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User Manual May 2019 | Page 17/49
USER MANUAL
Scavenger Transmitter Module
STM 330 / STM 331 STM 331U / STM 332U / STM 333U
(Stepcode DE and later)
3.3
Simplified device block diagram
SET
GND
CW_1
CW_0
OCC
CP_1
CP_0
LRN
VDD
Whip or helical
antenna
UVDDext
RESET
BALUN
Presence Signal
(every 100th,
every 10th,
every cyclic wake-up
or SW defined)
Spontaneous
wake-up
Cyclic Wake-up
(every 1 s ,10 s , 100 s,
or SW defined)
A/D
Power management
Micro
Controller
RF Transmitter
868.3 MHz (STM 33x)
315.0 MHz (STM 330C)
902.875 MHz (STM 33xU)
DOLPHIN
EO3000I
16MHz Oscillator
SWPWR
Energy
Storage
VCHAR
VGC
Solar Cell
LRN button
Transmit
Indicator
HSM