TAS2572: TAS2572 Dual-Mono EVM + AC-MB DC058

Hey Wenbin,

Thank you so much for revewing the settings. I tried to playout sound through the USB-audio but no luck. However, the internal tone generation worked, sporadically. It was happening sometimes while changing the power on/off button on PPC3 (device control). I have kept all the default settings. Any pointers would help.

Would you please share to the datasheet with register descriptions which is not available in the doanload page in my account for TAS2572? Appreciate all your help and support.

Best,

~Rj  

Wenbin, Just confirming that the tone generation looks good.

The USB audio is still not working. Do I need to pay attention to any settings? I have selected the Speakers/soundcard selction to (TI USB Audio UAC2.0) and PPC3 -> Device Control -> Primary Channel 1 set to 48KHz and (Use USB Audio Settings). 

Thanks

Hi Raj,

can you check the IRQ which is under the "device control" page?

and meanwhile, please check the TI USB audio driver, the format should be "8 channel, 32bit).

after that, please check the volume setting in "TI USB audio Driver",

and the volume setting of windows. because there are not only one device of windows, please check the device  "TI USB audio UAC2.0", sometimes, it will be mute by windows un-expertly.

finally, please check audio hardware setting in the  app used for playback.

Let's check the results above to see whether the issue is still  there. or whether there is some issue was observed in the IRQ page. 

Br,

Wenbin

Hi Wenbin, Thanks for the suggestions. I have checked and sharing below for your review. Unfortunately, the USB audio playback through the amplifier is still not working.

The logic analyzer data shows audio data is present at the SDIN1 pin and the clocks are seen as well. 

I doubt the amplifier configuration or the data format. There is a momentary glitch sound, momentarily when I try to play.

Please let me know if you would like me to try any other settings. If you have a sample ppc3 file for this platform, please do share so that I can load it and verify. Thanks!

>>> TI USB audio driver, the format should be "8 channel, 32bit

I do not see this option for TI USB audio driver, please let me know how to set it..

Hi Raj,

It seems you met OC issues. so the device will shutdown itself to protect the device.

normally, the J43 should be used to power the device. I will copy your settings first to see whether I can reproduce your issue. if not, I will share all my settings with you for your test.

Br,

Wenbin

Hey Wenbin, 

Thanks for replicating and rootcausing the issue. It seems like the OC is triggered when audio playback starts shutdown the amplifier. The internal tone generation alone seems fine w/ USB playback. 

Goodcase: (Tone-gen and no TI-USB Audio routing)

Badcase: (Tone-gen +TI-USB Audio routing)

Badcase: (Tone-gen = OFF, TI-USB Audio routing) 

I have conencted the pins and measured ~4.74V @ J30, J55 and J45 [J43(5V), LDO_IN=5V_MB ] but the device shutdown may be happening w/ OC detection. Do you suggest supplying extenal power through J43? Thank you again!

Device Active: OFF and OC Detection 

Hi Raj, 

 are both the two channels have the same issue? you can disable the channels one by one to check whether both of them have issues.

method:  NC the iovdd/avdd jumper before connecting the power supply and usb.

besides this, please disconnect the speaker for test. just check whether there is OC reported.

PS: check the OC status before power up. if there is latched OC, clear it first.

Br,

Wenbin

Hi Wenbin,

Confirming that OC reported after disconnecting the speaker (conencted on one channel).

Now I have removed the bigger speaker with two small 8-Ohm speakers and verified them working for tone-generation case.

For USB playback case - verified again that the OC detected when the playback start (w/ blue LEDs turning ON w/ momentary glitch sound). Same is the observation for both the channels.

Re: NC the iovdd/avdd jumper for indvidual channels has not been tried as I do see the OC issue on both the channels. Let me know if I should try. 

Can you please share the datasheet w/ detail explanation of the registers etc? Thanks.   

Adding the setup pic w/ new 8ohm speakers connected.

Hi Raj，

it seems the connection is ok, only one reminder: the power supply should be stable.

if you still meet the the OC issue which is similar to the vbat absence. please check the following thing:

1 remove speaker, and then play the music, check whether the OC occurs

2 use speakers. but use very low signal level, such like -60dB.

Br,

Wenbin

Hi Wenbin,
Good News! It works with J43 power and when the signal level is lower than -30dB. It hits OC if the level goes higher. 

Thank you so much for your support.  

Hi Wenbin, Thank you so much for your support. I have tried with 5V, 3A power supply and was able go upto -20dB which is aligned with your assessment.

I would like to feed audio through the I2S line instead of USB. I have changed the source settings [S1, S0] to Ext ASI and connected BCLK, FSYNC, DIN1 to an external host platform. On the TI Amp board monitoring SBCLK1, FSYNC1 and SDIN1. The BCLK and WS look ok but the data does not look right. Any suggestions? 

Hi Raj,

can you check the i2S signal level?  normally it should be 1.8V. TAS2572 can't use 3.3V.

and BTW, the SDIN should be provided by the external host, if the signal is not right, please check the host first.

Br,

Wenbin

Hi Wenbin,

The signal levels on the host side is ~0.87v and the host lines are connected thr AC-MB J7: BCLK, FSYNC, DIN1.

I have added standalone and integration test plots in a separate ticket for your reference. Appreciate any pointers.

e2e.ti.com/.../tas2572-tas2572-amplifier-playback-w-data-injection-through-ext-audio-source-interface---i2s  

Best,

~Rj