Using the I2S Audio Interface of DS90Ux92x FPD （使用DS90Ux92x FPD的i2音频接口）.pdf

Application Report SNLA221– June 2013 Using the I2S Audio Interface of DS90Ux92x FPD-Link III Devices Mahendra Patel, Ryan Bailey ABSTRACT I2S is a standard protocol for transmitting two channels (stereo) Pulse Code Modulated digital data over a 3-wire serial bus. Advanced automotive systems require transport of multiple audio data sources, such as mobile devices, Navigation systems, Infotainment, security, or gaming consoles, to speakers located throughout the vehicle. Also, surround sound systems requiring multiple audio data channels may be utilized to enhance the quality and richness sound reproduction. This document describes how to use the Inter-IC Sound (I2S) features of the DS90Ux92x family of FPD-Link III Serializers and Deserializers. Contents 1 Introduction 2 2 I2S 2 2.1 Interface 2 2.2 Bit Rate Calculation 3 3 Operation 3 3.1 Timing Supported 3 3.2 Transport Methods 4 3.3 Multi-Channel Operation 5 3.4 Deserializer MCLK 6 3.5 Backward Compatibility 7 3.6 Repeater Configuration 7 3.7 Control Registers