I try to reprogramming AT90USB647 chip using FLIP on Windows 10, on the Device Manager of PC, the device shows "AT90USB64" and a yellow triangle.
I try to update the drive, but it said "the best drive already installed", but still has yellow triangle there.
When I use FLIP and choose the device, and try to connect USB port, it shows USB port can't open.
Please help me to solve the problems.
When I use another chip, AT90USB1287, all works well, so I am sure it is a drive problem.