The device has a user-programmable EEPROM that can be used for two purposes:

• Storing power-on reset (POR) values of the high limit register, low limit register, conversion cycle time, averaging mode, conversion mode (continuous or shutdown mode), alert function mode (alert or therm mode), and alert polarity
• Storing four 16-bit locations for general-purpose use. See the EEPROM[4:1] registers for more information.

On reset, the device goes through a POR sequence that loads the values programmed in the EEPROM into the respective register map locations. This process takes approximately 1.5ms. When the power-up sequence is complete, the device starts operating in accordance to the configuration parameters that are loaded from the EEPROM. Any I²C writes performed during this initial POR period to the limit registers or the configuration register are ignored. I²C read transactions can still be performed with the device during the power-up period. While the POR sequence is being executed, the EEPROM_Busy status flag in the EEPROM unlock register is set.

During production, the EEPROM in the TMP119 is programmed with reset values as shown in Table 8-2. The Programming the EEPROM section describes how to change these values. A unique ID is also programmed in the general-purpose EEPROM locations during production. This unique ID is used to support NIST traceability. The TMP119 units are 100% tested on a production setup that is NIST traceable and verified with equipment that is calibrated to ISO/IEC 17025 accredited standards. Only reprogram the general-purpose EEPROM[4:1] locations if NIST traceability is not desired.