Hello, In our application we need on board mic, speaker (not earpiece) and headset mic and headset speaker. We are doing above by using interface available in TPS65951: On board Headset: Mic: HSMIC.P, HSMIC.M,the signal of output is too low ,we need 4.0V on every point,but it's just 1.0V;Why? Speaker: HSOL,HSOR;it's just turn out half of the whole signal,the bottom of the signal is lost,the question made me crazy,please help me solve it. Another qustion is that we haven't any chapter about TPS65951's configuration,just a electric charateristic description.Why? Thank you! ]