ISP1521 Hi-Speed Universal Serial Bus hub controller Rev.
03 — 24 November 2004 Product data 1.
General description The ISP1521 is a stand-alone Universal Serial Bus (USB) hub controller IC that complies with Universal Serial Bus Specification Rev.
2.
0.
It supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.
5 Mbit/s).
The upstream facing port can be connected to a Hi-Speed USB host or hub or to an Original USB host or hub.
If the upstream facing port is connected to a Hi-Speed USB host or hub, then the ISP1521 will operate as a Hi-Speed USB hub.
That is, it will support high-speed, full-speed and low-speed devices connected to its downstream facing port...

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