Transcription of Application Note 17 - Microchip Technology
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October 19981 Application Note 17 Application Note 17 MicrelApplication Note 17 universal serial Bus Power Managementby Kevin LynnIntroductionPower management and distribution is a major factor incorrectly designing USB ( universal serial Bus) methods of designing USB peripheral power distribu-tion are crucial to ensure full compliance with the USBspecification, including compliance with electromagnetic in-terference (EMI) and voltage regulation ClassesUSB defines several device classes, differentiated by theirpower requirements or capabilities. The most important de-vice classes are hubs and provide for distribution of data and power to down-stream (away from the host) devices and communicate withthe host.
Application Note 17 Universal Serial Bus Power Management by Kevin Lynn Introduction Power management and distribution is a major factor in correctly designing USB ...
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8 UNIVERSAL SERIAL BUS, 8 Universal Serial Bus 8 UNIVERSAL SERIAL BUS, Universal Serial Bus USB, Serial, Universal Serial Bus, IEEE, IEEE 1394 FIREWIRE USB, UNIVERSAL SERIAL BUS PROTOCOL SOLUTIONS, UNIVERSAL SERIAL BUS PROTOCOL SOLUTIONS FOR TESTING AND VERIFICATION, Universal Serial Bus Specification, Universal Serial Bus Test and Measurement Class Specification USBTMC, Measurement Class, Subclass USB488 Specification USBTMC-USB488, Universal Serial Bus (USB) Cable Isolator Circuit