Hello,
The datasheet for the PCM1861 has the following information for the INT (no. 19) pin:
Page 5 - "Pull High for Active Mode, Pull Low for Idle."
Page 53 - "The INT pin is ideally designed to be used with a microcontroller that can treat the pin as both an input (when used as an interrupt) and as an output to pull the pin high, and force power-down."
Page 57 - "Configure the microcontroller INT pin to be an input for interrupts, or change the function to output to pull high to power down the PCM1861."
A few questions please:
1) Which is the correct polarity for active mode / power down mode?
2) The pin description on page 5 says "Pull high... Pull low..." but the application information says to pull it high or to connect it to a (microcontroller) input (with no mention of a pull resistor). Is this pin required to be pulled in both directions or does it have an internal pull-down or...?
3) If one wasn't interested in the output (Energysense) function of the pin, would it be acceptable to connect the pin to a microcontroller GPIO pin (always configured as an output) through a series R? If so, what value R would be recommended?
Thank you.