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ADAU1401A initialize sequence

Question asked by takepiro on Apr 28, 2011
Latest reply on May 8, 2011 by takepiro

Dear support team,

 

I confused about these descriptions below:

     Datasheet P.17

     RECOMMENDED PROGRAM/PARAMETER LOADING PROCEDURE

     1.Set Bits[4:3] (active low) of the DSP core control register (Address 2076) to 1 to mute the ADCs and DACs. This begins a volume ramp-down.
    
     Datasheet P.39
     Table 47
     ADM
     Mute ADCs. This bit mutes the output of the ADCs. The bit defaults to 0 and is active low;
     therefore, it must be set to 1 to transmit audio signals from the ADCs.
     DAM
     Mute DACs. This bit mutes the output of the DACs. The bit defaults to 0 and is active low;
     therefore, it must be set to 1 to transmit audio signals from the DACs.
I think that
when bit4 and 3 are 0, ADC and DAC are muted.
(I checked it by evaluation board)
So I think that
In step 1 of initialize sequence,we should write b00 to bits[4:3].
But,P.17 description and Tool downloaded data(in capture window) write b11 to bits[4:3].
(Param Address:  0x081C      Bytes:  2        Param Data: 0x00, 0x18)
Which is correct?
Best regards,
Takehiro Yabune

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