SRL16_1.v
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// $Header: /root/leakn64/depot/rf/hw/debug/xilinx/SRL16_1.v,v 1.1 2003/04/01 21:47:36 berndt Exp $
/*
FUNCTION : 16 bit Shift Register LUT with Negative_edge Clock
and Clock Enable
*/
`timescale 100 ps / 10 ps
module SRL16_1 (Q, A0, A1, A2, A3, CLK, D);
parameter INIT = 16'h0000;
output Q;
input A0, A1, A2, A3, CLK, D;
reg [5:0] count;
reg [15:0] data;
wire [3:0] addr;
wire clk_;
wire q_int;
buf b_a3 (addr[3], A3);
buf b_a2 (addr[2], A2);
buf b_a1 (addr[1], A1);
buf b_a0 (addr[0], A0);
buf b_q_int (q_int, data[addr]);
buf b_q (Q, q_int);
not i_c (clk_, CLK);
initial
begin
while (CLK === 1'bx)
#2;
for (count = 0; count < 16; count = count + 1)
data[count] <= INIT[count];
end
always @(posedge clk_)
begin
{data[15:0]} <= {data[14:0], D};
end
specify
(CLK => Q) = (1, 1);
endspecify
endmodule