Texas Instruments TMP102EVM, User Manual, Page: 15 / 22

www.ti.com
TMP102EVM Software Overview
5.2.5 Shutdown Mode
The TMP102 has a built-in shutdown mode that allows the device to stop consuming power. The
Shutdown mode selection box (illustrated in
Figure 16 ) can also be used to clear the Alert pin when the
Interrupt Mode (refer to Section 5.2.7 ) is selected. It is important to note that the TMP102 EVM cannot
perform temperature conversions while in Shutdown mode.
Figure 16. Active and Shutdown Mode
5.2.6 Extended Mode
The TMP102EVM has two modes for storing converted temperature data as shown in Figure 17 :
Extended Mode and Normal Mode. Normal mode gives the Temperature, T
LOW
, and T
HIGH
Registers 12 bits
of accuracy. By changing to Extended Mode, the user increases to 13 bits of accuracy and adjusts the
full-scale value of the three registers from 120
° C to 150 ° C. It is important to note that adding an additional
bit of accuracy also changes the current T
HIGH
and T
LOW
values; these values must then be reset to the
user's original, intended values after adjusting the Extended Mode drop-down box.
Figure 17. Extended Mode and Normal Mode
5.2.7 Thermostat Mode
Thermostat Mode, in the Configuration box, allows the user to designate how the TMP102 Alert pin
behaves when the Temperature Register exceeds the T
HIGH
Register. When the TMP102EVM software is
in Comparator Mode, the Alert pin triggers if the temperature measured by the TMP102 exceeds the T
HIGH
Register for the set amount of faults, described in the Fault Queue (see Section 5.2.9 ). Once the Alert pin
has been triggered, it remains triggered until the temperature measured by the TMP102 falls below the
T
LOW
Register value for the set amount of faults.
15 SBOU114 – August 2011 TMP102EVM Evaluation Board and Software Tutorial
Submit Documentation Feedback
Copyright © 2011, Texas Instruments Incorporated