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tcuong141
Observer
Observer
3,007 Views
Registered: ‎02-24-2016

GTY transceiver : RX CDR Lock to Reference

Hi all,

 

I have generated a transceiver OC48(STM16) to use for OC3(STM1).

I have configured CDR is lock to reference. (set RXCDRHOLD = 1’b1 and RXCDROVRDEN = 1’b0).

 

The data is captured at output at RX side of transceiver was wrong, sometime I got a right value as below.

 

Do I miss any option of setting Lock to Reference mode ?

I am using xcvu9p-flgb2104-2L-e-es1 and Vivado 16.4

 

P/S : When I changed the transceiver to Lock to Data and I transmitted OC48 framer, the monitor of OC48 framer was good, free error.

 

Thanks all

 

Wrong data :

 

Address                  16bits data

00FAA7BC: FFFF   FFF8   0C73   1E77
00FAA7C0: FFF8   1CC7   FFFF   FFF8
00FAA7C4: 7247   FFF8   39C7   FFF8
00FAA7C8: 39CF   399F   FFF8   49E6
00FAA7CC: 79CE   F9CF   FFFF   FFF8
00FAA7D0: 39D7   FFFF   FFFF   FFFF

================================

Right data

 

Address                   16bits  data
00FAA400: 8000   7FFF   8000   7FFF
00FAA404: 8000   0000   7FFF   8000
00FAA408: 0000   0000   0000   0000
00FAA40C: 7FFF   8000   0000   0000
00FAA410: 0000   7FFF   8000   7FFF
00FAA414: FFFF   8000   7FFF   FFFF
00FAA418: FFFF   8000   7FFF   8000

 

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1 Reply
tcuong141
Observer
Observer
2,696 Views
Registered: ‎02-24-2016

Hi all,

 

I have tried using CDR as Lock-to-Data and the data path has been good.

OC3 framer can work well when SERDES is OC48 rate.

 

 

Regards

 

 

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