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GPIO (General Purpose Input/Output) 6-Pin Connector
The GPIO pins are configured using Universal IP (UIP) AT Commands. Refer to the Universal IP (UIP) AT Command
Reference Guide on your MultiModem CD. The following table explains the GPIO functions:
Pin
Number
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
The GPIO pins can be configured independent of each other.
●
Pin 1 can be configured as either Digital Input (5V tolerant TTL/CMOS levels) or Digital Output (3.3V High)
●
Pin 2 can be configured as either Digital Input (5V tolerant TTL/CMOS levels) or Digital Output (3.3V High)
●
Pin 3 can be configured as either Digital Input (5V tolerant TTL/CMOS levels) or Digital Output (3.3V High)
or as an ADC input (0 to 3.3V rail)
●
Pin 4 can be configured as either Digital Input (5V tolerant TTL/CMOS levels) or Digital Output (3.3V High)
or as an ADC input (0 to 3.3V rail)
●
Pin 5 is configured as an ADC input (0 to 3.3V rail)
●
Pin 6 is GND and must be connected to the ground of the attached device
GPIO DC Characteristics
Pins 1-5
Parameter
Input Low-level Voltage
Input High-level Voltage
Output Low-level Voltage
Output High-level Voltage
Pins 1,2,3,4
Output Current
Parameter
Output Current
Pin 5 is an ADC input only
Pins 1-5 contain ESD protection
AT Command Information
AT commands for the MultiModem iCells are published in separate Reference Guides included on the MultiModem
CD and posted on the Multi-Tech web site.
Multi-Tech Systems, Inc. MultiModem iCell Intelligent Wireless Modem User Guide
Description
DIO 0
DIO 1
DIO 2 / ADC 0
DIO 3 / ADC 1
ADC 2
Gnd
Min
-0.3
2.0
0.0
2.9
Min
Chapter 1 – Product Description and Specifications
GPIO 6-Pin
Connector
Max
Units
0.8
V
5.5
V
0.4
V
3.3
V
Max
Units
2
mA
11
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