How do I use the ALTLVDS_RX megafunction with 12-bit or 14-bit ADC devices?

Description

The ALTLVDS_RX megafunction supports de-serialization factors of up to 10 for dedicated SERDES.  It is possible to connect with a 12-bit device by setting the deserialization factor as x6 and reconstruct the 12-bit word using two consecutive 6-bit words on the parallel interface.

For a 14-bit ADC device, set the ALTLVDS_RX megafunction in x7 mode and reconstruct the 14-bit word using two consecutive 7-bit words on the parallel interface.