LVDS TX as LVDS receiver in Cyclone V

[Altera_Forum]

Hello, In a new design I have to interface a few 8-channels ADCs to a Cyclone V GX C9F31.The ADCs use LVDS signaling at 240 MHz DDR. 

In a previous design I've used Cyclone IV and any LVDS pair could be used for either output (true or emulated LVDS) or input.  Now for Cyclone V my understanding is that only the LVDS_RX can be used as receivers.  It this really the case?  Quartus II (13.1) fitter complains if I try to assign an input with LDVS io-standard to a LVDS_TX pair.  The Cyclone V handbook mention that the other way around is possible (use a RX pair as emulated TX) but no word for my case.   Many Thanks in advance

[Altera_Forum]

Yes, this really is the case. You will not be able to drive a differential signal into a DIFFIO_TX_xxx channel. Differential input signals will have to go into DIFFIO_RX_xxx pins. 

 Note: emulated LVDS does allow DIFFIO_RX_xxx pins to be driven.

[Altera_Forum]

Thanks for the information.  

I'll have to use more banks for the ADC readout. Nice to have deserializer in hardware thou.  As a comment, It would be helpful to have a list of the new features/limitations with respect to the previous device in the family (e.g. EPC5 vs. EPC4) in the Handbook.