TLK is set to 100M RMII mode. The program works well when set to PCS outout loopback, but when I changed to Digital loopback, it failed. Nothing else is changed in code. what should I check? thanks for help
I tried the External loopback, shorted pin 1&3, 2&6 on the ehternet port, and the program works. I do not why it cannot pas digital loopback.
Another interesting thing is if either one of 1&3, 2&6 shorts is removed, just one pair is shorted, such as 1&3. It still works. I also donot know how could this happen.
