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BF527 USB B Device

Question asked by turtur on Jun 9, 2011
Latest reply on Jun 14, 2011 by turtur


I have my own BF527 test PCB, I connect USB_ID pin to GND direct . The B_DEVICE bit of USB_OTG_DEV_CTL is 0, and when I connect some USB disks to BF527, the B_DEVICE bit is 0 also. But when I connect one USB disk to my BF527, the B_DEVICE bit changes to 1, and after I disconnect this USB disk, B_DEVICE bit is also 1. WHY?

Please help me!