AR# 43829


Design Advisory for Virtex-6 FPGA GTH Transceivers - Incorrect RXBUFRESET connections in the wrapper in x4 mode


This answer record explains the correct connections to be made for RXBUFRESET in the HDL wrappers generated bytheVirtex-6 FPGA GTH Transceiver Wizard in ISE Design Suite13.2 and earlier versions when configuring the GTH transceivers in x4 mode (GTHX4LANE=1).



The Virtex-6 FPGA GTH transceivers can be configured in a x4 mode by setting GTHX4LANE to '1', where lanes 0, 1, 2 and 3 form a single x4 link.In this mode, a change in the control settings on the master lane (lane 0) also causes the same effect on the slaves. However, this does not apply to the RXBUFRESETport, so this reset port should be connected individually for all of the four lanes.But, in the module 'v6_gthwizard_v1_8_quad.vhd' or 'v6_gthwizard_v1_8_quad.v',RXBUFRESET for lanes 1/2/3 areincorrectly tied to '0'.


The RXBUFRESET port connections in an x4 mode are currently set as follows when GTHX4LANE=1:

RXBUFRESET0 => rxbufreset0_i,
RXBUFRESET1 => tied_to_ground_i,
RXBUFRESET2 => tied_to_ground_i,
RXBUFRESET3 => tied_to_ground_i,

This should be changed to:

RXBUFRESET0 => rxbufreset0_i,
RXBUFRESET1 =>rxbufreset0_i,
RXBUFRESET2 =>rxbufreset0_i,
RXBUFRESET3 =>rxbufreset0_i,

This isfixed in the HDL wrappers generated by the Virtex-6 FPGA GTH Transceiver Wizard v1.9 inISE design tools version 13.3.



Answer Number 问答标题 问题版本 已解决问题的版本
34565 有关 Virtex-6 FPGA 设计咨询的主要答复记录 N/A N/A


Answer Number 问答标题 问题版本 已解决问题的版本
34565 有关 Virtex-6 FPGA 设计咨询的主要答复记录 N/A N/A
38596 Virtex-6 FPGA GTH Transceiver - Known Issues and Answer Records List N/A N/A
AR# 43829
日期 05/22/2012
状态 Active
Type 设计咨询
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