TLV320ADC5140: [TLV320ADC5140] One sound choose error channel number

Hello,

I will take a look at this and get back to you within 48 hours.

Best Regards,

Carson 

Low Power Audio Apps

Hi,Carson Allen

Thank you for replay.

If we set ASI_WLEN to 3,there have noise in record data.

We use TDM BCLK is 24.576M = 16bit * 32 slot * 48K.

This ADC have problem and use 3 analog input.

Other three ADC use DMIC don't have this problem.(24 slot corresponding 24 DMIC)

Please help check it.

thanks

Hello,

Are these other ADCs sharing clocks and same audio data bus?

Carson

Hi,

Yes,all ADC use same TDM clk.

By the way，when the problem happen....other ADC channel also change changnnel position.

Let me summarize the status

1)If we don't enable analog input.

slot0 - slot7 is NULL and slot 8 - slot 31 is ADC data.

2)But if we enable analog input

analog input is slot 1 and slot 7 - slot 30 is ADC data

3)We wish status is 

analog input is slot 2 and slot 8 - slot 31 is ADC data.

thanks

Hello,

So in register map I see that register 0x46 is still at default value, are you making sure to adjust it to differential instead of single-ended?

Also are all the TLV320ADC5140s set to same word length?

Best Regards

Carson

Hi

I try to changed CH3_INSRC[1:0] to differential or single-enable.

it has no impact or change.

all the TLV320ADC5140s set to same word length?

>>>

Yes,all slot set to 16bit word length.

And we also find a problem.

If ADC record sound after play music to pa,this problem don't happen.analog input is slot 1

But if you record sound before play,this problem will happen.analog input is normal slot 2

thanks

Hello Zeng,

Is it possible for you to try this same configuration on one of the devices you have and see if issue is recurring?

Best,

Carson

Hi

We are in EVT stage and The factory has produced many machines.

I have tested 20 machines and also have the problem.

In fact, we have a similar problem.

We use your PA tas5805m which use same TDM with ADC.

If ADC record befor playback,it's OK.

But if ADCrecord after playback,the tas5805m volume will increase and there will be noise.

I think maybe it's same problem.

Is it possible that it is due to CLK timing?

thanks

Hello Zeng, 

This probably most likely has to do with TDM settings being same for each device with shared data line or possibly clock timing.

Could you verify if TDM settings are lined up to be same on each device and recorded clock on input is synchronized.

There may also be problem with sync of device to convert analog especially differential into output data vs converting Digital MIC conversion on different device but using same data line out for transmission. There may be a incompatibility there but have you or do you have ability to add TX_OFFSET to see if that makes a difference. 

I will reach out to colleagues for more opinion on this set-up.

Could you test output condition when only device connected to output is the device that has analog input?

Hi,Carson Allen

OFFSET

>>>

We got new progress.

If ADC record sound after tas5805 playback.

The  tas5805 will get noise and  volume gets louder.

The problem is fixed after change tas5805 OFFSET to 4 bit.

As you know,if ADC record sound before tas5805 playback,the ADC channel also change.

So i think the two problem both cause by clk timing.

I have asked HW team help confirm it.

thanks

Alright good to hear progress has been made, keep me updated if more answers from my side are required

Carson