Altera Stratix GX Transceiver - Manual (Page 195)

Altera Corporation 6–41
January 2005 Stratix GX Transceiver User Guide
GigE Mode
begin
reset<=1;
txctrl<=0;
txdata<=datacntr;
end
`donothing: //sends out /D0.0/
begin
reset<=0;
txctrl<=0;
txdata<=8'h00;
end
`sync: //sends alternating /K28.5/ and /D31.7/
begin
reset<=0;
if (globalcntr[0]==1)
begin
txdata<=8'hbc;
txctrl<=1;
end
else
begin
txdata<=8'hff;
txctrl<=0;
end
end
`tx_err: //sends an out of bounds control code
/K31.7/
begin
reset<=0;
txctrl<=1;
txdata<=8'hff;
end
`count: //sends out value of a counter
begin
reset<=0;
txctrl<=0;
txdata<=datacntr;
end
`txk: //sends out all 12 K codes
begin
reset<=0;
txctrl<=1;
txdata<=kdata;
end
default:
begin
reset<=0;
txctrl<=0;
txdata<=datacntr;
end
endcase
endmodule