User's Manual

2.2.2 I/O Connector Electrical Characteristics
I
2.2.2.1 I/O Connector Pin Assignment
Pin
No
Name Description
Default @
Low est
current
mode
I/O @
Phone
Logic Condition
1 GND Ground Low O System ground
2 NC NA NA NA NA
3 PHONE_PWR
3.8 volts +/-5% supply
voltage to phone module
High I
The application provides the main
power of the phone module