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am1808 USB 1.1 host could not read file while start up

a small qty mess production, 500pcs 1808 board,

when there is a usb disk inserted into USB 1.1 host port, the port will halt sometimes while boot, could mount normally, could ls, but while read, system failed to respond, anybody knows what's wrong with the board? hardware or software?

 

best regards,

Power Pan