求翻译：样品使用JTAG下载程序没有问题，如果使用外置电源，JTAG烧录外后，重新连接USB，FPGA里面的程序还没有丢失，但有时不能使用AS下载程序，是什么意思？

Samples using jtag Download the program no problem, if you use the external power supply after the jtag burning outside, re-connect the usb fpga inside the program has not yet lost, but sometimes can not be used as download

Download the sample program using JTAG there is no problem, if you use an external power supply, JTAG after burning out, re-connect FPGA USB inside, the program has not been lost, but sometimes cannot be used to download the program AS

The sample uses the JTAG downloading procedure not to have the question outside, if uses sets at the power source outside, after the JTAG fever records, connects inside USB, FPGA the procedure not to lose, but sometimes cannot use AS to download the procedure,

Samples using JTAG download no problem, if you use an external power supply, after JTAG burn out, reconnect the USB,FPGA the program has not been lost, but sometimes cannot be used AS to download,

正在翻译，请等待...