PIN DIAGRAM OF 8051 MICROCONTROLLER WITH EXPLANATION PDF

Generally, a Quartz Crystal Oscillator is connected here. It represents 0V and is connected to the negative terminal 0V of the Power Supply. Additionally, when external memory is interfaced, PORT 2 pins act as the higher order address byte. PORT 2 Pins have internal pull-ups. Using this pins, external Program Memory can be read. Using this Pins, external address can be separated from data as they are multiplexed by

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Low computing power. Specifications of Microcontroller — So now let us take a look at the important features of Microcontroller. The block diagram of is as follows — 8-bit Microcontroller — The Microcontroller is an 8-bit Microcontroller.

The data bus is utilized to carry data from specific operations. Consequently, the CPU can process 8 bits of data at one time. This memory is termed as ROM. This memory is known as RAM. Address Bus — A bus of the Microcontroller can be defined as a group of wire which can act as a medium for the transfer of data. There are two buses present in the Microcontroller. While we are already aware of the Data Bus, let us know about the Address Bus of the Microcontroller.

The address bus, which is used to address memory locations, is bit wide. Hence, for obvious reasons the address bus is unidirectional. Interrupts — The most powerful attribute of the Microcontroller is the concept of Interrupts.

Interrupts can be of various types, such as, Software and Hardware interrupts, Non-maskable and maskable interrupts, etc. Now the Microcontroller incorporates five interrupts. TF0 — Timer 0 Overflow Interrupt. TF1 — Timer 1 Overflow Interrupt. Additionally, these are some important features of microcontroller given as follows : Two bit Timers and Counters. A Data Pointer and a Program Counter of bit each. Consequently, it consists of 8 pins starting from pin 32 to pin Port 1 — The Port 1 or P1, is also an 8-bit port starting from pin 1 to pin 8.

Hence the sole purpose of P1 is for interfacing. Port 2 — The pins from 21 to 28 belong to the Port 2, or P2. The pin numbers are from 10 to The other functions are below.

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Microcontrollers - 8051 Pin Description

Low computing power. Specifications of Microcontroller — So now let us take a look at the important features of Microcontroller. The block diagram of is as follows — 8-bit Microcontroller — The Microcontroller is an 8-bit Microcontroller. The data bus is utilized to carry data from specific operations. Consequently, the CPU can process 8 bits of data at one time. This memory is termed as ROM.

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