5.14AudioSerialPort(ASP)
TMS320DM355
DigitalMediaSystem-on-Chip(DMSoC)
SPRS463A–SEPTEMBER2007–REVISEDSEPTEMBER2007
DM355includestwoseparateASPcontrollers.Theprimaryusefortheaudioserialport(ASP)isforaudio
interfacepurposes.TheprimaryaudiomodesthataresupportedbytheASParetheAC97andIISmodes.
Inadditiontotheprimaryaudiomodes,theASPsupportsgeneralserialportreceiveandtransmit
operation,butisnotintendedtobeusedasahigh-speedinterface.TheASPisbackwardcompatiblewith
otherTIASPs.TheASPsupportsthefollowingfeatures:
•Full-duplexcommunication
•Double-buffereddataregisters,whichallowacontinuousdatastream
•Independentframingandclockingforreceiveandtransmit
•Externalshiftclockgenerationoraninternalprogrammablefrequencyshiftclock
•Double-buffereddataregisters,whichallowacontinuousdatastream
•Independentframingandclockingforreceiveandtransmit
•Directinterfacetoindustry-standardcodecs,analoginterfacechips(AICs),andotherserially
connectedanalog-to-digital(A/D)anddigital-to-analog(D/A)devices
•DirectinterfacetoAC97compliantdevices(thenecessarymultiphaseframesynchronizationcapability
isprovided)
•DirectinterfacetoIIScompliantdevices
•Awideselectionofdatasizes,including8,12,16,20,24,and32bits
•μ-LawandA-Lawcommanding
•8-bitdatatransferswiththeoptionofLSBorMSBfirst
•Programmablepolarityforbothframesynchronizationanddataclocks
•Highlyprogrammableinternalclockandframegeneration
FormoredetailedinformationontheASPperipheral,seetheDocumentationSupportsectionforthe
AudioSerialPort(ASP)ReferenceGuide.
SubmitDocumentationFeedbackPeripheralInformationandElectricalSpecifications137
