User's Manual
Table Of Contents
3. Pin assignments
4. Pin description
Pin number
Pin name
Description
1, 7, 13, 17, 23
to 32 & 35
GND1 to 15
Ground
18, 33
VDD
Power input
2
OPTO_BIAS
Phototransistor power; connects to collector of phototransistor
6
OPTO_IN
Phototransistor signal; connects to emitter of phototransistor, which is connected
to ground via a bias resistor (typically 100k)
3
LED_GREEN
Green LED open-drain output (connect to cathode of LED)
4
LED_RED
Red LED open-drain output (connect to cathode of LED)
5
POWER_EN
Active-high output for boost DCDC enable. Is driven high when the module
requires a 2.5-3.3v power supply, which is generally when WiFi is active. This pin
has an internal pulldown.
34
VREF
ADC reference voltage input. If unused, connect to VDD
electric imp, inc
electric imp imp002 specification (confidential, not for distribution)" 4