TAS2563YBGEVM-DC: cannot use PDM function with EVM

Hi Joe,

I'd like to ask a few questions to better understand the test setup:

• Which version of PPC3 and TAS2563EVM plugin is customer using? They can share a capture of the "About" dialog within PPC3.
• Can you double check the PDMCK frequency? This just to check TAS2563 configuration is OK.
• By PDM_Mic waveform I assume you refer to PDMD (data) is that correct? Is the digital mic supplied by the same voltage level as IOVDD on TAS2563?
• I assume you're using J15 or J9 to connect the PDM signals, could you please confirm?

Thanks
Best regards,
-Ivan Salazar
Applications Engineer

HI Ivan

1. PPC version V3.2.1 software version: TAS2563QFN EVM 3.0.0

2. PDMCK is around 2.5M

3. PDM_Mic waveform is PDMD, PVDD and Vbat use the same power supply in EVM

4. the EVM i use is TAS2x63EVM the jumper is J13 not J15/J19

Thank you

Best regards

Joe

23AUG

Hi Joe,

Thanks for the information. The software version should be OK for the EVM version you're using.

Regarding PVDD and VBAT: PVDD is not usually supplied externally, this is actually generated by the integrated boost from VBAT, and the PVDD jack available only for external PVDD use cases (which implies PVDD > VBAT, and internal boost is fully disabled and bypassed).

Are you able to play any audio from the EVM, regardless of PDM interface operation? PDMCK should be 3.072MHz so my guess is there may be an issue in the test setup which makes the device to disable automatically. Please try this procedure:

• Open PPC3 and TAS2563QFN app.
• Connect EVM to USB and power.
• Connect EVM to PPC3 using the bottom-left button "Connect".
• Click on "Tuning and Audio Processing".
• Click on "Select" below the "PDM" column in the audio modes.
• After few seconds, the device should be initialized and ready to play audio.
• Go back to Home panel, then click on "Device Control".
• Click on "IRQ" at the top-right corner.
• Click on "Read" and please share a capture of the flags you see in red here, then we can know if there's an issue.

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan

here is the screen shoot of the check list:

the measured clock is 2.5M not in accordance with 3.072M

Thank you

Best regards

Joe

25 AUG

Hi Joe,

Regarding the audio output, are you able to play audio through the EVM? You can use any audio from PC as the EVM works as any other soundcard. I wonder if the device is working normally on the playback path at least.

The jumpers on your EVM are as default, correct?
Can you please show this part of the Device Control panel as well? Just want to check the defaults are applied:

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan

I will apply a EVM and test it by myself, I will reach out to you latter.

Thank you

Best regards

Joe

29 AUG

Hi Joe,

Thanks for the notice. Let us know how the test goes on your end, you may reach out offline as well for a webex session if needed.

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan

Here is some picture and waveform from my side:

the audio can be played with EVM, all jumpers are set default.

As you can see the PDM clk is normal in my EVM, but the voltage level of PDM data is low, if I test the sound in this page of windows system, there is no input can be recognized.

1. EVM connection:

2. PDMCK waveform:

3. PDMD waveform:

4. PPC3 file

TAS2563file.ppc3

Thank you

Best regards

Joe

5 SEP