简单的JK触发器LIBRARYIEEE;USEIEEESTD_LOGIC_1164ALL;ENTITYJKff_1ISPORT(J,K:INSTD_LOGIC;clk:INstd_logic;Q:
半加器1LIBRARYIEEE;USEIEEESTD_LOGIC_1164ALL;ENTITYhalfadderISPORT(A,B:INSTD_LOGIC;Co:outSTD_LOGIC;S:out
1。用CASE语句LIBRARYIEEE;USEIEEESTD_LOGIC_1164ALL;ENTITYLS138ISPORT(S:inSTD_LOGIC_vector(2downto0);Y:out
