Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorCYCLONE V OCT Problem
Hi, I am using in my design a Cyclone V device (namely the 5CGXBC3B7U15C8N), while using PIN#M13, N12 as an LVDS RX port. Going through ALTERA device handbook, it has two variations for On Ch...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- The Cyclone V devices provide a 100 Ω, on-chip differential termination option on each differential receiver channel for LVDS standards. On-chip termination saves board space by eliminating the need to add external resistors on the board. You can enable on-chip termination in the Quartus Prime software Assignment Editor. --- Quote End --- By selecting LVDS you will automatically get the termination resistor. However, you can remove this by setting the 'Input Termination' to 'Off', or adding a line to the project's Quartus Settings File (.qsf): --- Quote Start --- set_instance_assignment -name INPUT_TERMINATION OFF -to your_input_signal --- Quote End --- Cheers, Alex
