We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 51403

Virtex-7 GTH Transceivers: CAUI 8-byte FPGA TX interface not supported in Engineering Sample (ES) Silicon


In the Virtex-7 GTH Initial ES/General ES silicon, the CAUI TX interface (64B/66B or 64B/67B Encoding with GEARBOX_MODE[2] = 1b1) does not support the 8-byte FPGA TX interface with 4-byte internal data width (TX_DATA_WIDTH = 64and TX_INT_DATAWIDTH = 1).


The 4-byte FPGA TX interface with 4-byte internal data width and CAUI RX interfaces are not affected by this and they are supported.
The CAUI TX 8-byte interface with 4-byte internal data width is expected to be supported in Production GTH silicon. 
AR# 51403
Date Created 08/21/2012
Last Updated 12/09/2014
Status Active
Type General Article
  • Virtex-7