ESP32 - I2S / I²S - Can I really use any pin?
Posted: Fri Dec 18, 2020 8:07 pm
Hello,
I am trying to create a custom ESP32-wroom based PCB with an I²S microphone.
As the PCB has more tasks to fulfill, the GPIOs are becoming rare. So I can not use any pin anymore.
I read a lot in the [Technical Reference Manual][https://www.espressif.com/sites/default ... ual_en.pdf] but I do not understand everything 100%.
As far as I understand, ws_io_num and data_out_num can be any pin, but bck_io_num can only be some specific pins, but I do not understand which!
Can someone tell me, which pins I can use for I2S?
I am trying to create a custom ESP32-wroom based PCB with an I²S microphone.
As the PCB has more tasks to fulfill, the GPIOs are becoming rare. So I can not use any pin anymore.
I read a lot in the [Technical Reference Manual][https://www.espressif.com/sites/default ... ual_en.pdf] but I do not understand everything 100%.
As far as I understand, ws_io_num and data_out_num can be any pin, but bck_io_num can only be some specific pins, but I do not understand which!
Can someone tell me, which pins I can use for I2S?