Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

LVDS_DIRECT_LOOPBACK_MODE - need more detail on what "adjacent pair" means

I am looking into using the setting LVDS_DIRECT_LOOPBACK_MODE for a current design project but I am confused by this sentence in the description: "When this feature is enabled, data coming in from t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Hi,

You are right, the loopback mode is used for true differential LVDS pins debugging. By looping data directly from RX to TX, this can help to check if the bit error observed in the FPGA is actually due to incoming signal issue from the other source.