Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Public
Document Table of Contents

4.9.1. Latency Uncertainty Removal with the Phase Compensation FIFO in Register Mode

To remove the latency uncertainty through the receiver's phase compensation FIFO, the receiver and transmitter phase compensation FIFOs are always set to register mode. In register mode, the phase compensation FIFO acts as a register and thereby removes the uncertainty in latency. The latency through the transmitter and receiver phase compensation FIFO in register mode is one clock cycle.

The following options are available:

  • Single-width mode with 8-bit channel width and 8B/10B encoder enabled or 10-bit channel width with 8B/10B disabled
  • Double-width mode with 16-bit channel width and 8B/10B encoder enabled or 20-bit channel width with 8B/10B disabled