The Universal Serial Bus (USB) is an industrial standard serialinterface between a computer and peripherals such as amouse, joystick, keyboard, UPS, etc. This application notedescribes how a cost-effective USB Uninterruptable PowerSupply Interface (UPS) can be built using the Cypress Semiconductorsingle-chip CY7C63001 USB controller. The documentstarts with the basic operations of an uninterruptablepower supply followed by an introduction to the CY7C63001USB controller. A schematic of the CY7C63001 USB controllerto the RS-232 of the UPS connection can be found in theHardware Implementation Section.
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