01-18-2016 02:44 AM
I am using GT wizard example. Here I modified the exdes.v code, after modifing the code TX/RX are no longer remaining differential pair. And also I'm unable to assign to their I/0 ports. Where am I going wrong?
And also I couldn't able to assign TX_polarity port to push buttons.
Here I have attached my exdes.v file and snapshot.
Check lines 86-89 and 306-322.
01-18-2016 02:48 AM
01-25-2016 04:52 AM
I understood that, we can not use the GTX/mgt pins of the Transceiver as GPIO.
Can I connect the txp/txn to rxp/rxn pins for loopback for production quality testing ? is there any design restriction?
01-25-2016 08:51 AM
01-25-2016 09:52 AM
Yes it it possible to do external cable loopback to connect txp ->rxp and txn -> rxn
Refer Loopback section below doc for Transceiver internal loopback options