Samsung S5PC100, User Manual

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S5PC100 USER’S MANUAL (REV1.0) I2S CONTROLLER(5.1CH)
10.2-1
10.2
I2S CONTROLLER(5.1CH)
1 OVERVIEW
Inter-IC Sound (I2S) is one of the popular digital audio interfaces. The bus handles audio data, while the other
signals, such as sub-coding and control, is transferred separately. It is possible to transmit data between two I2S
bus. To minimize the number of pins required and to keep wiring simple, basically, a 3-line serial bus is used. It
consists of a line for two time-multiplexed data channels, a word select line and a clock line.
I2S interface transmits or receives sound data from external stereo audio codec. To transmit or receive data, two
32-bitsx64 First-In-First-Out (FIFO) data structures are included and DMA transfer mode to transmit or receive
samples is supported. I2S-specific clock is supplied from internal system clock controller through I2S clock divider
or direct clock source.
I2S V5.0 (I2S0) handles up to 2 sound sources. For example, default system sound using OS s/w sound mixer is
delivered to primary sound path and special application bypassing OS s/w sound mixer to secondary sound path.
I2S V5.0 mixes primary sound source and secondary sound source.
2 FEATURE
•
Mixes up to 2 sound sources: Primary sound source and Secondary sound source.
•
Primary sound source drives up to 5.1ch I2S-bus for audio interface with external DMA-based operation
•
Secondary sound source supports stereo sound channels with internal DMA
•
Serial, 8/ 16/ 24-bit per channel data transfers
•
Supports I2S, MSB-justified and LSB-justified data format
•
I2S v5.0 (I2S0) interrupt wakes-up system from IDLE and DEEP_IDLE mode.