Datasheet

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AnalogOut
AnalogIn
Default End-Point
End-Point#2
(IF#1)
AudioStreaming Interface
End-Point#0
End-Point#4
(IF#2)
AudioStreaming Interface
End-Point#5
(IF#3)
HIDInterface
IT
TID1
FU
UID3
OT
TID5
OT
TID2
IT
TID4
Standard
AudioControlInterface(IF#0)
PCM2900/2902
M0024-03
Interface#0
PCM2900
PCM2902
SLES035E–MARCH2007–REVISEDMARCH2008
Figure31.USBAudioFunctionTopology
Interface#0isdefinedasthecontrolinterface.Alternativesetting#0istheonlypossiblesettingforinterface#0.
Alternativesetting#0describesthestandardaudiocontrolinterface.Aterminalconstructstheaudiocontrol
interface.ThePCM2900/2902hasfiveterminalsasfollows:
•Inputterminal(IT#1)forisochronous-outstream
•Outputterminal(OT#2)foraudioanalogoutput
•Featureunit(FU#3)forDACdigitalattenuator
•Inputterminal(IT#4)foraudioanaloginput
•Outputterminal(OT#5)forisochronous-instream
Inputterminal#1isdefinedasUSBstream(terminaltype0x0101).Inputterminal#1canaccept2-channelaudio
streamsconstructedbyleftandrightchannels.Outputterminal#2isdefinedasaspeaker(terminaltype
0x0301).Inputterminal#4isdefinedasamicrophone(terminaltype0x0201).Outputterminal#5isdefinedasa
USBstream(terminaltype0x0101).Outputterminal#5cangenerate2-channelaudiostreamsconstructedby
leftandrightchannels.Featureunit#3supportsthefollowingsoundcontrolfeatures.
•Volumecontrol
•Mutecontrol
Thebuilt-indigitalvolumecontrollercanbemanipulatedbyanaudioclassspecificrequestfrom0dBto-64dB
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ProductFolderLink(s):PCM2900PCM2902
Not Recommended for New Designs