4.6.8HeadphoneSelect(HP_SEL)
t
d(VOL)
HP Volume
HP_SEL
Spkr Volume
t
(SW)
T0033-02
t
d(VOL)
t
d(VOL)
t
d(VOL)
t
(SW)
t
w(HP_SEL)
4.6.9VolumeControl
TAS5518C
8-ChannelDigitalAudioPWMProcessor
www.ti.com
SLES238A–SEPTEMBER2008–REVISEDJULY2009
Controlsignalparametersoverrecommendedoperatingconditions(unlessotherwisenoted)
PARAMETERMINMAXUNIT
t
w(HP_SEL)
Pulseduration,HP_SELactive 350Nonens
t
d(VOL)
SoftvolumeupdatetimeDefinedbyratesetting
(1)
ms
t
(SW)
Switchovertime0.21ms
(1)SeetheVolume,Treble,andBaseSlewRatesRegister(0xD0)section.Section7.27.
Figure4-8.HP_SELTiming
Controlsignalparametersoverrecommendedoperatingconditions(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINMAXUNIT
Individualvolume,mastervolume,ora
Maximumattenuationbeforemute–127dB
combinationofboth
MaximumgainIndividualvolume,mastervolume18dB
Maximumvolumebeforetheonsetofclipping0-dBinput,anymodulationlimit0dB
PSVCrangePSVCenabled12,18,or24dB
PSVCratef
S
PSVCmodulationSinglesided
PSVCquantization2048Steps
6%95%
PSVCPWMmodulationlimitsPSVCrange=24dBdB
(120:2048)(1944:2048)
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Not Recommended For New Designs
