Gpio (General Purpose Input/Output) Connector; Rs232 9-Pin Functions Of The Female End Connector - Multitech MultiModem iCell MTCMR-E1 User Manual

GPIO (General Purpose Input/Output) 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 Digital Input, 24 Volt tolerent.
●
Pin 2 Digital Input, 24 Volt tolerent.
●
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, 2
Input Voltage
Parameter
Input Low-level Voltage
Input High-level Voltage
Pins 3, 4
Input Voltage
Parameter
Input Low-level Voltage
Input High-level Voltage
Pins 3, 4
Output Voltage
Parameter
Output Low-level Voltage
Output High-level Voltage
Pins 3, 4
Output Current
Parameter
Output Current
Pins 1, 2 are digital input only.
Pin 5 is an analog input only.
Pins 1-5 contain ESD protection.

RS232 9-Pin Functions of the Female End Connector

Multi-Tech Systems, Inc. MultiModem iCell User Guide
Description
DIO 0
DIO 1
DIO 2 / ADC 0
DIO 3 / ADC 1
ADC 2
Gnd
External Power
Signal IN/OUT
Pin 1 CD O
Pin 2 RX O
Pin 3 TX I
Pin 4 DTR I
Pin 5 GND --
Pin 6 DSR O
Pin 7 RTS I
Pin 8 CTS O
Pin 9 RI O
GPIO 6-PinConnector
Min Max Units
0.3 1.0 V
3.0 24 V
Min Max Units
-0.3 0.8 V
2.0 5.5 V
Min Max Units
0.0 0.4 V
2.9 3.3 V
Min Max Units
2 mA
Serial Cable
Female Connector
Chapter 1
11