Figure Q7 describes a Linear Feedback Shift Register (LFSR). Draw the equivalent schematic diagram of the system based on an off-the-shelf shift register, clearly showing the number of exclusive-OR gates needed to construct it. LIBRARY ieee; USE ieee.std logic_1164.all; entity lfsr is CLK, RESET: in STD_LOGIC; Q: out STD_LOGIC_VECTOR (5 downto 0) ); port ( end lfsr; architecture behavior of lfsr is begin process (CLK,RESET) begin if RESET='1' then Q <= "000001"; else Q <= ( Q(3) xor Q(2) xor Q(0)) & Q(5 downto 1); end if; end process; end behavior;

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Figure Q7 describes a Linear Feedback Shift Register (LFSR). Draw the
equivalent schematic diagram of the system based on an off-the-shelf shift
register, clearly showing the number of exclusive-OR gates needed to construct
it.
LIBRARY ieee;
USE ieee.std logic_1164.all;
entity lfsr is
CLK, RESET: in STD LOGIC;
Q: out STD LOGIC_VECTOR (5 downto 0) );
port (
end lfsr;
architecture behavior of lfsr is
begin
process (CLK,RESET)
begin
if RESET='1' then
Q <= "000001";
else
Q <= ( Q(3) xor Q(2) xor Q(0) ) & Q(5 downto 1);
end if;
end process;
end behavior;
Transcribed Image Text:Figure Q7 describes a Linear Feedback Shift Register (LFSR). Draw the equivalent schematic diagram of the system based on an off-the-shelf shift register, clearly showing the number of exclusive-OR gates needed to construct it. LIBRARY ieee; USE ieee.std logic_1164.all; entity lfsr is CLK, RESET: in STD LOGIC; Q: out STD LOGIC_VECTOR (5 downto 0) ); port ( end lfsr; architecture behavior of lfsr is begin process (CLK,RESET) begin if RESET='1' then Q <= "000001"; else Q <= ( Q(3) xor Q(2) xor Q(0) ) & Q(5 downto 1); end if; end process; end behavior;
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