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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity mux2x1 is
Port ( i : in STD_LOGIC_VECTOR (1 downto 0);
s : in STD_LOGIC;
y : out STD_LOGIC);
end mux2x1;
architecture df of mux2x1 is
begin
with s select
y<= i(0) when '0',
i(1) when '1',
'0' when others;
end df;
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How can you write a VHDL code for full adder using two half adders?
Since a fulladder can be obtained by using 2 halfadders & 1 OR gate.....so we have to call an halfadder program as well as an OR program......this can be implemented easily with the help of structural model rather than dataflow and behavoioural model
What is VHDL program for parallel adder?
library IEEE;use IEEE.STD_LOGIC_1164.ALL;use IEEE.STD_LOGIC_ARITH.ALL;use IEEE.STD_LOGIC_UNSIGNED.ALL;entity pa isPort ( a : in STD_LOGIC_VECTOR (3 downto 0);b : in STD_LOGIC_VECTOR (3 downto 0);ci : in STD_LOGIC;co : out STD_LOGIC;s : out STD_LOGIC_VECTOR (3 downto 0));end pa;architecture Behavioral of pa is--signal declarationsignal c:std_logic_vector(2 downto 0);--component declarationcomponent fadfPort ( ain : in STD_LOGIC;bin : in STD_LOGIC;cin : in STD_LOGIC;sum : out STD_LOGIC;cout : out STD_LOGIC);end component;beginu0:fadf port map(a(0),b(0),ci,s(0),c(0));u1:fadf port map(a(1),b(1),c(0),s(1),c(1));u2:fadf port map(a(2),b(2),c(1),s(2),c(2));u3:fadf port map(a(3),b(3),c(2),s(3),co);end Behavioral;
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4!/(2!*2!) = 4*3*2*1/(2*1*2*1) = 6 4!/(2!*2!) = 4*3*2*1/(2*1*2*1) = 6 4!/(2!*2!) = 4*3*2*1/(2*1*2*1) = 6 4!/(2!*2!) = 4*3*2*1/(2*1*2*1) = 6
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How can you write a VHDL code for full adder using two half adders?
Since a fulladder can be obtained by using 2 halfadders & 1 OR gate.....so we have to call an halfadder program as well as an OR program......this can be implemented easily with the help of structural model rather than dataflow and behavoioural model
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A certificate program is 1-2 year program that you can take after you graduate college.
