Datasheet

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2.7AudioDSPCore
TAS3108,TAS3108IA
AUDIODIGITALSIGNALPROCESSORS
SLES152B–OCTOBER2005–REVISEDNOVEMBER2007
TheaudioDSPcorearithmeticunitisafixed-pointcomputationalengineconsistingofanarithmeticunit
anddataandcoefficientmemoryblocks.TheprimaryfeaturesoftheaudioDSPcoreare:
•48-bitdatapathwith76-bitaccumulator
•Hardwaremultiplier(28bit×48bit)
•Read/writesingle-cyclememoryaccess
•Inputis48-bit2s-complementdatamultiplexedinfromtheSAPimmediatelyfollowinganLRCLKpulse.
•Outputis32-bit2s-complementdataonfourbuses.
•Separatecontrolforwritingtodelaymemory
•Separatecoefficientmemory(28bit)anddatamemory(48bit)
•Linearfeedbackshiftregister(LFSR)isarandom-numbergeneratorthatcanbeusedtoditherthe
audio.
•CoefficientRAM,dataRAM,LFSRseed,programcounter,andmemorypointersareallmappedinto
thesame5.88Kmemoryspaceforconvenientaddressingbythemicroprocessor.
•Memoryinterfaceblockcontainsfourpointers–twofordatamemoryandtwoforcoefficientmemory.
TheaudioDSPcoreisusedtoimplementallaudioprocessingfunctions.
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