TMP112EVM Software Overview
5.2.11
Alert Configuration (T
LOW
and T
HIGH
)
The
Alert Config
box has three objects that make up the main functionality of the TMP112 Alert pin (the
Alert bit, T
LOW
register, and T
HIGH
register), as
shows. The green LED within the
Alert Config
box
lights up when the T
HIGH
register is exceeded and the Alert pin is activated. This LED is denoted as an
Alert because of the default configuration. The Alert pin can also be switched to an active high, as shown
in
, if so desired by the user.
Figure 22. 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
.
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.
5.2.12
Registers Tab
The registers tab displays the individual register setting for the TMP112 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 23. 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
SBOU144 – August 2014
TMP112EVM Evaluation Board and Software Tutorial
Copyright © 2014, Texas Instruments Incorporated
