Which pins on the Nano BLE 33 board are suitable for a PDM mic breakout

Official Hardware Nano Family Nano 33 BLE
1

I have an Adafruit PDM mic breakout board (https://learn.adafruit.com/adafruit-pdm-microphone-breakout/overview) and want to use this breakout with my Nano BLE 33 board.

So, are there any particular pins on the Nano BLE 33 board which are suitable or offer i2s for the pdm clock and data out pins.

If not, I see that the PDM mic on the Nano Sense board is the same or similar to the Adafruit PDM breakout.

So I thought I probably could hack my BLE board as the PDM footprint is there on the board but not populated.

However, I see that on the Nano Sense board the SELECT pin is pulled high while on the Adafruit breakout the SELECT pin is pulled low to ground. Will this make any difference (assume more so for the PDM library).

2

Just to confirm that the hack method, i.e. solder wire directly and very carefully onto pads 3 (CLK) & 4 (DAT) of PDM footprint works fine.

I hooked up my Adafruit PDM breakout with power via 3V / GND and left SELECT unconnected, and it works great with the Arduino example "PDMSerialPlotter"

Still interested to know what other Arduino pins I could use here.

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