UM1539 datasheet(13/46 Pages) STMICROELECTRONICS

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UM1539

Getting started

Doc ID 023106 Rev 1

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Figure 6.

Wrong address message on GUI

1.2.11

GUI window for STTS424E02 temperature sensor

The STTS424E02 is a simple digital temperature sensor with an on-chip 2 Kb EEPROM.

Below are the steps to operate the STTS424E02 sensor in GUI mode:

Plug the daughter card of the STTS424E02 on the motherboard.

Select the sensor option for the STTS424E02 from the GUI, as shown in Figure 4.

Select the STTS424E02 sensor Radio button from sensor options in the “Select the

Temperature Sensor” area in the GUI. On selecting the STTS424E02 sensor, the “Edit

EEPROM” option also gets enabled in the GUI.

Check the address from the “Choose Address” area. If the address configured on the

board (explained in Section 1.2.6) is different from the address selected from the GUI,

an error message appears on the GUI. In the case of an error, re-check the address

with the correct option.

All the registers show the default readings at first selection.

Press the Loop button to continuously read the temperature in the GUI.

Configure the different registers through the GUI and observe the behavior of the

sensor. The bits of the configuration register can be individually selected using the GUI.

Sliders for “Upper Temp Register”, “Lower Temp Register” and “Critical Temp Register”

can be used to separately configure the upper boundary, lower boundary and critical

limit for temperatures. Press the Write button individually for all the three limits to write

the value inside the sensor registers.

The Once button is used to read the instantaneous value of temperature value from the

sensor.

10. The Loop button is used to continuously read the temperature value from the sensor

and display the same in the GUI.

11. There are 3 different alarms supported by this sensor:

Below alarm window (BAW):

This alarm occurs when the measured temperature goes below the temperature

setting performed in the alarm temperature lower boundary register (lower temp

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