Introduction to 8051 Microcontroller
8051 is one of the first and most popular microcontrollers also known
as MCS-51. Intel introduced it in the year 1981. Initially, it came out as
an N-type metal-oxide-semiconductor (NMOS) based microcontroller,
but later versions were based on complementary metal-oxide-
semiconductor(CMOS) technology. These microcontrollers were
named 80C51, where C in the name tells that it is based on CMOS
technology. It is an 8-bit microcontroller which means the data bus is
8-bit. Therefore, it can process 8 bits at a time. It is used in a wide
variety of embedded systems like robotics, remote controls, the
automotive industry, telecom applications, power tools, etc.*
It is referred to as a System on a Chip (SoC) microcontroller because it
is a chip circuit/integrated circuit that holds many components of a
computer together on a single chip. These components include a
CPU, memory, input-output ports(I/O ports), timers, and secondary
storage.*Features –*There are some key features of 8051 that work as
a foundation for students to learn microcontrollers.*
8051 μc family member –
8051 μc have some family members 8052 microcontroller & 8031
microcontroller.*8052μc*has 8K bytes of on-chip program ROM
