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USB 2.0 controller runs two ports simultaneously

Posted: 05 Dec 2007 ?? ?Print Version ?Bookmark and Share

Keywords:USB 2.0? high-speed controller LSI? car navigation?

Seiko Epson Corp. has developed a new USB 2.0 controller LSI product that is capable of operating two USB ports simultaneously. The S1R72V18 takes advantage of the low power consumption of the S1R72V Series and enables isochronous transfer which is used when connecting to portable music players. In addition, the new model comes equipped with two high-speed USB 2.0 ports: one shared port for both device and host functions and one port exclusively for host functions.

The main target application for this controller is car navigation systems for which multiple ports are becoming increasingly common. With this market in mind, it has a guaranteed operating temperature range of -40C to 105C, and meets the specifications for the AEC-100 industry standard for automobile electronics quality.

The S1R72V18 supports HS (480 Mbps), FS (12 Mbps), LS (1.5 Mbps) transfer rates; and control, bulk, interrupt, and isochronous transfer. It has a built-in pull-down resistance for downstream port so an external circuit is not required. It is compatible with 16bit width general CPU interface and includes DMA 2 ch with one DMA, multiword procedure, and slave for each port. Interface voltage change is possible from 1.8V to 3.3V.

Its crystal oscillator clock input may be 12MHz or 24MHz, and package options include several BGA and QFP packages. Shipments of samples of the S1R72V18 have already commenced.

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