![]() ![]() More recently, USB 3.x has introduced SuperSpeed (5Gb/s) and beyond. USB 2.0 introduced High Speed (480Mb/s), which helped when larger quantities of data were being transferred this applied to larger hard drives and streaming media. In its first versions, USB offered Low Speed (1.5Mb/s) and Full Speed (12Mb/s) these addressed most user requirements. A USB subsystem can support up to 127 devices, so it has no lack of capacity. It minimises the number of connectors and cables and offers a true “plug-n-play” experience. USB was invented to provide an effective and more user-friendly alternative to traditional serial and parallel interfaces. Although an embedded software engineer need not understand every last detail of how USB works, some insight is useful, even if a commercially available USB stack is employed. The simplicity of its use hides complexity in its implementation. Adding a peripheral device is usually straightforward for even the most non-technical users. There is no doubt that, since the introduction of USB over 20 years ago, personal computers have become easier to use. ![]()
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