The ISP1583 is a cost-optimized and feature-optimized Hi-Speed Universal Serial Bus (USB) Peripheral Controller. It fully complies with Ref. 1 "Universal Serial Bus Speci?cation Rev. 2.0", supporting data transfer at high-speed (480 Mbit/s) and full-speed (12 Mbit/s). The ISP1583 provides high-speed USB communication capacity to systems based on microcontrollers or microprocessors. It communicates with a microcontroller or microprocessor of a system through a high-speed general-purpose parallel interface. The ISP1583 supports automatic detection of Hi-Speed USB system operation. Original USB fall-back mode allows the device to remain operational under full-speed conditions. It is designed as a generic USB Peripheral Controller so that it can ?t into all existing device classes, such as imaging class, mass storage devices, communication devices, printing devices and human interface devices.