What are the on chip peripherals of 8051 microcontroller?
What are the on chip peripherals of 8051 microcontroller?
Brief History of 8051 In 1981, Intel introduced an 8-bit microcontroller called the 8051. It was referred as system on a chip because it had 128 bytes of RAM, 4K byte of on-chip ROM, two timers, one serial port, and 4 ports (8-bit wide), all on a single chip.
Why Intel 8051 is known as a computer on chip?
Microcontroller 8051 may be called computer on chip since it has basic features of microprocessor with internal ROM, RAM, Parallel and serial ports within single chip. Or we can say microprocessor with memory and ports is called as microcontroller.
Does 8051 have on chip oscillator?
The 8051 has On-Chip crystal oscillator of 12MHz. We can drive 8051 also using the external clock sources. So to use external clock sources, there are XTAL1 and XTAL2 pins in the microcontroller. 8051 has four 8-bit IOports called Port0, Port1, Port2 and Port3.
What is used to program and control the different peripherals of an 8051 microcontroller?
The main features of the 8051 microcontroller architecture include the following. 8-bit CPU through two Registers A & B. 8K Bytes – Internal ROM and it is a flash memory that supports while programming the system. These registers control various peripherals such as Serial Port, Timers, all I/O Ports, etc.
What is the need for interfacing?
Interfacing is one of the important concepts in microcontroller 8051 because the microcontroller is a CPU that can perform some operation on a data and gives the output. However to perform the operation we need an input device to enter the data and in turn output device displays the results of the operation.
What are microcontroller peripherals?
A peripheral is a part of a microcontroller that interfaces with the outside world. Examples of peripherals are GPIOs, I2C, SPI, UART, timers, and USB.
Which architecture is used by 8051?
Harvard architecture
Intel 8051 (MCS-51) The Intel MCS-51 (commonly termed 8051) is an internally Harvard architecture Complex instruction set computer (CISC) Instruction set single chip microcontroller (µC) series developed by Intel in 1980 for use in embedded systems.
Why 8051 is called 8bit microcontroller?
The 8051 is called an 8-bit microcontroller because it processes 8 bits of data every machine cycle. All assembly instructions happen 8-bits at a time. Also, all internal registers are 8-bit in size and all read and write operations happen 8-bits at a time.
How many ports are available in 8051?
4 I
8051 microcontrollers have 4 I/O ports each of 8-bit, which can be configured as input or output. Hence, total 32 input/output pins allow the microcontroller to be connected with the peripheral devices.
What is a Microcontroller chip?
A microcontroller (MCU for microcontroller unit) is a small computer on a single metal-oxide-semiconductor (MOS) integrated circuit (IC) chip. A microcontroller contains one or more CPUs (processor cores) along with memory and programmable input/output peripherals.
Which architecture is used in 8051?
The 8051 is CISC based architecture. It follows the Harvard architecture principles of memory interface, so has separate program & data memory.
What is interfacing chip?
The interfacing process includes some key factors to match with the memory requirements and microprocessor signals. The interfacing circuit therefore should be designed in such a way that it matches the memory signal requirements with the signals of the microprocessor.
