TLV320AIC3107 Initialisation sequence

CHli

Hi, 

First I wanted to tell other users of that Codec that the standard Linux 
Drivers (as in 2.6.35) for the TLV320AIC3x codec range is not completely 
compatible with the TLV320AIC3107. These are the two problems I saw so 
far : 

 - The intergrated Class-D amplifier control is not supported by the 
   Linux Driver. 
 - Register 73 (the register that controls the Class-D) is 
   incorrectly controlled because the driver thinks its used to control a 
   Mono output (which is not present on that chip) 

Now to my question, as I was going through the datasheet I saw (p46) 

The following initialization sequence must be written to the AIC3107 
registers prior to enabling the class-D amplifier: 

register data: 

 1. 0x00 0x0D 
 2. 0x0D 0x0D 
 3. 0x08 0x5C 
 4. 0x08 0x5D 
 5. 0x08 0x5C 
 6. 0x00 0x00 

When must that be called and what does this do ? 

When should I do that : 

 - Everytime before enabling it ? 
 - Only at initialisation ? 
 - After a SW reset ? 
 - etc. 

Thanks for the additional information about that very obscure set of 
commands. 

Best regards, 

Christophe

over 15 years ago

0 Converter Apps over 15 years ago

TI__Mastermind 28585 points

The register sequence is required after power up (or after a reset) and before enabling the class-d output driver. It is only necessary to run this sequence once (unless of course you power down or do a reset).

These undocumented registers are part of a feature that was not implemented on the AIC3107. These registers have no user options and must be executed in the order listed before enabling the class-d driver in order for it to work properly.

0 CHli over 15 years ago in reply to Converter Apps

Intellectual 330 points

Thanks for the clarifications !

0 SAKHO over 14 years ago in reply to CHli

Intellectual 390 points

Hi,

We are using a TLV320AIC3107 on a custom board and specifically The Integrated Class-D amplifier. 
But I did not understand the initialization sequence explained in the datasheet (p46).  
What registers should I write, with what data,  to enabling the class-D amplier??
We want to know the registers numbers and the corresponding data to write to this registers. 

Thank you for your insights and your help.

SAKHO

0 Converter Apps over 14 years ago in reply to SAKHO

TI__Mastermind 28585 points

The register is shown in the first column and the data is shown in the second column.

From the data sheet:

 1. 0x00 0x0D

 2. 0x0D 0x0D

 3. 0x08 0x5C

 4. 0x08 0x5D

 5. 0x08 0x5C

 6. 0x00 0x00

So the first command would be to Register 0x00 and the data would be 0x0D.

The second command would be to register 0x0D and the data would be 0x0D and so on.

0 SAKHO over 14 years ago in reply to Converter Apps

Intellectual 390 points

thank you !!!

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TLV320AIC3107 Initialisation sequence