UM1539 datasheet(12/46 Pages) STMICROELECTRONICS

Part #	UM1539

Description	STEVAL-IFS017V1 multi device temperature sensor and RTC demo

PDF	46 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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12 / 46 page

Getting started

UM1539

12/46

Doc ID 023106 Rev 1

Default state: alarm OFF

Temperature reaches above the over-limit temperature (Tos): alarm GLOWS

Temperature reaches below Thys: alarm OFF

On the motherboard there is an LED D5 which shows the alarm signal from the

#ALERT pin of the temperature sensor. In the case of alert, D5 glows, and as soon as

the alert signal goes OFF, D5 switches off.

There is a One-shot mode button present in the GUI which functions only for the

STTS75 sensor. One-shot mode puts the sensor into Shutdown mode and then goes

for a one-shot read of temperature. After One-shot mode, the shutdown pin of the

configuration register sets to '1'. To bring the sensor to Normal mode, write the

shutdown bit to '0'.

Frequency for I2C communication between the sensor and microcontroller can be set

either to 100 kHz or 400 kHz using the Radio button selection and Write button.

Figure 5.

GUI window for STTS75, STDS75, STLM75, STCN75 temperature sensors

UM1539 Datasheet(PDF) 12 Page - STMicroelectronics