TMP442 datasheet(12/57 Pages) TI2

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7.4 Device Functional Modes

The device can be configured to operate in different modes of operation through the configuration register or the

filter and alert mode register.

7.4.1 Interrupt and Comparator Mode

The ALERT pin of the device can be programmed into two different ALERT output modes. In the interrupt mode,

the device asserts the ALERT pin if the temperature exceeds the limits set by the temperature limit registers.

After the Alert Status is read and interrupt bits cleared, the ALERT pin is deasserted. In Comparator Mode, the

device asserts the ALERT pin if the measured temperature exceeds the limits and clears when the temperature

returns below the limits.

7.4.1.1 Interrupt Mode

When the Alert Mode Setting bit in the Configuration Register is set to 0, the Alert Mode is set to Interrupt 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. In this mode, the TMP4719 sets

the ALERT mask bit of the Configuration Register during a read of the Status Register if any flag in the Status

triggering until the controller has reset the ALERT mask bit (write 0 to the Alert_MASK bit).

The ALERT High Status flags are set at the end of a conversion cycle when the measured temperature exceeds

a High Alert Limit register limit. There are separate High Limit values and status register flags for the remote

and local temperature measurements. The status register flags are only set to the respective temperature

measurements.

The ALERT Low Status flag is set at the end of a conversion cycle when the measured remote temperature is

below the Remote Low Alert Limit register limit. There are separate Low Limit values and status register flags

for the remote and local temperature measurements. The status register flags are only set to the respective

temperature measurements. Refer to Section 8.30 .

The Status Register limit flags are cleared after a read command of the Status Register from the controller and

are set again at the end of a preceding temperature conversion cycle if the measured temperature is outside the

set limits.

Figure 7-5 shows the behavior of the ALERT pin and flags while in Interrupt mode.

TMP4719

SBOSAJ7 – OCTOBER 2025

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