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TAS5766M: TAS5766M

Part Number: TAS5766M

Greetings

on a custom board we are trying to bring up TAS5766M part.  

we are feeding BCLK, LRCLK and I2S data to I2S input port and  can see same audio appear on I2S output (SDOUT).  However there is no signal present on DACR pin and on power output pins (in mono configuration).  we are lost as to why that is. any suggestion ?