The ISP1705 is a Hi-Speed Universal Serial Bus (USB) host and peripheral transceiverthat is fully compliant with Universal Serial Bus Specification Rev. 2.0 and UTMI+ LowPin Interface (ULPI) Specification Rev. 1.1. The ISP1705 is also an On-The-Go (OTG)transceiver that is fully compliant with On-The-Go Supplement to the USB 2.0Specification Rev. 1.3.This transceiver supports high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed(1.5 Mbit/s) data rates. The internal architecture of the ISP1705 is a highly optimizedULPI-compliant interface operating at 60 MHz. The ISP1705 interfaces to USB ASIC,FPGA or any system chip set through an 8-pin or 12-pin ULPI interface. All static UTMIsignals are accessed through the ULPI compliant register set. The ULPI interfaceincludes a 4-bit or 8-bit data bus, three control signals and a 60 MHz clock signal forsynchronization. The bidirectional data bus with control signals can synchronouslytransmit and receive USB packets and access register data.
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