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6204BD连接电脑后显示设别描述符请求失败

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Post time 2020-8-10 19:36:16 | Show all posts Reply Awards |Descending |Read mode
你好,因为某次操作失误导致将信号输出的表笔接到了一个dcdc芯片的sw管脚,然后电脑就不能识别设备了,现在插上就显示设备描述符请求失败。请问这是fpga挂了还是usb芯片挂了。之前检查时发现1.8V电源输出实际为2.6V,重新焊接过后恢复正常,请问还能抢救一下吗
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 Author| Post time 2020-8-13 23:24:34 | Show all posts
wangshuang replied at 2020-8-12 11:06
可以测量下基准电压: 1.3v、1.8v、3.3v 看是否正常。
估计是68013a 芯片烧坏了。
...

测过,都正常了。。按住prg插上显示未知设备,直接插上就是设备描述符请求失败。。。

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 Author| Post time 2020-8-29 00:08:15 | Show all posts

换了,还是不行。。。。
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