User's Manual

USER MANUA
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V0.60
© 2010 EnOcean | www.enocean.com STM 330 / STM 330C User Manual V0.60 | Page 21
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STM 330 / STM 330C
3.2 Temperature sensor
STM 330 provides an internal temperature sensor. The sensor is part of the EO3000I IC and
measures the chip temperature. Therefore it is important to provide a good thermal con-
nection of the IC to the environment by ensuring sufficient circulation of air inside the
housing. Only then the measurement will represent the temperature of the environment.
Heating of the chip due to its current consumption is negligible as the chip only consumes
200nA while in sleep mode.
Temperature measurement every second is not recommended as in this case effects of
heating of the chip might become visible.
3.3 Set point control and occupancy button
In order to control the set point, an external potentiometer has to be connected as shown
below. In addition this figure shows how to connect the occupancy button.
STM 330
SWPWR
GND
ADIO0
10k
OCC
UVDDext
Set Point Occupancy