Table of Contents
Advertisement
S3C6400X RISC MICROPROCESSOR
36
IIS-BUS INTERFACE
OVERVIEW
IIS (Inter-IC Sound) is one of the popular digital audio interface. The bus only handles audio data, while the other
signals, such as sub-coding and control, are transferred separately. It is possible to transmit data between two IIS
bus. A 3-line serial bus is used which consist of a line for two time-multiplexed data channels, a word select line
and a clock line, to minimize the number of pins required and to keep wiring simple.
IIS interface transmits or receives sound data from external stereo audio codec. For transmitting and receiving
data, two 32x16 FIFOs (First-In-First-Out) data structures are included. DMA transfer mode for transmitting or
receiving samples can be supported. IIS-specific clock can be supplied from internal system clock controller
through IIS clock divider or direct clock source.
FEATURE
The IIS-BUS interface includes the following features:
2-ch IIS-bus for audio interface with DMA-based operation
Serial, 8-/16-bit per channel data transfers
Supports IIS, MSB-justified and LSB-justified data format
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
IIS-BUS INTERFACE
36-1
Advertisement
Table of Contents
