User Manual

USER MANUAL V1.05
© 2013 EnOcean | www.enocean.com STM 330 / STM 331 / STM 330C / STM 332U / STM 333U User Manual V1.10 | Page 13/33
STM 330 / STM 331 / STM 330C / STM 332U / STM 333U
For I/O pins configured as analog pins the IOVDD voltage level is not relevant! See
also 3.3.2.
3.3.2 Analog and digital inputs
Parameter
Conditions / Notes
Min
Typ
Max
Units
Analog Input Mode
Measurement range
Single ended
Internal reference RVDD/2
0.07
RVDD-
0.07
V
Interpreted as
7
0x00
0xFF
Input coupling
DC
Input impedance
Single ended against
GND @ 1 kHz
10
M
Input capacitance
Single ended against
GND @ 1 kHz
10
pF
Parameter
Conditions / Notes
Min
Typ
Max
Units
Digital Input Mode
Input HIGH voltage
2/3
IOVDD
V
Input LOW voltage
1/3
IOVDD
V
Pull up resistor
@IOVDD=1.7 … 1.9 V
90
132
200
k
3.3.3 Temperature sensor
Parameter
Conditions / Notes
Min
Typ
Max
Units
Measurement range
0
40
°C
Accuracy
17 - 27 °C
0 - 40
0.5
1
K
K
7
For measurement of set point with external set point dial
IOVDD
ADIO0 ADIO1 ADIO2 ADIO3 ADIO4 ADIO5 ADIO6 ADIO7 SCSEDIO0 SCLKDIO1 WSDADIO2 RSDADIO3
If configured as digital I/O