Inter-IC Sound Bus (I2S)

特性

• 仅用于主控
• Single- and multi-channel (up to 10 channels) I2S support
• 每次采样 8 到 32 数据位
• 16、32、48 或 64 位字选择周期
• Data rate up to 96 kHz with 64-bit word select period
• Audio clip detection in I2S Rx mode
• Byte swap audio samples to match USB audio class endianness requirement

概述

集成 Inter-IC 音频总线 (I2S) 是用于将数字音频器件连接在一起的串行总线接口标准。此规范来自于 Philips® Semiconductor（I2S 总线规范；1986 年 2 月，修订时间为 1996 年 6 月 5 日）。

The I2S component operates in master mode only. It also operates in two directions, as a transmitter (Tx) and a receiver (Rx). The data for Tx and Rx are independent byte streams. The  byte streams are packed with the most significant byte first and the most significant bit in bit 7 of  the first word. The number of bytes used for each sample (a sample for the left or right channel)  is the minimum number of bytes to hold a sample.