Texas Instruments TMP102EVM, User Manual, Page: 17 / 22

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TMP102EVM Software Overview
5.2.10 Alert Configuration (T
LOW
and T
HIGH
)
The Alert Config box has three objects that make up the main functionality of the TMP102 Alert pin, as
Figure 21 shows: the Alert bit, T
LOW
Register, and T
HIGH
Register. The green LED within the Alert Config
box lights up when the T
HIGH
Register has been exceeded and the Alert pin has been activated. It is
denoted as a Alert because of the default configuration. The Alert pin can also be switched to an active
high, as shown in
Section 5.2.4 , if so desired by the user.
Figure 21. Alert Config Box
The T
LOW
input box allows the user to set when the alert pin is cleared. When the measured value in the
temperature register falls below the T
LOW
threshold, the Alert pin clears, depending on which thermostat
mode is selected. For more information on the behavior of the Thermostat mode, see Section 5.2.7 .
The T
HIGH
input box allows the user to set when the Alert pin is triggered. When the measured value in the
temperature register exceeds the T
HIGH
threshold, the Alert pin triggers until the temperature returns to a
value below the T
LOW
threshold, depending on the thermostat mode selected.
5.2.11 Registers Tab
The registers tab displays the individual register setting for the TMP102 sensors. For more information on
the individual registers and the bit meanings, simply highlight the desired register and hit the Help with
Reg button shown in
Figure 22 .
Figure 22. Register Tab
The Registers tab also includes the Dig_Bits table. The Dig_Bits table allows the user to monitor and
change individual bits by highlighting the desired register and toggling the bit controls beneath it.
NOTE: Only the bits that can be written within a given register can be toggled.
17 SBOU114 – August 2011 TMP102EVM Evaluation Board and Software Tutorial
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