Linux/TLV320AIC3104: Get the maximum volume for the microphone and the speaker

Hi Nicolae,

can you clarify your question?    Are you not able to get the output level you require?  or are you unable to adjust the PGAs?  

I've attached a functional block diagram with registers for you.  This document is very helpful when configuring this device.  please take a look and let me know if you have any questions about configuring the inputs/outputs.

best regards, 

-Steve Wilson

7723.TLV320AIC3104_Functional_block_Diagram_With_Registers.pdf

hi,

yes, I m not able to  get the output level  required. First of all, let.s speak about the speaker (DAC): I tried to modify the register 86 but I saw that the D0 bit is not only readable, is also writable. I set it on 1 but after that I saw also that on D1 I got the flag (on D1 )on 1.That means is something wrong with the gains that I set. When I changed the dB from the bits D7-D4,( register 86) it had no impact on the output level from the TLV speaker. My  question is: which registers should I set to be able to get a maximum output level for the speaker?

For what I understood from the datasheet, PGA is for ADC (only microphone).It is not related to the DAC.I will take a look on the block diagram that you sent me.

Thanks,

Maria

Maria,

Can you share your register configuration?

it might also help if you described exactly what you are trying to do also. The LEFT_LOP/M output will not drive a speaker directly. do you have a block diagram? or can you describe your system?

the simplest way to get the Left_LOP output functioning is:
reg 37 : 0xC0 % turn on DACs
reg 41 : 0x50 %use L3 path
reg 86: 0x09 % unmute and power up LEFT_LOP/M.

This assumes all of your clocks and audio formatting is configured already.

Regarding D1 of reg 86, I am currently in the process of updating the datasheet for this device, and I've found that D1 of registers 51,58,65,72,86,93 reads:
0: All programmed gains to HPLOUT have been applied.
1: Not all programmed gains to HPLOUT have been applied yet.

but it should read:

0: Not all programmed gains to HPLOUT have been applied yet.
1: All programmed gains to HPLOUT have been applied.

I'm working to get final confirmation on this, and then I will make the change.

best regards,
-Steve Wilson

Hi,

yes. The configuration is the following. I use only the left channel. after the TLV, I have an amp. TPA2012D2RTJR connected to a speaker. Between the TLV and the amp, I have a filter, and I want to get a maximum output level for the TLV without noise. This conf is ok?
WriteToRegister(0x02, 0x00);
WriteToRegister(0x03, 0x91);
WriteToRegister(0x0B, 0x01);
WriteToRegister(0x04, 0x20);
WriteToRegister(0x05, 0x07);
WriteToRegister(0x06, 0x80);
WriteToRegister(0x66, 0xC2);
WriteToRegister(0x19, 0x80);

WriteToRegister(0x07, 0x08);

WriteToRegister(0x1B, 0x0f);
WriteToRegister(0x25, 0x80);
WriteToRegister(0x28, 0x80);
WriteToRegister(0x29, 0x40);
WriteToRegister(0x2B, 0x00);
WriteToRegister(0x52, 0x00);
WriteToRegister(0x56, 0x99);

WriteToRegister(0x08, 0xE0);
WriteToRegister(0x09, 0x00);

Thanks