Integrated Interchip Sound-Inter-IC Sound-I2S

I²S Bus (IIS, or I2S) is a serial bus designed for digital audio devices.

I²S, also known as Inter-IC Sound, Integrated Interchip Sound, or IIS, is an electrical serial bus interface standard used for connecting digital audio devices together. It is most commonly used to carry PCM information between the CD transport and the DAC in a CD player. The I²S bus separates clock and data signals, resulting in a very low jitter connection. Jitter can cause distortion in adigital-to-analog converter. The bus consists of at least three lines:

1. Bit clock line
2. Word clock line (also called word select line or left right clock)
3. And at least one multiplexed data line

You may also find the following lines:

1. Master clock (typical 256 x bitclk)
2. A multiplexed data line for upload

Examples of serial communication architectures

• Morse code telegraphy
• RS-232 (low-speed, implemented by serial ports)
• RS-422
• RS-423
• RS-485
• I²C
• SPI
• ARINC 818 
• Universal Serial Bus
  
• FireWire
• Ethernet
• Fibre Channel
  
• InfiniBand 
• MIDI control of electronic musical instruments
• DMX512 control of theatrical lighting
• SDI-12 industrial sensor protocol
• Serial Attached SCSI
• Serial ATA
• SpaceWire Spacecraft communication network
• HyperTransport
• PCI Express
• SONET and SDH 
• T-1, E-1 and variants
  
• MIL-STD-1553A/B