Problem understanding Esp docs for I2S
Posted: Wed Oct 23, 2024 12:10 pm
Hi everyone.
I am so new to esp developing and I'll be very glad if you could help me.
In esp-idf docs for I2S communication, in PDM Mode Tx section there is an image that shows Din/Dout pin sends Msb and Lsb values for right and left channels, however as I know, PDM is a PWM-like square wave signal with variable pulse widths that if goes through an RC filter, we could be able to get the analog main harmonic of the digitized signal. PDM sholdnt have any Msb or Lsb because it does not communicate digital data bytes but a series of pulse train to be filtered later. So what is wrong with my ideas or docs?
Thank
I am so new to esp developing and I'll be very glad if you could help me.
In esp-idf docs for I2S communication, in PDM Mode Tx section there is an image that shows Din/Dout pin sends Msb and Lsb values for right and left channels, however as I know, PDM is a PWM-like square wave signal with variable pulse widths that if goes through an RC filter, we could be able to get the analog main harmonic of the digitized signal. PDM sholdnt have any Msb or Lsb because it does not communicate digital data bytes but a series of pulse train to be filtered later. So what is wrong with my ideas or docs?
Thank