Pin no.
Name
Description
Type from user side
Voltage level
15
3.3VDC
3.3 V power supply (to
supply user board)
Power supply
3.3 V referenced to
GND
16
LED2
LED n°2 command
Output
VDD/GND
17
5VDC
5 V power supply (to
supply user board)
Power supply
5 V referenced to GND
18
Power Time +
Power or timer duration
increase push button
Input
VDD/GND
19
Power Time -
Power or timer duration
decrease push button
Input
VDD/GND
20
LED4
LED n°4 command
Output
VDD/GND
4.2
MODE switch voltage
MODE switch (SW201) is a three-positions switch, and each position is connected to different resistors which
change voltage on the MODE signal (see
UM2304
MODE switch voltage
UM2304
-
Rev 3
page 23/46