Transcription of AN295: USB Audio Class Tutorial - Silicon Labs
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AN295: USB Audio Class Tutorial - Silicon Labs
Rev. 6/06 Copyright 2006 by Silicon LaboratoriesAN295AN295 USB Audio Class TUTORIAL1. IntroductionIsochronous data transfers can be used by universal serial bus (USB) devices designed to transfer data to or froma host at a constant rate. Systems streaming Audio employ isochronous transfers to transmit Audio signals in real-time. Silicon Laboratories microcontrollers robust USB peripheral supports isochronous transfers, and eachfamily s assortment of additional high quality peripherals make them excellent single-chip solutions for USB-basedembedded system document contains the following: A USB protocol overview concentrating on isochronous transfers A Firmware Template that provides a starting point for custom USB Audio Class device firmware An example system illustrating requirements and operation of USB Audio Class OverviewThe first section of this application note discusses the key points of the USB specification that must be followed byall USB devices, as well as isochronous transfer protocol requirements.
Device Class Definition for Audio Devices”) Master and channel controls, depending on what features the Audio Device supports (values can be found in the “USB Device Class Definition for Audio Devices”) Audio Format Descriptor – the template contains a descriptor structure for a Type I format audio stream. Using
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