read data from SSRAM (IS61LPS25636A)) on Cyclone III starter board

Anybody know how to read data from SSRAM (IS61LPS25636A)) on Cyclone III starter board? I followed the datasheet, but still could not read the data correctly. My code is as follows

`timescale 1ns / 1ps

module mem_read(

ssram_clk,

clk,

reset_n,

ssram_adsc_n,

ssram_bw_n,

ssram_bwe_n,

ssram_ce_n,

flash_ssram_a,

flash_ssram_d,

ssram_oe_n,

test_led

);

input ssram_clk;

input clk;

input reset_n;

output wire ssram_adsc_n;

output wire [3:0] ssram_bw_n;

output wire ssram_bwe_n;

output wire ssram_ce_n;

output wire [19:2] flash_ssram_a;

input [31: 0] flash_ssram_d;

output reg ssram_oe_n;

output wire [3:0] test_led;

assign ssram_adsc_n=1'b1;

assign ssram_bw_n=4'b1111;

assign ssram_bwe_n=1'b1;

assign ssram_ce_n=1'b0;

// assign flash_ssram_a=counter1;

// assign ssram_oe_n=1'b0;

reg [1:0] counter;

always@(posedge ssram_clk, posedge reset_n)

begin

if (reset_n)

counter <=2'b00;

else if (counter1==18'b111111111111111111)

counter <=2'b00;

else if (counter==2'b11)

counter <=2'b01;

else

counter <= counter + 2'b1;

end

//counter

reg [17:0] counter1;

always@(posedge clk, posedge reset_n)

begin

if (reset_n)

begin

counter1 <= 18'b111111111111111111;

end

else if (counter1==18'b111111111111111111)

counter1<=18'b000000000000000000;

else

begin

counter1<=counter1+18'b1;

end

end

assign test_led[0]=reset_n;

assign flash_ssram_a =counter1;

always @(negedge ssram_clk, posedge reset_n)

begin

if (reset_n)

begin

ssram_oe_n <=1'b1;

end

else if (counter1==18'b111111111111111111)

begin

ssram_oe_n <=1'b1;

end

else if (counter==2'b01||counter==2'b11)

begin

ssram_oe_n <= 1'b1;

end

else if (counter==2'b10)

begin

ssram_oe_n <= 1'b0;

end

else

;

end

endmodule