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  3. AR# 35000: Design Assistant for PCI Express - What happens if the power if the FPGA is re-configured, power is removed, or card removed during normal operation of the link

AR# 35000

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Design Assistant for PCI Express - What happens if the power if the FPGA is re-configured, power is removed, or card removed during normal operation of the link

描述

This answer record contains the details for removing the power from an Endpoint or re-configuring the device and its affects.

Note: This Answer Record is a part of the Xilinx Solution Center for PCI Express. 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 forPCIe to guide you to the right information.

解决方案

If power is removed from the FPGA without going through the proper power down procedure, it could cause a system crash or hang. This is due to the fact that the host may have outstanding read requests sent to the endpoint and if the endpoint does not respond, it will cause a completion timeout to occur described in (Xilinx Answer 35034). If power is applied again, most systems will link train again, but will not enumerate and configure the endpoint. A reset would be required.

Similar problems could occur if the FPGA is reconfigured, but the system is not reset. See (Xilinx Answer 34871).

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
35034 Design Assistant for PCI Express - Completion Timeouts Cause the System to Freeze N/A N/A
35033 Design Assistant for PCI Express - Device is recognized by system, but problems occur N/A N/A
34871 Design Assistant for PCI Express - Using JTAG to Configure the Device N/A N/A
34538 Xilinx Solution Center for PCI Express - Design Assistant N/A N/A
AR# 35000
日期 12/15/2012
状态 Active
Type 综合文章
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