- Microprocessor Tutorial
- Microprocessor - Home
- Microprocessor - Overview
- Microprocessor - Classification
- 8085 Microprocessor
- Microprocessor - 8085 Architecture
- 8085 Pin Configuration
- Addressing Modes & Interrupts
- 8085 Instruction Sets
- 8086 Microprocessor
- Microprocessor - 8086 Overview
- 8086 Functional Units
- 8086 Pin Configuration
- 8086 Instruction Sets
- Microprocessor - 8086 Interrupts
- 8086 Addressing Modes
- Multiprocessor Configuration
- Configuration Overview
- 8087 Numeric Data Processor
- I/O Interfacing
- I/O Interfacing Overview
- 8279 Programmable Keyboard
- 8257 DMA Controller
- Microcontrollers
- Microcontrollers - Overview
- Microcontrollers - 8051 Architecture
- 8051 Pin Description
- 8051 Input Output Ports
- Microcontrollers - 8051 Interrupts
- Peripheral Devices
- Programmable Peripheral Interface
- Intel 8255A - Pin Description
- 8253 - Programmable Interval Timer
- 8253/54 - Operational Modes
- Microprocessor Useful Resources
- Microprocessor - Quick Guide
- Microprocessor - Useful Resources
- Microprocessor - Discussion
Microcontrollers - 8051 Architecture
8051 microcontroller is designed by Intel in 1981. It is an 8-bit microcontroller. It is built with 40 pins DIP (dual inline package), 4kb of ROM storage and 128 bytes of RAM storage, 2 16-bit timers. It consists of are four parallel 8-bit ports, which are programmable as well as addressable as per the requirement. An on-chip crystal oscillator is integrated in the microcontroller having crystal frequency of 12 MHz.
Let us now discuss the architecture of 8051 Microcontroller.
In the following diagram, the system bus connects all the support devices to the CPU. The system bus consists of an 8-bit data bus, a 16-bit address bus and bus control signals. All other devices like program memory, ports, data memory, serial interface, interrupt control, timers, and the CPU are all interfaced together through the system bus.
