use IEEE.STD_LOGIC_1164.ALL;
ENTITY NAND_GATE IS
PORT(A,B:IN STD_LOGIC;C:OUT STD_LOGIC);
END NAND_GATE;
ARCHITECTURE NAND_ARCH OF NAND_GATE IS
BEGIN
C<=(NOT(A AND B));
END NAND_ARCH;
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY HALF_ADDER IS
PORT(A,B:IN STD_LOGIC;SUM,CARRY:OUT STD_LOGIC);
END HALF_ADDER;
ARCHITECTURE HALF_ADDER_ARCH OF HALF_ADDER IS
SIGNAL X1,X2,X3:STD_LOGIC;
COMPONENT NAND_GATE
PORT(A,B:IN STD_LOGIC;C:OUT STD_LOGIC);
END COMPONENT;
BEGIN
STEP1:NAND_GATE PORT MAP (A,B,X1);
STEP2:NAND_GATE PORT MAP (A,X1,X2);
STEP3:NAND_GATE PORT MAP (B,X1,X3);
STEP4:NAND_GATE PORT MAP (X2,X3,SUM);
CARRY<=((A NAND B)NAND (A NAND B));
END HALF_ADDER_ARCH;
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY BITFULLADDER IS
PORT(A,B,CIN:IN STD_LOGIC;SUM,CARRY:OUT STD_LOGIC);
END BITFULLADDER;
ARCHITECTURE BITFULLADDER_ARCH OF BITFULLADDER IS
COMPONENT HALF_ADDER
PORT(A,B:IN STD_LOGIC;SUM,CARRY:OUT STD_LOGIC);
END COMPONENT;
SIGNAL Z1,C1,C2: STD_LOGIC;
BEGIN
STEP5:HALF_ADDER PORT MAP(A,B,Z1,C1);
STEP6:HALF_ADDER PORT MAP(CIN,Z1,SUM,C2);
CARRY<=((C1 NAND C1) NAND (C2 NAND C2));
END BITFULLADDER_ARCH;
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
use IEEE.numeric_bit.all;
entity multiplierr is
Port ( x : in STD_LOGIC_VECTOR (03 downto 0);
y : in STD_LOGIC_VECTOR (03 downto 0);
z : out STD_LOGIC_VECTOR (07 downto 0);
carry:out std_logic);
end multiplierr;
architecture Behavioral of multiplierr is
component BITFULLADDER
PORT(A,B,CIN:IN STD_LOGIC;SUM,CARRY:OUT STD_LOGIC);
END component;
signal a,b,c,d,j,k:std_logic_vector(7 downto 0 );
signal c0,c1,c2,c3,c4,c5,c6,c7,c00,c01,c02,c03,c04,c05,c06,c07,c000,c001,c002,c003,c004,c005,c006,c007:std_logic;
begin
process(x,y,a,b,c,d,j,k,c0,c1,c2,c3,c4,c5,c6,c7,c00,c01,c02,c03,c04,c05,c06,c07,c000,c001,c002,c003,c004,c005,c006,c007)
begin
if x(0)='1'
then a<='0000'&y;
else a<='0000'&'0000';
end if;
if x(1)='1'
then b<='000'&y&'0';
else b<='000'&'0000'&'0';
end if;
if x(2)='1'
then c<='00'&y&'00';
else c<='00'&'0000'&'00';
end if;
if x(3)='1'
then d<='0'&y&'000';
else d<='0'&'0000'&'000';
end if;
end process;
j0:BITFULLADDER port map (a(0),b(0),'0',j(0),c0);
j1:BITFULLADDER port map (a(1),b(1),c0,j(1),c1);
j2:BITFULLADDER port map (a(2),b(2),c1,j(2),c2);
j3:BITFULLADDER port map (a(3),b(3),c2,j(3),c3);
j4:BITFULLADDER port map (a(4),b(4),c3,j(4),c4);
j5:BITFULLADDER port map (a(5),b(5),c4,j(5),c5);
j6:BITFULLADDER port map (a(6),b(6),c5,j(6),c6);
j7:BITFULLADDER port map (a(7),b(7),c6,j(7),c7);
k0:BITFULLADDER port map (c(0),d(0),'0',k(0),c00);
k1:BITFULLADDER port map (c(1),d(1),c00,k(1),c01);
k2:BITFULLADDER port map (c(2),d(2),c01,k(2),c02);
k3:BITFULLADDER port map (c(3),d(3),c02,k(3),c03);
k4:BITFULLADDER port map (c(4),d(4),c03,k(4),c04);
k5:BITFULLADDER port map (c(5),d(5),c04,k(5),c05);
k6:BITFULLADDER port map (c(6),d(6),c05,k(6),c06);
k7:BITFULLADDER port map (c(7),d(7),c06,k(7),c07);
z0:BITFULLADDER port map (j(0),k(0),'0',z(0),c000);
z1:BITFULLADDER port map (j(1),k(1),c000,z(1),c001);
z2:BITFULLADDER port map (j(2),k(2),c001,z(2),c002);
z3:BITFULLADDER port map (j(3),k(3),c002,z(3),c003);
z4:BITFULLADDER port map (j(4),k(4),c003,z(4),c004);
z5:BITFULLADDER port map (j(5),k(5),c004,z(5),c005);
z6:BITFULLADDER port map (j(6),k(6),c005,z(6),c006);
z7:BITFULLADDER port map (j(7),k(7),c006,z(7),c007);
carry<= c7 xor c07 xor c007;
end Behavioral;
Aug 20, 2007 The VHDL source code for a serial multiplier, using a shortcut model where a signal acts like a register. 'hi' and 'lo' are registers clocked by the condition mulclk'event and mulclk='1' The VHDL is mulser.vhdl The output of the simulation is mulser.out At the start of multiply: the multiplicand is in 'md', the multiplier is in 'lo' and 'hi. Serial Multiplier (Sequential) Booth Multiplier Combination al Multiplier Wallace Tree Multiplier 1. Optimum Area 110 LUTs 134 LUTs 4 LUTs 16 LUTs 2. Optimum Delay 9 ns 11 ns 9 ns 9 ns 3. Sequential Elements 105 DFFs 103 DFFs - - 4. Input/Output Ports 67 / 71 50 / 49 4 / 4 24 / 18 5. Dadda Multiplier Vhdl Code For Serial Adderinstmank.
4 Bit Multiplier Vhdl
Apr 26, 2020 We will see how to implement the VHDL code for a serial to parallel interface in order to get back the parallel data bus we sent in the transmitter device. In other words, we will implement the VHDL block in the of the bottom right of Figure1. Figure 1 FPGA connection Parallel vs Serial. 8-bit x 8-bit Pipelined Multiplier Briefly interrupting the Built-in Self Test (BIST) theme, this month we present a synthesizable model of an 8-bit x 8-bit pipelined multiplier in Verilog. Although the design is synthesizable as is, a synthesis tool with a re-timing capability is required in order to create a pipelined multiplier with the.