Datasheet

SOFTMUTEREGISTER(0x06)
TAS5706A
TAS5706B
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BitD3defineswhichvolumeregisterisusedtocontrolthevolumeoftheHP_PWMxoutputswheninheadphone
mode.Whensetto0,theHPvolumeregister(0x0C)controlsthevolumeoftheheadphoneoutputswhenin
headphonemode.WhenbitD3issetto1,thechannelvolumeregisters(0x08–0x0B,0x0D)areusedforall
modes(lineout,headphone,speaker).
BitsD2–D1definetheoutputmodes.Thedefaultisspeakermodewiththeheadphonemodeselectableviathe
externalHPSELterminal.ThedevicecanalsobeforcedintoheadphonemodebyassertingbitD1(allother
PWMchannelsaremuted).AssertingbitD2putsthedeviceintoapseudo-line-outmodewheretheHP_PWMx
andallotherPWMchannelsareactive.BitD3mustalsobeassertedinthismode,andtheHP_PWMxvolumeis
controlledwiththemainspeakeroutputvolumecontrolsviaregisters0x08–0x0Band0x0D..
Table8.SystemControlRegister2(0x05)
D7D6D5D4D3D2D1D0FUNCTION
0–––––––Reserved
(1)
–10–––––Allchannelsareshutdown(hardmute).VALID1=0.
–11–––––Allchannelsareshutdown(hardmute).VALID1=0
(2)
WhenD6isdeasserted,allchannelsnotbelongingtoshutdowngroup(SDG)arestarted.
–00–––––
SDGregisteris0x19.
–01–––––WhenD6isdeasserted,allchannelsarestarted.VALID1=1.NochannelsinSDG1.
–––0––––Reserved
(2)
UseHPvolumeregister(0x0C)foradjustingheadphonevolumewhenin
––––0–––
headphonemode.
(2)
––––1–––Usechannelvolumeregisters(0x08–0x0B,0x0D)forallmodes.
–––––00–Speakermode.Hardwarepin,HPSEL=1,forcesdeviceintoheadphonemode.
(2)
–––––01–HPmode.ThissettingislogicallyORedwithexternalHPSELpin.
Lineoutmode.Hardwarepin,HPSEL,isignoredforthissetting.HP_PWMxpinsare
–––––10–
active.
–––––11–Reserved
–––––––0Reserved
(2)
(1)Defaultvaluesareinbold.
(2)Defaultvaluesareinbold.
Writinga1toanyofthefollowingbitssetstheoutputoftherespectivechannelto50%dutycycle.Defaultis
0x00.
Table9.SoftMuteRegister(0x06)
D7D6D5D4D3D2D1D0FUNCTION
–––––––1Softmutechannel1
––––––1–Softmutechannel2
–––––1––Softmutechannel3
––––1–––Softmutechannel4
––1–––––Softmutesubwooferchannel(channel6)
00000000Unmuteallchannels
(1)
(1)Defaultvaluesareinbold.
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TAS5706A is Not Recommended for New Designs