 07/14/25 Dr. Suhas A R 7
- 8. “ “Original” 8051 Microcontroller Original”8051 Microcontroller Oscillator and timing 4096 Bytes Program Memory (ROM) 128 Bytes Data Memory (RAM) Two 16 Bit Timer/Event Counters 8051 CPU 64 K Byte Bus Expansion Control Programmable I/O Programmable Serial Port Full Duplex UART Synchronous Shifter Internal data bus External interrupts subsystem interrupts Control Parallel ports Address Data Bus I/O pins Serial Input Serial Output 07/14/25 Dr. Suhas A R 8
- 9. PSW REGISTER PSW REGISTER 07/14/25Dr. Suhas A R 9
- 10. Addressing Modes Addressing Modes The CPU can access the data in various ways. The CPU can access the data in various ways. The data The data could be in register, or in memory or be provided as an could be in register, or in memory or be provided as an immediate value. immediate value. Types of addressing modes: Types of addressing modes: Immediate Addressing mode. Ex: MOV A, #0AH Immediate Addressing mode. Ex: MOV A, #0AH Register Addressing mode. Ex: MOV A, R0 Register Addressing mode. Ex: MOV A, R0 Direct Addressing mode. Ex: MOV R0, 40H Direct Addressing mode. Ex: MOV R0, 40H Register indirect Addressing mode. Ex: MOV A, @R0 Register indirect Addressing mode. Ex: MOV A, @R0 Indexed Addressing mode. Ex: MOVC A, @A+DTPR Indexed Addressing mode. Ex: MOVC A, @A+DTPR 07/14/25 Dr. Suhas A R 10
- 11. Instruction Set of8051 Instruction Set of 8051 Based on the operations performed, the Based on the operations performed, the instruction set of 8051 are classified as: instruction set of 8051 are classified as: Data transfer Instructions Data transfer Instructions Arithmetic Instructions Arithmetic Instructions Logical Instructions Logical Instructions Boolean Instructions Boolean Instructions Branching Instructions Branching Instructions 07/14/25 Dr. Suhas A R 11
- 12. 1. Consumer Electronics 1.Consumer Electronics Ex: Washing machines, Microwave ovens Ex: Washing machines, Microwave ovens 2. Automotive Systems 2. Automotive Systems Ex: Speed sensing and control, Wiper and light automation Ex: Speed sensing and control, Wiper and light automation 3. Industrial Automation 3. Industrial Automation Ex: Robotic arms control, Process monitoring and control Ex: Robotic arms control, Process monitoring and control 4. Communication Systems 4. Communication Systems Ex: Serial communication control (UART), Modem Ex: Serial communication control (UART), Modem interfacing interfacing 5. Medical Devices 5. Medical Devices Ex: Portable ECG machines, Blood pressure monitors Ex: Portable ECG machines, Blood pressure monitors Microcontroller Applications Microcontroller Applications 07/14/25 Dr. Suhas A R 12
- 13. Thank You Thank You 07/14/25Dr. Suhas A R 13
Editor's Notes
- #8 Program memory – RAM or ROM? Data memory – RAM or ROM?