Reading PDM data @ 2MHz with Raspberry Pi + pigpio (Python)

[mikronauts]

You are most welcome.

HI,
Thanks for response

I shall try 4 bit one

That is because those chips don't have them...

I would use a 4 bit binary counter driven by the shit clock signal, look for a change on q3 (highest bit) which would indicate 8 clock pulses have been seen.

Thank you very much for the information.
I have read datasheet of both 74hc299 or 74hc595, but in both I could not find data ready (DR) pin.

After the serial bits are converted to parallel bits, how would I come to know that serial-to-parallel conversion is over and parallel data is ready on output pins?

Reference to DR pin in BlockDiagram.jpg