Datasheet

OSCILLATORTRIMREGISTER(0x1B)
OscillatorTrimEnableProcedureExample
BKND_ERRREGISTER(0x1C)
TAS5706A
TAS5706B
SLOS606D–MARCH2009–REVISEDSEPTEMBER2009............................................................................................................................................. www.ti.com
TheTAS5706APWMprocessorcontainsaninternaloscillatorforPLLreference.Thisreducessystemcost
becauseanexternalreferenceisnotrequired.Currently,TIrecommendsatrimresistorvalueof18.2kΩ(1%).
ThisshouldbeconnectedbetweenOSC_RESandDVSS.
Thefactory-trimproceduresimplyenablesthefactorytrimthatwaspreviouslydoneatthefactory.
Notethattrimalwaysmustberunfollowingresetofthedevice.
Writedata0x00toregister0x1B(enablefactorytrim).
Table17.OscillatorTrimRegister(0x1B)
D7D6D5D4D3D2D1D0FUNCTION
1–––––––Reserved
(1)
–0––––––Oscillatortrimnotdone(read-only)
(1)
–1––––––Oscillatortrimdone(readonly)
––0000––Reserved
(1)
––––––0–Selectfactorytrim(Writea0toselectfactorytrim;defaultis1.)
––––––1–Factorytrimdisabled
(1)
–––––––0Reserved
(1)
(1)Defaultvaluesareinbold.
Whenaback-enderrorsignalisreceived(BKND_ERR=LOW),alltheoutputstagesareresetbysettingall
PWM,VALID1,andVALID2signalsLOW.Subsequently,themodulatorwaitsapproximatelyforthetimelistedin
Table18beforeinitiationofareset.
Table18.BKND_ERRRegister(0x1C)
D7D6D5D4D3D2D1D0FUNCTION
––––0000Setback-endresetperiodto0ms(Reserved)
––––0001Setback-endresetperiodto150ms(Reserved)
––––0010Setback-endresetperiodto299ms
(1)
––––0011Setback-endresetperiodto449ms
––––0100Setback-endresetperiodto598ms
––––0101Setback-endresetperiodto748ms
––––0110Setback-endresetperiodto898ms
––––0111Setback-endresetperiodto1047ms
––––1000Setback-endresetperiodto1197ms
––––1001Setback-endresetperiodto1346ms
––––1010Setback-endresetperiodto1496ms
––––1011Setback-endresetperiodto1496ms
––––11––Setback-endresetperiodto1496ms
(1)Defaultvaluesareinbold.
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TAS5706A is Not Recommended for New Designs