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  3. AR# 34873: Design Assistant for PCI Express - Debugging System Recognition and Link Training Issues Using trn_lnk_up_n and trn_reset_n

AR# 34873

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Design Assistant for PCI Express - Debugging System Recognition and Link Training Issues Using trn_lnk_up_n and trn_reset_n

描述


This Answer Record discusses how to use trn_reset_n and trn_lnk_up_n to debug device recognition and link trainingproblems.
NOTE: This Answer Record is part of the Xilinx Solution Center for PCI Express (Xilinx Answer 34536) The Xilinx Solution Center for PCI Express is available to address all questions related to PCIe. Whether you are starting a new design with PCIe or troubleshooting a problem, use the Solution Center for PCIe to guide you to the right information.

解决方案


The signal trn_reset_n indicates the reset sequence is complete and assertion of trn_lnk_up_n indicates the link is trained.
The signal trn_reset_n must deassert(go tologic 1)before the link can train; see (Xilinx Answer 34894) for reasons why trn_reset_n might not deassert.
If trn_reset_n deasserts properly, but trn_lnk_up_n does not assert, see (Xilinx Answer 36137) />
Revision History
08/13/2010 - Initial Release

链接问答记录

相关答复记录

Answer Number 问答标题 问题版本 已解决问题的版本
36137 Design Assistant for PCI Express - trn_reset_n (user_reset_out for AXI) is deasserting, but trn_lnk_up_n (user_lnk_up_n for AXI) is not asserting N/A N/A
34894 Design Assistant for PCI Express - Using trn_reset_n to debug link training issues N/A N/A
34777 Design Assistant for PCI Express - Device not recognized by system N/A N/A
34538 Xilinx Solution Center for PCI Express - Design Assistant N/A N/A
AR# 34873
日期 12/15/2012
状态 Active
Type 综合文章
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