SerialLite II IP Core User Guide

ID 683179
Date 7/13/2021
Public
Document Table of Contents

2.8.14.4. Transceiver Reconfiguration Block

When you use an Arria® II GX, Arria® V, Intel® Arria® 10, Cyclone® V, Stratix® IV, or a Stratix® V device, you can instantiate a transceiver reconfiguration block.
The transceiver reconfiguration block dynamically changes the following physical media attachment (PMA) settings:
  • Pre-emphasis
  • Equalization
  • VOD
  • Offset cancellation
Note: For analog settings, there are no restrictions on using dynamic reconfiguration.

When you use a transceiver-based device, the ALTGX interface allows you to modify the parameter interface with a reconfiguration block. The altgx_reconfig block is not instantiated, but the Quartus-generated wrapper provides the ports that interface to the altgx_reconfig block.

If you choose to use an altgx_reconfig block, you must instantiate the altgx_reconfig block and connect the associated signals to the corresponding SerialLite II IP core top-level signals (tie the reconfig_fromgxb, reconfig_clk, and reconfig_togxb ports to the altgx_reconfig block).

Note: For Intel® Arria® 10, Arria® II GX, and Stratix® IV devices, you must instantiate the transceiver reconfiguration block on the devices, because these device transceivers require offset cancellation. Your Arria® II GX or Stratix® IV design can compile without the dynamic reconfiguration block but it cannot function correctly in hardware. For Arria® V, Cyclone® V, and Stratix® V devices, you need to include a dynamic reconfiguration block for the offset cancellation to occur.