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| Figure 1: The coveted SuperSpeed USB logo |
Certifying a device's implementation of a serial protocol standard is a fairly complex process involving a number of levels: electrical test, interoperability, backward compatibility, link layer, and so on. Generally, some organization oversees a given protocol, managing the revision process for the protocol itself as well as the testing process that a product must undergo. Passing the relevant compliance test suite and having a valid Trademark License Agreement on file bestows the prized right to display the protocol's logo on the product's box (Figure 1). That logo's presence tells the product's users that their device's serial interface operates within parameters set by the overseeing organization.
