New Member
Super ContributorHi,
Agilex 5 065B SoM has fixed 1.2 V supplied to Bank 2A. The same power supply rail is also supplying other 1.2 V loads and can't be changed on the module.
Original LVDS spec (TIA 644, IEEE Std 1596.3) have rather tight Vocm spec of 1.25 V +/- 10% (1.125 to 1.375 V). It's not achieved by TDS 1.3V IO-standard with Vocm range of 0.9 to 1.1 V. To meet LVDS Vocm spec strictly in a 1.2 V supplied bank, you'd need a resistor network with external voltage offset.
Most LVDS receivers have however much wider Vicm range than required by the standard, respectively they can tolerate deviating driver Vocm. Possible range also depends on data rates, see as an example Cyclone 10 GX LVDS receiver spec.
I'm quite sure that TDS 1.3 V IO-standard won't fail if the bank is actually supplied, Vocm will be respectively lower but still accepted by most LVDS receivers.
If it's an acceptable solution for your project depends on many prerequisites that we don't know.
Regards
Frank
