Datasheet MAX30102 (Maxim) - 12

MAX30102 High-Sensitivity Pulse Oximeter and Heart-Rate Sensor for Wearable Health
Interrupt Status (0x00–0x01) REGISTER B7 B6 B5 B4 B3 B2 B1 B0 REG POR ADDR STATE R/W
Interrupt Status 1 A_FULL PPG_RDY ALC_OVF PWR_ RDY 0x00 0X00 R Interrupt DIE_ Status 2 TEMP_RDY 0x01 0x00 R Whenever an interrupt is triggered, the MAX30102 pulls the active-low interrupt pin into its low state until the interrupt is cleared.
A_FULL: FIFO Almost Full Flag
In SpO2 and HR modes, this interrupt triggers when the FIFO write pointer has a certain number of free spaces remaining. The trigger number can be set by the FIFO_A_FULL[3:0] register. The interrupt is cleared by reading the Interrupt Status 1 register (0x00).
PPG_RDY: New FIFO Data Ready
In SpO2 and HR modes, this interrupt triggers when there is a new sample in the data FIFO. The interrupt is cleared by reading the Interrupt Status 1 register (0x00), or by reading the FIFO_DATA register.
ALC_OVF: Ambient Light Cancellation Overflow
This interrupt triggers when the ambient light cancellation function of the SpO2/HR photodiode has reached its maximum limit, and therefore, ambient light is affecting the output of the ADC. The interrupt is cleared by reading the Interrupt Status 1 register (0x00).
PWR_RDY: Power Ready Flag
On power-up or after a brownout condition, when the supply voltage VDD transitions from below the undervoltage lockout (UVLO) voltage to above the UVLO voltage, a power-ready interrupt is triggered to signal that the module is powered-up and ready to collect data.
DIE_TEMP_RDY: Internal Temperature Ready Flag
When an internal die temperature conversion is finished, this interrupt is triggered so the processor can read the temperature data registers. The interrupt is cleared by reading either the Interrupt Status 2 register (0x01) or the TFRAC register (0x20). www.maximintegrated.com Maxim Integrated │ 12