Skip to main content

HALF ADDER USING VHDL IN FPGA



A half adder is a simple digital circuit that performs addition of two single-bit binary numbers. It has two inputs (input1 and input2) and two outputs (sum and carry_out). The sum output is the XOR of the two inputs, and the carry_out output is the AND of the two inputs.

Here is an example of how you might implement a half adder in VHDL:

library ieee; 
use ieee.std_logic_1164.all; 
 entity half_adder is 
 port( 
 input1 : in std_logic; 
 input2 : in std_logic; 
 sum : out std_logic; 
 carry_out : out std_logic
    ); 
end half_adder; 
 architecture behavioral of half_adder 
is
begin

    -- Combinational logic to perform the addition 
 sum <= input1 xor input2; 
 carry_out <= input1 and input2; 
end 
behavioral;

This example defines a digital circuit with two inputs (input1 and input2) and two outputs (sum and carry_out). The combinational logic in the architecture block uses the XOR and AND operators to compute the sum and carry_out outputs, respectively.

To use the half adder to add two single-bit binary numbers, you would set the input1 and input2 signals to the binary numbers you want to add, and the sum and carry_out outputs will contain the result of the addition.

I hope this helps! Let me know if you have any questions.

Labels:

Comments

Post a Comment

Popular posts from this blog

SPI USING VHDL VERILOG ALONG WITH TEST BENCH

SPI (Serial Peripheral Interface) is a synchronous serial communication protocol that is commonly used for communication between integrated circuits. It has a simple, 4-wire interface: a clock (SCLK), a master output slave input (MOSI), a master input slave output (MISO), and a chip select (CS or SS). In a typical SPI communication, the master device generates the clock signal and controls the chip select signal to select the slave device it wants to communicate with. The master then sends data to the slave on the MOSI line, and the slave returns data to the master on the MISO line. The data is transmitted and received in parallel, with each bit being transmitted on a separate clock cycle. Here is an example of how you might implement an SPI interface in VHDL: Copy code library ieee;  use ieee.std_logic_1164.all;   entity  spi is    port (   sclk : in std_logic;   mosi : in std_logic;   miso : out std_logic;  cs : in ...
Post a Comment
Read more

how to write MSB and LSB in verilog

  In Verilog, you can use the concatenation operator "{" and "}" to specify the most significant bit (MSB) and least significant bit (LSB) of a vector.   For example, suppose you have a 4-bit vector called "data" and you want to select the LSB (data[0]) and the second most significant bit (data[2]). You can do this using the following code:   Copy code
Post a Comment
Read more

Types of communication interfaces ?

 Communication interfaces facilitate the exchange of data, signals, or information between different systems, devices, or components. Here are several types of communication interfaces commonly used in various domains: 1. Serial Communication Interface:    - Serial communication interfaces transmit data one bit at a time over a single communication channel. Examples include RS-232, RS-485, UART (Universal Asynchronous Receiver-Transmitter), SPI (Serial Peripheral Interface), and I2C (Inter-Integrated Circuit). 2. Parallel Communication Interface:    - Parallel communication interfaces transmit multiple bits simultaneously over multiple channels. They are typically faster than serial interfaces but may require more wires and are susceptible to signal degradation over longer distances. Examples include parallel ports, IDE (Integrated Drive Electronics), and parallel buses within computers. 3. Network Communication Interface:    - Network communication in...
Post a Comment
Read more