UM1539 datasheet(20/46 Pages) STMICROELECTRONICS

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Getting started

UM1539

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Doc ID 023106 Rev 1

and is seen as ACK glowing in the GUI. For timeout delay greater than 29 milliseconds,

the device returns NACK to communication and is seen as NACK glowing in the GUI.

This ACK and NACK is the response from the sensor to the I2C communication along

with the delay in between.

12. I2C speed can be selected to be either 100 kHz or 400 kHz using the Radio buttons

and Write button.

Figure 12.

GUI Window for STTS2002

1.2.16

GUI window for STTS2002 temperature sensor EEPROM

The STTS2002 sensor has an on-chip 2 Kb EEPROM. For the STTS2002 sensor selected

in the GUI, the “Edit EEPROM” button gets enabled. The EEPROM window opens on

clicking this Edit EEPROM button.

The steps for using the EEPROM of the STTS2002 sensor are as follows:

Check the address of the EEPROM. The last 3 bits of the EEPROM address are

derived from the last 3 bits of the temperature sensor address.

For the correct address checked, the GUI for the EEPROM gets enabled with editable

area for 256 bytes.

The EEPROM area of the STTS2002 is divided into 2 sections:

Lower half between 0x00 - 0x7F (first 128 bytes)

Upper half between 0x80 - 0XFF (last 128 bytes)

The EEPROM supports permanent write protection for the data written inside the lower

half of memory using the PSWP command. The EEPROM window has a READ PSWP

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