DS90UB954-Q1: Can 953/954 connect with Codec PDM?

Bonnie Chen

Intellectual 1160 points

Part Number: DS90UB954-Q1

Hi Team,

we know that we have application note indicate that 953/954 can connect to audio codec I2S interface as below.

but my customer codec interface is PDM. can you advice if this work as the same? or how to modify or advice?

over 5 years ago

0 Sally Cheung95 over 5 years ago

TI__Expert 5480 points

Hi Bonnie,

What frequencies are your signals and how many inputs are there?

Thanks,

Sally

0 Bonnie Chen over 5 years ago in reply to Sally Cheung95

TI__Intellectual 1160 points

We need to combine the video & audio on same path.

the spec represented we can transfer to I2S but actual signal is mic PDM, i just like to check the audio signal can transform to my codec with B954's

I2S channel.

*****

sample rate 48KHz, DPM clk rate 3Mhz/ 2MIC on a board

0 Sally Cheung95 over 5 years ago in reply to Bonnie Chen

TI__Expert 5480 points

Hi Bonnie,

If you want to send the signals, you can do so via forward channel GPIO. The max recommended frequency is 5 Mhz for 4 GPIO's. You can read through that app note to give you an idea because the advice is the same. Does that answer all your questions?

Thanks,
Sally

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DS90UB954-Q1: Can 953/954 connect with Codec PDM?