STA1090 datasheet(13/127 Pages) STMICROELECTRONICS

13 / 127 page

DS13319 Rev 2

13/127

STA108x, STA109x

System description

126

2.4.1

Audio interfaces

A complete set of audio interfaces is provided, in order to simplify integration with amplifiers,

and input sources. Each interface can be routed to the sound subsystem. A complete list of

audio interfaces is provided below:



1x AUDIO ADC

–

Shared between AUX LINE and TUNER LINE

–

18 bits ∆∑

–

98 dB A-Weighted Dynamic Range, room temperature

–

-80 dB THD internally, over temperature

–

ADC Inputs are single ended 3.3 V



1x Voice ADC

–

Shared among Voice and TEL-IN lines with embedded multiplexer

–

18 bit ∆∑

–

105 dB Dynamic Range, room temperature

–

-80 dB THD, over temperature

–

Both Mic and Tel-In lines are differential inputs.



3x Stereo DAC delivering:

–

24 bits

–

103 dB A-Weighted Dynamic Range

–

90 dB THD.

–

DAC outputs are single ended, delivering 730 mVrms.



3x I2S IN

–

SAI1: 1Ch

–

SAI2: 1Ch (either TX or RX), TDM Capable up to 8x

–

SAI3: 3Ch, TDM Capable up to 8x

–

SAI4: 3Ch, TDM Capable up to 8x

–

MSP0: 1Ch TDM capable, PCM Capable

–

MSP2: 1Ch ( as alternate to SAI2) TDM capable, PCM Capable



3x I2S OUT

–

SAI2: 1Ch (either TX or RX), TDM Capable up to 8x

–

SAI3: 3Ch, TDM Capable up to 8x

–

SAI4: 3Ch, TDM Capable up to 8x

–

MSP0: 1Ch TDM capable, PCM Capable



1x SPDIF IN for CD/CDROM input with Hardware Block Decoder for CDROM error

correction.

2.4.2

Routing and sample rate converters

Each audio interface can be routed in both directions (IN/OUT) through sample rate

converters, which allow normalizing the sampling rate to the sound processing engine. The

audio routing infrastructure is designed to deliver high quality sample rate conversion on

multiple channels, allowing simultaneous audio streams, such as Bluetooth Hands Free and

audio media playback, to be handled without CPU load.

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