1.3.1.2 8b10b Data Path Interface

An 8b10b lane data path has the following interfaces:

  • Fabric interface – a data path interface with soft-logic
  • Internal clocks and resets interface
  • PMA interface
    • Parallel transmit data to the serializer
    • Parallel receive data from the de-serializer
  • Tx and Rx Fly-wheel FIFO (FWF)
  • System registers interface – controlling modes and options

The following figure shows an overview of the 8b10b data path within the 8b10b lane. The figure does not show specific 8b10b functional blocks (that is, encoder, aligner, decoder, and so on). The diagram is intended to show the relative data and clock paths from the serial to fabric interface and vice-versa.

The fabric TX_DATA and RX_DATA ports are allocated to pin functions as described in the Table 1-6. In addition to the fabric data pins, there are additional signals described in 8b10b port list (Table 1-6). on the fabric interface for 8B10B mode.

Figure 1-15. 8b10b Data Path