Increasing Bandwidth and Connectivity in Embedded Applications
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This white paper explains the benefits of the High-Speed SUMIT Interconnect Standard which enables PCI Express and a variety of other high and low speed signals. Over the last few years, high-speed serial buses, or switch fabrics, have replaced older, slower, and cumbersome parallel interfaces in embedded designs. Most of them have not lasted. Meanwhile, most microprocessors, primarily Intel silicon, have adopted the PCI Express bus. PCI Express is a serial bus which allows data to be sent in two directions at the same time, doubling the effective bandwidth. Each PCI Express lane (port) provides more bandwidth than the original 133 MBytes/s PCI parallel bus. PCI Express typically provides throughput of up to 250 Mbytes/s per lane, (500 MBytes/s per lane bidirectional) in version 2.0, and up to 1 GBytes/s per lane (bidirectional) in version 3.0. It is used both as a motherboard-level interconnect and as an expansion card interface for adding boards. Products with the SUMIT connector bring the power of PCI express, while continuing to support a host of legacy interfaces.