Table of Contents
Advertisement
Reference Guide
Figure 5.
Power Supply Connector
Refer to the following table for the pin description of the power supply connector.
Table 2.
Power Supply Connector Pin Description
Pin #
Signal
1
GPIO25/INT1
2
GPIO35
3
Vref
4
Reserved
5
Reserved
6
GND
7
DC-IN
8
ON/OFF
9
Reserved
10
Reserved
The input voltage range (DC-IN) is from 4.75V to 32V, with a typical operating
voltage of 13.2V.
Caution:
Pins 1, 2, 3, 4, 5, 8, 9 and 10 are low voltage interfaces. It is strictly prohibited to connect these pins
to any power supply as there is a risk of damaging the modem.
3.1.1.1.
General Purpose Input/Output
The modem has two external GPIO ports:
• GPIO35
and
• GPIO25;
as well as a voltage reference line, Vref.
Vref sets the reference voltage of the input or output of the two GPIOs. Leaving it
unconnected sets the GPIO level at 2.3V – 2.6V by default. It is strongly
recommended to connect to the required GPIOs' output voltage (2.8V ~ 15V).
Description
General purpose input/output or Interrupt
General purpose input/output
Voltage reference for the GPIOs
Reserved
Reserved
Ground
Input Supply for the modem (4.75V to 32V)
Control pin to power OFF the modem
Reserved
Reserved
Rev 1.0
Interfaces
1/27/14
16
16
Advertisement
Table of Contents
