module_c.v

Xilinx ISE 官方源代码盘第八章

module module_c (CLK_TOP,TOP2A_C_IN,B2C_IN,A2C_IN,
		MODC_DATA,MODC_CLK,MODC_OUT,
		C2TOP_OUT,C2AND2_OUT,C2A_OUT); 

input CLK_TOP ; 
input B2C_IN ; 
input TOP2A_C_IN ; 
input A2C_IN ; 
input MODC_DATA, MODC_CLK; 
output MODC_OUT; 
output C2AND2_OUT ; 
output C2A_OUT ; 
output C2TOP_OUT ; 
// add your declarations here 
reg Q0_OUT, Q1_OUT, Q2_OUT, Q3_OUT ; 
reg C2AND2_OUT, C2A_OUT, C2TOP_OUT ; 
reg MODC_OUT; 
wire AND4_OUT ; 
wire OR4_OUT ; 
// add your code here 
assign AND4_OUT = Q0_OUT && Q1_OUT && Q2_OUT && Q3_OUT ; 
assign OR4_OUT = Q0_OUT || Q1_OUT || Q2_OUT || Q3_OUT ; 
always @ (posedge CLK_TOP) 
begin : TOP_CLK 
  Q0_OUT <= MODC_DATA ; 
  Q2_OUT <= TOP2A_C_IN ; 
  MODC_OUT <= OR4_OUT ; 
  C2AND2_OUT <= AND4_OUT ; 
end 
always @ (posedge MODC_CLK) 
begin : CLK_MODA 
  Q1_OUT <= B2C_IN ; 
  Q3_OUT <= A2C_IN ; 
  C2A_OUT <= AND4_OUT ; 
  C2TOP_OUT <= OR4_OUT ; 
end 
endmodule