UM1539 datasheet(11/46 Pages) STMICROELECTRONICS

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UM1539

Getting started

Doc ID 023106 Rev 1

11/46

Figure 4.

List of temperature sensors in the GUI

1.2.10

GUI window for STTS75, STDS75, STLM75 and STCN75 sensors

The STTS75, STLM75, STDS75, and STCN75 sensors are supported by a single GUI

window, as shown in Figure 5. There are radio buttons for selecting one of four possible

sensors (STTS75, STLM75, STDS75, and STCN75).

Below are the steps for operating these sensors using the GUI:

Select one of the radio buttons present in the “Select the temperature sensor” area in

the GUI. This enables the GUI for one of the selected sensors

(STTS75/STLM75/STDS75/STCN75).

Choose the address from the dropdown menu of the “Choose Address” block. If the

address selected from the GUI is the same as configured onboard (as described in

Section 1.2.4), the remaining part of the GUI is enabled; or else an error message

appears in the GUI, as shown in Figure 6. In the case of an error message, check the

correct address from the GUI.

Configure the different registers of the sensor and observe the behavior in the GUI and

on the board. The bits of the configuration register can be selected in the GUI and can

be written by pressing the ‘Write’ button.

The slider for over-limit and hysteresis can be used to select the values for

oversaturation and hysteresis registers of the sensor.

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

from the sensor.

The “Loop” button is used to continuously read the temperature value from the sensor

and display the same in the GUI.

ALARMS is seen in the GUI only when the Once or Loop button is pressed. Pressing

Once reads the instantaneous temperature value and latches the instantaneous

ALARM condition in the GUI. Pressing the Loop button continuously monitors the

temperature and the ALARM condition and displays the same in the GUI. Stopping the

Loop button latches the last measured value of temperature and the last ALARM

condition in the GUI. This alarm is used to indicate the behavior of the OS pin output of

the temperature sensor.

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