Enabling 8B/10B Mode - Xilinx Virtex-6 FPGA User Manual

Enabling 8B/10B Mode

Follow these steps to enable the 8B/10B mode in the GTH transmitter:
1.
2.
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•
The 8B/10B table includes special characters (K characters) that are often used for control
functions. To transmit TXDATA as a K character instead of regular data, the TXCTRL port
must be driven High.
Virtex-6 FPGA GTH Transceivers User Guide
UG371 (v2.0) February 16, 2010
Set PCS_MODE_LANE<n>[3:0] to 4'b0111.
Set PCS_RESET_LANE<n> to 0xFC5B.
Set PCS_RESET_1_LANE<n>[1:0] to 2'b00.
Set TX_FABRIC_WIDTH<n> to either "16", "32", or "64" depending on the
application.
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TX 8B/10B Block
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