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      題目9:數(shù)據(jù)分配器的VHDL描述(數(shù)據(jù)輸入端一個,輸出端8個)

      提問者:網(wǎng)友 2018-07-19
      最佳回答
      LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; ENTITY select1_8 IS PORT(Q:IN STD_LOGIC_VECTOR(3 DOWNTO 0); sel: IN STD_LOGIC_VECTOR(2 DOWNTO 0); D0,D1,D2,D3,D4,D5,D6,D7:OUT STD_LOGIC_VECTOR(3 DOWNTO 0)); END select1_8; ARCHITECTURE abc OF select1_8 IS BEGIN PROCESS(sel) BEGIN CASE sel IS WHEN "000"=> D0<=Q; WHEN "001"=> D1<=Q; WHEN "010" => D2<=Q; WHEN "011"=> D3<=Q; WHEN "100"=> D4<=Q; WHEN "101" => D5<=Q; WHEN "110"=> D6<=Q; WHEN OTHERS=> D7<=Q; END CASE; END PROCESS; END abc;
      回答者:網(wǎng)友
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