JAJSMG0C june 2021 – december 2022 HDC3020 , HDC3021 , HDC3022
PRODUCTION DATA
Use the ALERT output pin to determine if the HDC302x records a measurement that indicates either the temperature and/or relative humidity result is outside of a programmed "comfort zone". The pin sends a hardware interrupt based on the programmable non-volatile thresholds for both temperature and humidity.
The ALERT output pin serves to drive circuit blocks where software monitoring is not feasible. Examples include enabling a power switch to start a dehumidifier, or to initiate a thermal shutdown. Additionally, the ALERT pin can minimize power drain by enabling a microcontroller to remain in deep sleep until environmental conditions require the microcontroller to wake up and perform debug and corrective actions.