Dolphin STM 431J, User Manual

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USER MANUAL
STM 431J – Scavenger Transmitter Module
© 2017 EnOcean | www.enocean.com STM 431J User Manual | v2.0 | Nov 2017 | Page 12/ 34
2.3 Pin description and operational characteristics
STM 43xJ
Hardware
Symbol
STM 43xJ
Firmware
Symbol
Function Characteristics
GND GND Ground connection
VDD VDD Supply voltage 2.1 V – 5.0 V; Start-up voltage: 2.6 V
Maximum ripple: see 2.6
Not available at pin header.
Supply for pro-
gramming I/F
Recommended supply voltage for
programming 3V
VCHAR VCHAR Charging input Input for an external energy harvester or a
battery. See 0.
Supply for pro-
gramming I/F if
VDD cannot be
used.
4
Recommended supply voltage for
programming 3.3V – 3.6 V
VGC VGC Voltage Gold Cap Connection of additional external energy
storage possible. See 0.
SWPWR
(= switched
DVDD of
Dolphin V4)
SWPWR DVDD supply volt-
age regulator out-
put switched via
transistor con-
trolled by Dolphin
V4 ADIO5 pin.
1.8 V. Output current: max. 5 mA.
Supply for external circuitry, available
while not in deep sleep mode. SWPWR is
switched on 0.25 ms before sampling of
inputs and is switched off afterwards.
UVDDext
(=UVDD of
Dolphin V4
with 1.8MΩ
in series)
UVDDext Ultra low power
supply voltage
regulator output
Not for supply of external circuitry!
For use with WAKE pins only, see section
3.1. Limited to max. 1 µA output current
by internal 1.8 MΩ resistor!
IOVDD (not
available at
pin connec-
tor)
IOVDD GPIO supply volt-
age
Internal connection to Dolphin V4 DVDD
(typ. 1.8 V)
See 0
RESET RESET Reset input
Programming I/F
Active high reset (1.8 V)
Fixed internal 10 kΩ pull-down.
PROG_EN PROG_EN Programming I/F HIGH: programming mode active
LOW: operating mode
Digital input, fixed internal 10 kΩ pull-
down.
ADIO0 SET Analog input For connection of an external set point
dial. See 3.3
ADIO1 Not used Internal pull-up; do not connect
ADIO2 Not used Internal pull-up; do not connect
4
E.g. if module shall be programmed or configured via pin connector.
If a bed of nails fixture for programming is available VDD should be used instead of VCHAR.