I2S

Inter-Integrated Circuit Sound (I²S, I2S or IIS) is a serial bus for transmitting two-channel, digital audio as pulse-code modulation (PCM) between integrated circuit (IC) components of an electronic device. An I²S bus separates clock and serial data signals, resulting in simpler receivers than those required for asynchronous communications systems that need to recover the clock from the data stream. Despite a similar name, I²S is unrelated to I²C.