TAS2505 is not responding over I2C

Hi,

Attached the schematics and we are able to see 1.8V at DVDD, regulated from internal LDO from 3.3V supply.

BR,

Vageesh

Hi,

Sorry missed the attachment.

Hi, Vageesh,

I've asked my colleague to work with you on this issue.

-d2

Hi Don,

Any updates on the request.

Hi Vageesh,

Are you saying that the I2C is not ACKing any writes or it is ACKing and just not doing what you expect?

Do you have any scope shots of an I2C transaction? The schematic looks ok to me.

Do you have an I2C sniffer?

Best Regards,

dave

Hi Dave,

We have I2C signal generator and analyser from http://www.totalphase.com/products/beagle-i2cspi/

when we send the data 0x18+write+0x00 +0x00+0x00 from the generator to the device we are not seeing the ack in

the analyser. We can send the analyzer log file. Also please let us know how to confirm the device is working?

Thanks in advance.

If the device is not ACKing, it sounds like there must be a very fundamental problem. Have you tried looking at each pin to verify that the correct voltages are present? Assuming that the device is powered properly, it should be ACKing I2C commands.

Hi Dave,

Attaching the screen shot of the I2C analyzer and also we measured the voltage levels it is as per recommended voltage settings

Hi Dave,

Any updates?Pls let us know if required any inputs?

Hi Vageesh,

From this screen shot, it is not clear that any data is being sent or that the device is NACKing?

Best Regards,

dave

Hi Dave,

The update is we are able to communicate with TAS2505 over I2C.

We have interfaced CC2564 with TAS2505 over I2S and when we are playing the audio we are able to see the pulses on these pins generated from CC2564.Initially we have configured the TAS2505 with configuration settings as in the attachment. But we are observed as soon as we switch on the Speaker, the TAS2505 stops communicating over I2C and not receives any further commands. if you see the command list we are switching on the speaker first and then the DAC so if I2C doesn't responds after we switch on speaker cant enable DAC ,

so please let us what configuration we are missing and help us in getting the correct configuration.

One more concern is that in the reference guide if we see the scripts, the I2C address given as 0x30[0011000] but if we use this same address the device not communicates instead we are using the address 0x18 for which device responding.

Hi Dave,

Any updates please?