User's Manual

USER MANUAL 1.34
© 2013 EnOcean | www.enocean.com STM 300 / STM 300C / STM 300U User Manual | Page 10/42
STM 300 / STM 300C / STM 300U
regarding the module hardware, such as pin out, layout recommendations, charging cir-
cuitry, antenna options, and approvals.
3.3 Pin description and operational characteristics
STM 300
Hardware
Symbol
STM 300
pin #
STM 300
Firmware
Symbol
Function
Characteristics
GND
1, 5, 7,
17, 24,
26, 28,
31
GND
Ground connec-
tion
Must be connected to GND
VDD
2
VDD
Supply voltage
2.1 V – 4.5 V;
Start-up voltage: 2.6 V
Maximum ripple: see 3.6
RVDD
8
V_OUT
RF supply voltage
regulator output
1.8 V. Output current: max. 10 mA.
See 4.4!
Supply for external circuitry, avail-
able while not in deep sleep mode.
DVDD
25
DVDD
Digital supply
voltage regulator
output
1.8 V. Output current: max. 5 mA
Supply for external circuitry, avail-
able
while not in deep sleep mode.
UVDD
32
UVDD
Ultra low power
supply voltage
regulator output
Not for supply of external circuitry!
For use with WAKE pins, see section
4.3.
Max. 1 µA output current!
VDDLIM
3
VDDLIM
Supply voltage
limiter input
Limitation voltage: 4.5 V
Maximum shunting current: 50 mA
IOVDD
23
IOVDD
GPIO supply volt-
age
Must be connected to desired inter-
face supply voltage as specified in
3.5, e.g. to DVDD. See also 3.3.1
RESET
27
RESET
Reset input
Programming I/F
Active high reset (1.8 V)
Connect external 10 kΩ pull-down.
PROG_EN
18
PROG_EN
Programming I/F
HIGH: programming mode active
LOW: operating mode
Digital input, connect external 10 kΩ
pull-down.
ADIO0
9
AD_0
Analog input
Input read ~2 ms after wake-up.
Resolution 8 bit (default) or 10 bit.
See also 3.3.2.
ADIO1
10
AD_1
Analog input
Input read ~2 ms after wake-up.
Resolution 8 bit (default) or 6 bit.
See also 3.3.2.
ADIO2
11
AD_2
Analog input
Input read ~2 ms after wake-up.
Resolution 8 bit.
See also 3.3.2.