PDM Microphone on Jetson Orin NX

Autonomous Machines Jetson & Embedded Systems Jetson Orin NX
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1

Hello,

I am designing a custom carrier board for the Jetson Orin NX. I need to interface with a pair of stereo PDM microphones but I am having trouble figuring out which pins are available for PDM input.

I have seen other posts referencing DMIC and DAP pin names, but I can’t locate them in the Orin NX datasheet or the pin configuration spreadsheet.

Please send me all available pairs of CLK/DAT pins that I can connect the PDM microphones to. Thank you!

4

Please refer to the Audio chapter in Jetson Orin NX Series and Orin Nano Series Design Guide for that.

5

I have read that chapter but only see references to the I2S pins. Are they multiplexed with the PDM input?

For example, could I use Pin #226 (I2S1_SCLK) and Pin #222 (I2S1_DIN) for PDM clock/data?

Thanks

6

DMIC is not supported as you can see in the DG.

8

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