AD9516-1使用问题

各位大神 AD9516-1输出时钟设置是100M可是实际输出是97.8M LD始终为低 寄存器操作如下：

case(address_cnt)
7'd0: begin
instruction_header<=16'h0000;

register_data<=8'b00111100;   
end
7'd1: begin
instruction_header<=16'h0000;
register_data<=8'b00011000;
end
7'd2: begin
instruction_header<=16'h0001;

register_data<=8'b00000000;

end
           
7'd3: begin


instruction_header<=16'h0002;
register_data<=8'b00010000;
end
7'd4: begin
instruction_header<=16'h0003;
               
register_data<=8'b01000001;
         
end
7'd5: begin
instruction_header<=16'h0004;
register_data<=8'b00000000;
end
7'd6: begin
instruction_header<=16'h0010;
register_data<=8'b01111100;
end
7'd7: begin
instruction_header<=16'h0011;
register_data<=8'b00000001;
end
7'd8: begin
instruction_header<=16'h0012;
register_data<=8'b00000000;
end
7'd9: begin
instruction_header<=16'h0013;
register_data<=8'b00000101;
//register_data<=8'b00000000;
end
7'd10: begin
instruction_header<=16'h0014;
register_data<=8'b00010000;
end
7'd11: begin
instruction_header<=16'h0015;
register_data<=8'b00000000;
end
7'd12: begin
instruction_header<=16'h0016;
register_data<=8'b00000101;
end
7'd13: begin
instruction_header<=16'h0017;
register_data<=8'b00000000;
end
7'd14: begin
instruction_header<=16'h0019;
register_data<=8'b00000000;
end
7'd15: begin
instruction_header<=16'h001A;
register_data<=8'b00000000;
end
7'd16: begin
instruction_header<=16'h001B;
register_data<=8'b00000000;
end
7'd17: begin
instruction_header<=16'h001C;
register_data<=8'b00000001;
end
7'd18: begin
instruction_header<=16'h001D;
register_data<=8'b00000000;
end
7'd19: begin
instruction_header<=16'h001E;
register_data<=8'b00000000;
end
7'd20: begin
instruction_header<=16'h001F;
register_data<=8'b00001110;
end
7'd21: begin
instruction_header<=16'h00A0;
register_data<=8'b00000001;
end
7'd22:begin
instruction_header<=16'h00A1;
register_data<=8'b00000000;
end
7'd23:begin
instruction_header<=16'h00A2;
register_data<=8'b00000000;
end
7'd24:begin
instruction_header<=16'h00A3;
register_data<=8'b00000001;
end
7'd25:begin
instruction_header<=16'h00A4;
register_data<=8'b00000000;
end
7'd26:begin
instruction_header<=16'h00A5;
register_data<=8'b00000000;
end
7'd27:begin
instruction_header<=16'h00A6;
register_data<=8'b00000001;
end
7'd28:begin
instruction_header<=16'h00A7;
register_data<=8'b00000000;
end
7'd29:begin
instruction_header<=16'h00A8;
register_data<=8'b00000000;
end
7'd30:begin
instruction_header<=16'h00A9;
register_data<=8'b00000001;
end
7'd31:begin
instruction_header<=16'h00AA;
register_data<=8'b00000000;
end
7'd32:begin
instruction_header<=16'h00AB;
register_data<=8'b00000000;
end
7'd33:begin
instruction_header<=16'h00F0;
register_data<=8'b00001011;
end
7'd34:begin
instruction_header<=16'h00F1;
register_data<=8'b00001010;
end
7'd35:begin
instruction_header<=16'h00F2;
register_data<=8'b00001011;
end
7'd36:begin
instruction_header<=16'h00F3;
register_data<=8'b00001010;
end
7'd37:begin
instruction_header<=16'h00F4;
register_data<=8'b00001011;
end
7'd38:begin
instruction_header<=16'h00F5;
register_data<=8'b00001010;
end
7'd39:begin
instruction_header<=16'h0140;
register_data<=8'b01000010;
end
7'd40:begin
instruction_header<=16'h0141;
register_data<=8'b01000011;
end
7'd41:begin
instruction_header<=16'h0142;
register_data<=8'b01000010;
end
7'd42:begin
instruction_header<=16'h0143;
register_data<=8'b01000011;
end
7'd43:begin
instruction_header<=16'h0190;
register_data<=8'b00000000;
end
7'd44:begin
instruction_header<=16'h0191;
register_data<=8'b10000000;
end
7'd45:begin
instruction_header<=16'h0192;
register_data<=8'b00000000;
end
7'd46:begin
instruction_header<=16'h0193;
register_data<=8'b10111011;
end
7'd47:begin
instruction_header<=16'h0194;
register_data<=8'b10000000;
end
7'd48:begin
instruction_header<=16'h0195;
register_data<=8'b00000000;
end
7'd49:begin
instruction_header<=16'h0196;
register_data<=8'b00000000;
end
7'd50:begin
instruction_header<=16'h0197;
register_data<=8'b10000000;
end
7'd51:begin
instruction_header<=16'h0198;
register_data<=8'b00000000;
end
7'd52:begin
instruction_header<=16'h0199;
register_data<=8'b00100010;
end
7'd53:begin
instruction_header<=16'h019A;
register_data<=8'b00000000;
end
7'd54:begin
instruction_header<=16'h019B;
register_data<=8'b00000000;
end
7'd55:begin
instruction_header<=16'h019C;
register_data<=8'b00000000;
end
7'd56:begin
instruction_header<=16'h019D;
register_data<=8'b00000000;
end
7'd57:begin
instruction_header<=16'h019E;
register_data<=8'b00100010;
end
7'd58:begin
instruction_header<=16'h019F;
register_data<=8'b00000000;
end
7'd59:begin
instruction_header<=16'h01A0;
register_data<=8'b00010001;
end
7'd60:begin
instruction_header<=16'h01A1;
register_data<=8'b00100000;
end
7'd61:begin
instruction_header<=16'h01A2;
register_data<=8'b00000000;
end
7'd62:begin
instruction_header<=16'h01A3;
register_data<=8'b00000000;
end
7'd63:begin
instruction_header<=16'h01E0;
register_data<=8'b00000000;
end
7'd64:begin
instruction_header<=16'h01E1;
register_data<=8'b00000010;
end
7'd65:begin
instruction_header<=16'h0230;
register_data<=8'b00000000;
end
7'd66:begin
instruction_header<=16'h0231;
register_data<=8'b00000000;
end
7'd67:begin
instruction_header<=16'h0232;
register_data<=8'b00000001;
end
7'd68: begin
instruction_header<=16'h0018;
register_data<=8'b00000110;
end
7'd69:begin
instruction_header<=16'h0232;
register_data<=8'b00000001;
end
7'd70: begin
instruction_header<=16'h0018;
register_data<=8'b00000111;
end
7'd71:begin
instruction_header<=16'h0232;
register_data<=8'b00000001;
flag <=1'b1;
end
  default:begin
instruction_header<=16'hxxxx;
register_data<=8'bx;
end

endcase


SPI仿真图

各路大神跪求帮忙啊

  不知道9517 和  9516有什么区别，我用过9517，上电必须先复位一下，然后按照手册配置完成后，就可以输出了