8 To 1 Multiplexer Vhdl

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8 To 1 Multiplexer Vhdl Rating: 5,8/10 7819 reviews
Multiplexer is simply a data selector.It has multiple inputs and one output.Any one of the input line is transferred to output depending on the control signal.This type of operation is usually referred as multiplexing .In 8:1 multiplexer ,there are 8 inputs.Any of these inputs are transferring to output ,which depends on the control signal.For 8 inputs we need ,3 bit wide control signal .
  1. 8 Bit 2 To 1 Multiplexer Vhdl Code
  2. 8 To 1 Multiplexer Vhdl
  3. Vhdl Code For 8 To 1 Multiplexer Using If Statement

vhdl code Write an 8:1 multiplexer module called mux8 with inputs S 2:0, d0,d1,d2,d3,d4,d5,d6,d7, and output y by using parameterized module. Zoom hack mac. Mux is a device That has 2^n Input Lines. But Only One has Output Line. Where n= number of input selector line. Mux is A device Which is used to Convert Multiple Input line into one Output Line. At a time only one Input Line will Connect to the output line. Which Input Line Connected In Output Line is decided by Input Selector Line. Alternate VHDL Code Using when-else. This code implements exactly the same multiplexer as the previous VHDL code, but uses the VHDL when-else construct. This is the same when-else as the first example (2 to 1 MUX), but this time multiple when-else constructs are used.

  • Multiplexer is simply a data selector.It has multiple inputs and one output.Any one of the input line is transferred to output depending on the control signal.This type of operation is usually referred as multiplexing.In 8:1 multiplexer,there are 8 inputs.Any of these inputs are transferring to output,which depends on the control signal.For 8 inputs we need,3 bit wide control signal.
  • I'm writing a VHDL code to model an 8x1 multiplexer where each input has 32-bit width. So I created an array to model the MUX but now I'm stuck with the Test Bench, it's gotten so complicated.

The input becomes output and vice versa. Here in the given figure, one case is highlighted when D7 input is ‘1’ all outputs a = 1, b=1, and c=1. You can verify other combinations from the truth table. In the next tutorial, we shall design 8×1 multiplexer and 1×8 de-multiplexer circuits using VHDL. USEFUL LINKS to VHDL CODES. Refer following as well as links mentioned on left side panel for useful VHDL codes. D Flipflop T Flipflop Read Write RAM 4X1 MUX 4 bit binary counter Radix4 Butterfly 16QAM Modulation 2bit Parallel to serial. RF and Wireless tutorials.


Working:If control signal is '000' ,then the first input is transferring to output line.If control signal is '111',then the last input is transferring to output.Similarly for all values of control signals.A simple block diagram of 8:1 multiplexer is shown here.
Now see the VHDL code of 8:1 multiplexer
LIBRARY IEEE;

8 Bit 2 To 1 Multiplexer Vhdl Code

USE IEEE.STD_LOGIC_1164.ALL;
ENTITY MUX8_1 IS
PORT(DIN:IN STD_LOGIC_VECTOR(7 DOWNTO 0);SEL:IN STD_LOGIC_VECTOR(2 DOWNTO 0);DOUT:OUT STD_LOGIC);
END MUX8_1;
ARCHITECTURE BEH123 OF MUX8_1 IS

8 To 1 Multiplexer Vhdl

BEGIN
PROCESS(DIN,SEL)
BEGIN
CASE SEL IS
WHEN'000'=>DOUT<=DIN(0);
WHEN'001'=>DOUT<=DIN(1);
WHEN'010'=>DOUT<=DIN(2);
WHEN'011'=>DOUT<=DIN(3);
WHEN'100'=>DOUT<=DIN(4);
WHEN'101'=>DOUT<=DIN(5);
WHEN'110'=>DOUT<=DIN(6);
WHEN'111'=>DOUT<=DIN(7);
WHEN OTHERS=>
DOUT<='Z';
END CASE;
END PROCESS;
END BEH123;

Vhdl Code For 8 To 1 Multiplexer Using If Statement

  1. Introduction


    An 8-to-1 multiplexer is a digital device that selects one of the eight inputs lines to the output line by using three-bit selection line. The block diagram of 8-to-1 Mux is shown in Figure 1. A 2n-to-1 multiplexer needs n bit selection line to select one of the 2n inputs to the output.
    Figure 1. Block diagram of 8-to-1 multiplexer

  2. Truth Table


    Figure 2 shows the truth table of the 8-to-1 multiplexer. I1 to I8 are the input lines, S1 - S3 are the selection lines and O is the output line.
    Figure 2. Truth table of 8-to-1 multiplexer

  3. Verilog Module

    Figure 3 shows the Verilog module of the 8-to-1 multiplexer. The 8-bit ports In1 to In8 are input lines of the multiplexer. The Sel port is the 3-bit selection line which is required to select between the eight input lines. 8-bit port Out is the output line of the multiplexer.
    Figure 3. Verilog module of 8-to-1 multiplexer

  4. Verilog Code for the 8-to-1 Multiplexer (mux8to1.v)



    Figure 4. Verilog Code for 8-to-1 multiplexer

  5. Verilog Test Bench for 8-to-1 Multiplexer (mux8to1_tb.v)



    Figure 5. Verilog Test-Bench for 8-to-1 multiplexer

  6. Timing Diagram

    Figure 6. Timing diagram of 8-to-1 multiplexer