VCC - 5V Supply Port 0(p0.0 to p 0.7): It is eight bit bidirectional I/O port. During external memory access, it functions as multiplexed data and law order address bus AD0-AD7. Port 1(P1.0 to P 1.7): It is eight bit bidirectional I/O port, when logic 1 then it works as Input mode. Port 2(P2.0 to P2.7): It is [...]
Block Diagram of 8051 Microcontroller Microcontroller has built in RAM for internal processing and it has two bus Data bus Address bus It has 8 bit processing unit and 8 bit and 8 bit and 8 bit accumulator, and have 8 bit and 16 bit registers. CPU It monitors controls all operations that are performed [...]
Introduction 8051 has internally Harvard architecture developed by Intel in 1970s for use in embedded systems. It has basic features of microprocessors with internal ROM, RAM, input output ports inbuilt on a single chip. Microcontroller is a device in which entire computer manufactured on a single chip. Microcontroller has 3 basic sizes: Standard, short, extended [...]
In this tutorial we understand the interfacing of LED with 8051 microcontroller. Here is the first pattern to glow all LED’s connected with output AT89C51. Circuit Principle The main principle of circuit is to interface LED’s to the 8051 microcontroller and performing different patterns with LED’s. Here first i have introduce a very basic operation [...]
