Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Document Table of Contents 8B/10B Decoder in Double-Width Mode

In double-width mode, two 8B/10B decoders are cascaded to decode the 20-bit code groups into two sets of 8-bit data and two 1-bit control identifiers. When receiving the 20-bit code group, the 10-bit LSByte is decoded first and the ending running disparity is forwarded to the other 8B/10B decoder for decoding the 10-bit MSByte.

Figure 31. 8B/10B Decoder Block Diagram in Double-Width Mode