SNAU250 November   2020 HDC2010 , HDC2021 , HDC2022 , HDC2080

 

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3.4 Interrupt Pin Functionality

Interrupt pin functionality is shared between Data Ready and Event Interrupt functionality. Enabling the interrupt pin for Data Ready (DRDY) can help reduce the power consumption of the system as the MCU/CPU will enter sleep when the HDC device is making temperature and humidity measurements, and awaken the MCU/CPU for communication through it's DRDY interrupt pin. To verify that data is ready after manual conversion, the DRDY/INT pin should be monitored. If monitoring this pin is not possible, it is recommended that the user program the device for auto mode and program the sampling rate of the device to perform periodic automatic conversions. Additionally, the DRDY/INT pin can be set for interrupt capability based on input alarm thresholds for either temperature or humidity measurements.