ТЕМА: вопросы по UFM Block MAXII "марсоход"

reg [15:0]data;
reg [15:0]OUTR;
reg EndCyc, As;

wire [16:0]preload = {9'b111111111,~As,7'b1111110};

 ufm ufm0(
	.arclk(osc),
	.arclkena(1'b1),
	.ardin(1'b0),
	.arshft(As),
	.drclkena(1'b1),
	.drclk(osc),
	.drdin(1'b0),
	.drshft(EndCyc),
	.erase(1'b0),
	.oscena(1'b1),
	.program(1'b0),
	.busy(busy),
	.drdout(serial_data),
	.osc(osc),
	.rtpbusy(rtpbusy)
);

wire [16:0]SD = (EndCyc==1'b0)? preload[16:0] : {data[15:0],serial_data};
assign oscled = (chkey)? OUTR[15:8] : OUTR[7:0];

always@(posedge osc or negedge reset) begin
 if(!reset) begin
   data <= 16'hFFFF;
   EndCyc <= 1'b0;
   As <= 1'b1;
 end
 else begin
   {EndCyc, data[15:0]} <= SD[16:0];
   if(As) As <= data[15];
   if(!EndCyc) OUTR <= data;
 end
end