Hi all. I have a problem with clock correction(CC) in GTP Transciever(transmitting data between two FPGA's). I have two bytes interface without 8b/10b coding. For example i always send X"5555" and set clock correction sequence as 1 byte X"55" in wizard. But RXCLKCORCNT always "000". But when i set "Don't care" on CC seq - CC work correctly! I'v tried X"AA" CC sequence - it does not work too, so i have RX buffer underflow sometimes. As I understand, I have wrongly specified CC sequence, but i can't understand where i have mistaken.
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Alexander Lutovid wrote: > For example i always send X"5555" and set clock correction sequence as 1 > byte X"55" in wizard. But RXCLKCORCNT always "000". > But when i set "Don't care" on CC seq - CC work correctly! In simulation or in hardware?
Duke Scarring wrote: > Alexander Lutovid wrote: >> For example i always send X"5555" and set clock correction sequence as 1 >> byte X"55" in wizard. But RXCLKCORCNT always "000". >> But when i set "Don't care" on CC seq - CC work correctly! > In simulation or in hardware? In hardware between 2 FPGA's. In simulation i haven't detect this problem; When i connect RX to TX(physically) on one board it also works correctly.(Because it does not need CC)
It works) When i set RX_DECODE_SEQ_MATCH_0 False But i have one question: If i use 16 bit interface how i can use 8 bit(or 16) CC sequence( CLK_COR_SEQ_1_1_0 - 10 bit)? otherwise byte alignment will be lost(my block, using RXSLIDE)