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6.8.3ControlRegister3Tab
6.8.4ControlRegister4Tab
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KitOperation
Figure8.ControlRegister2Tab
TheControlRegister3Tab(Figure9)allowstheusertosettheDACOversamplingRate(OSR),set
theAsynchronousSamplingRateFactorandpowerdowntheADCorDACwiththePowerDown
Controls.Theindicatorbeloweachpowerdownswitchwilllightwhenononlyiftheregisterdatasentby
pressingtheProgramDevicebuttonisacknowledged.TheUSB-MODEVMAudioInterface
Configurationcurrentlyallowsafixedsamplingrateandasinglecodec.ForanOSR=256thevalueofM,
setinregister4,mustbeamultipleof2.Similarly,foranOSR=512thevalueofMmustbeamultipleof4.
Figure9.ControlRegister3Tab
TheControlRegister4Tab(Figure10)providescontrolsforP,NandM.Furthermore,anFScalculator
isprovidedforconvenience.ThecalculatorderivesFSfromtheMCLKfrequencyenteredbytheuseror
loadedbyapresetbyusingtheequation:FS=MCLK÷(16×P×M×N).ThePLLMethodswitchillustrates
thatforcoarsesampling,Pmustbeequalto8.PleasenotethattheFScalculatorandthePLLMethod
SLAU229B–October2007–RevisedAugust2008TLV320AIC12KEVMB-KandTLV320AIC14KEVMB-KUser'sGuide17
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