Chapter 49
Integrated Interchip Sound (I2S) / Synchronous
Audio Interface (SAI)
49.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances, see the chip configuration information.
The I
2
S (or I2S) module provides a synchronous audio interface (SAI) that supports full-
duplex serial interfaces with frame synchronization such as I
2
S, AC97, TDM, and
codec/DSP interfaces.
49.1.1
Features
Note that some of the features are not supported across all SAI instances; see the chip-
specific information in the first section of this chapter.
• Transmitter with independent bit clock and frame sync supporting 1 data line
• Receiver with independent bit clock and frame sync supporting 1 data line
• Maximum Frame Size of 16 words
• Word size of between 8-bits and 32-bits
• Word size configured separately for first word and remaining words in frame
• Asynchronous 8 × 32-bit FIFO for each transmit and receive channel
• Supports graceful restart after FIFO error
• Supports automatic restart after FIFO error without software intervention
• Supports packing of 8-bit and 16-bit data into each 32-bit FIFO word
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 1337
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