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TAS5825M: When increase volume over 75% TAS5825M will mute

Part Number: TAS5825M

Dear Sir

My TAS5825M application is 2.0 (Stereo BTL) System, when volume lower then 75% can normal play but if over 75% will mute.

I measure the GPIO 1 (mute)  when normal play the voltage is 1.5V and abnormal is 0.15V, i think the GPIO function not correct

How to check and setting GPIO function?

Below is .h file i built from PPC3 for reference.


Thank you.