Arria 10 XVCR oversampling 155Mbps CDR setting

Hi Dlim,

​

Custome have used CDR automatic mode to lock to data and used the recovery clock to process the received data according to SDH protocol. But the Loss of LTD signal often occurs because of the long list of zero on receiver.

After the long zero appear on receiver pin, the pcs parallel rx data is wrong data and then CDR has changed from LTD to LTR mode. After the normal data jump appear on receiver pin, the CDR has changed from LTR to LTD mode and then the pcs parallel rx data receive normal data.

​Between the period of long zero appear on receive chain, customer could not get correct data on PCS parallel_rx_data, please suggest how to deal with this problem? Thanks.

Best Regards

Penn Tan

​