TMP116 datasheet(15/46 Pages) TI2

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High temperature limit

Low temperature limit

Temperature

Temperature conversions

HIGH_Alert Status Flag

LOW_Alert Status Flag

Configuration Register I

2C Read

ALERT pin (POL = 0)

SMBus Alert Response Command

TMP116, TMP116N

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SBOS740A – MAY 2017 – REVISED MAY 2019

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Device Functional Modes (continued)

7.4.2.1 Alert Mode

When the T/nA bit in the configuration register is set to 0, the device is in alert mode. In this mode, the device

compares the conversion result at the end of every conversion with the values in the low limit register and high

limit register. If the temperature result exceeds the value in the high limit register, the HIGH_Alert status flag in

the configuration register is set. On the other hand, if the temperature result is lower than the value in the low

limit register, the LOW_Alert status flag in the configuration register is set. As shown in Figure 23, in alert mode

the status flags can be cleared by performing an I2C read of the configuration register.

Configuring the device in alert mode also affects the behaviour of the ALERT pin. In this mode, the device

asserts the ALERT pin when either the HIGH_Alert or the LOW_Alert status flag is set as shown in Figure 23.

The ALERT pin can be deasserted by either performing an I2C read of the configuration register (which also

clears the status flags) or by performing an SMBus alert response command (see the SMBus Alert Function

section). The polarity of the ALERT pin can be changed by using the POL bit setting in the configuration register.

This mode effectively makes the device behave like a window limit detector and can be used in applications

where detecting if the temperature goes outside of the specified range is needed.

Figure 23. Alert Mode Timing Diagram

TMP116 Datasheet(PDF) 15 Page - Texas Instruments