The M66291 is a general purpose USB (Universal Serial Bus) device controller compliant with the USB

Specification Revision 2.0 and supports full speed transfer. The USB transceiver circuit is included, and the M66291

meets all transfer types which are defined in the USB specification. The M66291 has FIFO of 3 Kbytes for data

transfer and can set 7 endpoints (maximum). Each endpoint can be set programmable of its transfer condition, so can

correspond to each device class transfer system of USB.