Cyclone V Device Handbook: Volume 2: Transceivers

ID 683586
Date 10/24/2018
Document Table of Contents Bit Reversal

You can reverse the transmission bit order to achieve MSB-to-LSB ordering using the bit reversal feature at the transmitter.
Table 3.  Bit Reversal Feature
Transmission Bit Order
Bit Reversal Option 8- or 10-bit Serialization Factor 16- or 20-bit Serialization Factor
Disabled (default) LSB to MSB LSB to MSB
Enabled MSB to LSB

For example:

8-bit—D[7:0] rewired to D[0:7]

10-bit—D[9:0] rewired to D[0:9]


For example:

16-bit—D[15:0] rewired to D[0:15]

20-bit—D[19:0] rewired to D[0:19]