ENTITY o2_x2 IS GENERIC ( CONSTANT area : NATURAL := 1250; CONSTANT cin_i0 : NATURAL := 10; CONSTANT cin_i1 : NATURAL := 10; CONSTANT rdown_i0_q : NATURAL := 1620; CONSTANT rdown_i1_q : NATURAL := 1620; CONSTANT rup_i0_q : NATURAL := 1790; CONSTANT rup_i1_q : NATURAL := 1790; CONSTANT tpll_i0_q : NATURAL := 310; CONSTANT tphh_i1_q : NATURAL := 335; CONSTANT tpll_i1_q : NATURAL := 364; CONSTANT tphh_i0_q : NATURAL := 406; CONSTANT transistors : NATURAL := 6 ); PORT ( i0 : in BIT; i1 : in BIT; q : out BIT; vdd : in BIT; vss : in BIT ); END o2_x2; ARCHITECTURE behaviour_data_flow OF o2_x2 IS BEGIN ASSERT ((vdd and not (vss)) = '1') REPORT "power supply is missing on o2_x2" SEVERITY WARNING; q <= (i0 or i1) after 1000 ps; END;