ENTITY na2_x4 IS GENERIC ( CONSTANT area : NATURAL := 1750; CONSTANT cin_i0 : NATURAL := 10; CONSTANT cin_i1 : NATURAL := 10; CONSTANT rdown_i0_nq : NATURAL := 810; CONSTANT rdown_i1_nq : NATURAL := 810; CONSTANT rup_i0_nq : NATURAL := 890; CONSTANT rup_i1_nq : NATURAL := 890; CONSTANT tphl_i1_nq : NATURAL := 353; CONSTANT tphl_i0_nq : NATURAL := 412; CONSTANT tplh_i0_nq : NATURAL := 552; CONSTANT tplh_i1_nq : NATURAL := 601; CONSTANT transistors : NATURAL := 10 ); PORT ( i0 : in BIT; i1 : in BIT; nq : out BIT; vdd : in BIT; vss : in BIT ); END na2_x4; ARCHITECTURE behaviour_data_flow OF na2_x4 IS BEGIN ASSERT ((vdd and not (vss)) = '1') REPORT "power supply is missing on na2_x4" SEVERITY WARNING; nq <= not ((i0 and i1)) after 1200 ps; END;