[求助]请教关于slow Slow down the cable speed in iMPACT iMPACT, cable, speed, Slow, slow

haideshaides

我遇到了这个问题：

Answer Record # 21504: 7.1i iMPACT - I receive "ERROR iMPACT 477 - The bsdl for the device 'UNKNOWN' is out of date" when trying to initialize the JTAG chain in iMPACT

按照xilinx网站上说的

 – Slow down the cable speed in iMPACT–>Output–>Cable Setup.

 

Slowing down the cable speed reduces the interference of noise on the board and can resolve Signal Integrity issues. If this resolves the problem, the termination schemes on the JTAG lines must be addressed. 

这里是链接，http://survey.xilinx.com/ss/wsb.dll

但是我的cable setup 只能选择LTP1这一个，而且没有选择速度的选项

求助，谢谢！

 

Slowing down the cable speed reduces the interference of noise on the board and can resolve Signal Integrity issues. If this resolves the problem, the termination schemes on the JTAG lines must be addressed. 

这里是链接，http://survey.xilinx.com/ss/wsb.dll

但是我的cable setup 只能选择LTP1这一个，而且没有选择速度的选项

求助，谢谢！