Cyclone V Device Handbook: Volume 2: Transceivers

ID 683586
Date 10/24/2018
Document Table of Contents Byte Serializer in Double-Width Mode

The operation in double-width mode is similar to that of single-width mode. For example, in double-width mode with a channel width of 32 bits, the byte serializer forwards tx_parallel_data[15:0] first, followed by tx_parallel_data[31:16].

Table 13.  Input and Output Data Width of the Byte Serializer in Double-Width Mode for Cyclone V Devices
Mode Input Data Width to the Byte Serializer Output Data Width from the Byte Serializer Byte Serializer Output Ordering
Double-width 32 16 Least significant 16 bits of the 32-bit output first
40 20 Least significant 20 bits of the 40-bit output first

If you select the 8B/10B Encoder option, the 8B/10B encoder uses the output from the byte serializer. Otherwise, the byte serializer output is forwarded to the serializer.