By the way, it is highly recommended that you buy the Explorer 16 demo board and the associated PICtail+ USB and USB PIM for PIC24. Then you can play with the demos. I am still more on the device side and have not played too much with the host/otg side. PIC24 USB starter kit is cheaper but more limited. -- Xiaofan http://mcuee.blogspot.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist