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AR# 55849

LogiCORE IP Aurora 64B66B v8.0 and earlier - Update to RX termination for 7 Series GTH


If using the Aurora 64B66B core v8.0 and earlier to target Virtex-7 devices with GTH transceivers, the RX termination is set to AVTT or GND while the latest recommendation in the GTP and GTH transceiver User Guides is to set the RX termination to 800mV. If using the GTX transceiver, the termination is already set to 800mV.


To change the RX termination to 800mV for Virtex-7 FPGA GTH transceiver:

  • in the core_name_gtx.v/vhd file, change to use the following settings:
    RX_CM_SEL [1:0] = 2'b11
    RX_CM_TRIM = 4'b1010

Linked Answer Records

Master Answer Records

AR# 55849
Date 05/03/2013
Status Active
Type General Article
  • Virtex-7 HT
  • Aurora 64B/66B
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