当通过碰撞或ChipScope正确识别JTAG电缆，但未正确读回设备ID代码时，这表明JTAG不正确。
假设您使用的电路板是Xilinx XUPV5-LX110T电路板，那么基本的JTAG链是正确的。
JTAG链中有一个选项可绕过/不绕过JTAG标头。
检查跳线J21的状态以确保您的设置正确。
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如果没有，你应该在发布之前。太多结果？
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以上来自于谷歌翻译
以下为原文
When the JTAG cable is correctly recognized by impact or ChipScope, but the device idcodes are not correctly read back then that is a strong indication that the JTAG is incorrect.
Assuming that the board that you are using is the Xilinx XUPV5-LX110T board, the basic JTAG chain is correct. There is an option in the JTAG chain to bypass/not bypass the JTAG header. Check the state of jumper J21 to ensure that is correct for your setup.
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Too many results? Try adding site:www.xilinx.com
当通过碰撞或ChipScope正确识别JTAG电缆，但未正确读回设备ID代码时，这表明JTAG不正确。
假设您使用的电路板是Xilinx XUPV5-LX110T电路板，那么基本的JTAG链是正确的。
JTAG链中有一个选项可绕过/不绕过JTAG标头。
检查跳线J21的状态以确保您的设置正确。
------您是否尝试在Google中输入问题？
如果没有，你应该在发布之前。太多结果？
尝试添加网站：www.xilinx.com
以上来自于谷歌翻译
以下为原文
When the JTAG cable is correctly recognized by impact or ChipScope, but the device idcodes are not correctly read back then that is a strong indication that the JTAG is incorrect.
Assuming that the board that you are using is the Xilinx XUPV5-LX110T board, the basic JTAG chain is correct. There is an option in the JTAG chain to bypass/not bypass the JTAG header. Check the state of jumper J21 to ensure that is correct for your setup.
------Have you tried typing your question into Google? If not you should before posting.
Too many results? Try adding site:www.xilinx.com
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