When bit 0 of the Remote Diode Temperature Filter and Alert Mode Setting register is set to 1, the Alert Mode is set to Comparator mode. In this mode, the ALERT pin is asserted at the end of a conversion cycle if the measured temperature exceeds a High Alert Limit or goes below a Low Alert Limit defined in the limit registers. The ALERT pin deasserts at the end of proceeding conversion cycle if the measured temperature is equal to or below a High Alert limit and equal to or above a Low Alert limit defined in the limit registers.

The ALERT High Status flags will set at the end of a conversion cycle when the measured temperature exceeds a High Alert Limit register limit and clear at the end of a conversion cycle when the measured temperature is equal to or below the High Limit value. There are separate High Limit values and status register flags for the remote and local temperature measurements. The status register flags will only set or clear to the respective temperature measurements.

The Remote ALERT Low Status flag will set at the end of a conversion cycle when the measured temperature is below the Remote Low Alert Limit register limit and will clear at the end of a conversion cycle when the measured remote temperature is equal to or above the low Limit value.

Figure 8-6 shows the behavior of the ALERT pin and flags while in Comparator mode.

Figure 8-6 Alert Comparator Mode Timing Diagram