How many pins are there in 8051?
40 pins
8051 microcontroller was 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.
Which pin of 8051 is connected?
In 8051, EA is connected to Vcc as it comes with on-chip ROM to store programs. For other family members such as 8031 and 8032 in which there is no on-chip ROM, the EA pin is connected to the GND. Pin 32 to pin 39 are port 0 pins also referred to as P0.
What are the 3 components of a microcontroller?
A microcontroller can be seen as a small computer, and this is because of the essential components inside of it; the Central Processing Unit (CPU), the Random-Access Memory (RAM), the Flash Memory, the Serial Bus Interface, the Input/Output Ports (I/O Ports), and in many cases, the Electrical Erasable Programmable Read …
What is the function of PIN 8051 RST?
Pin 9 (RST): Reset pin is used to Reset 8051 Microcontroller by giving a positive pulse to this Pin. Port3 (Pin 10 to 17): The Port3 Pins are similar to port1 pins and can be used as universal Input or output pins.
What is pin in microcontroller?
Pin 31 − This is ALE pin which stands for Address Latch Enable. It is used to demultiplex the address-data signal of port. Pins 32 to 39 − These pins are known as Port 0. It serves as I/O port. Lower order address and data bus signals are multiplexed using this port.
What is the other function of port pin P3 4 in the 8051?
An alternate function of port pin P3. 4 in the 8051 is: Timer 0 Timer 1.
What is microcontroller in simple words?
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.
What are special function registers in 8051?
- Categories of 8051 Microcontroller Special Function Registers.
- A or Accumulator (ACC)
- B (Register B)
- Data Pointer (DPTR – DPL and DPH)
- Stack Pointer (SP)
- PCON (Power Control)
- SCON (Serial Control)
- TCON (Timer Control)
What is a pins used for?
A pin is a device used for fastening objects or material together, and can have three sorts of body: a shaft of a rigid inflexible material meant to be inserted in a slot, groove, or hole (as with pivots, hinges, and jigs); a shaft connected to a head and ending in a sharp tip meant to pierce one or more pieces of soft …
What is a pin in microprocessor?
The 40 pins of the microprocessor can be divided into six groups such as address bus, data bus, control signals & status signals; power supply & frequency, externally started signals and serial input/output ports.