Designing a low-cost USB interface for an Uninterruptible Power Supply with the Cypress Semiconductor CY7C63001 USB Controller

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What is USB?
The Universal Serial Bus or USB is a communications architecture that allows a PC to interconnect various devices using a simple four-wire cable. A standard interface allows data rates of 12Mbps.

What is a semiconductor?
A class of materials, for instance silicon and germanium, whose electrical properties lie between those of conductors (such as copper and aluminum) and insulators (such as glass and rubber). It displays relatively high resistance in pure state and much lower resistance when it contains small amounts of certain impurities.