GE864 Hardware User Guide

1vv0300694 Rev.10 - 10/06/08

8 Serial Ports

The serial port on the Telit GE864-QUAD/PY is the core of the interface between the module and OEM hardware.

2 serial ports are available on the module:

MODEM SERIAL PORT

MODEM SERIAL PORT 2 (DEBUG)

8.1 MODEM SERIAL PORT

Several configurations can be designed for the serial port on the OEM hardware, but the most common are:

RS232 PC com port

Micro controller UART @ 2.8V – 3V (Universal Asynchronous Receive Transmit)

Micro controller UART@ 5V or other voltages different from 2.8V

Depending from the type of serial port on the OEM hardware a level translator circuit may be needed to make the system work. The only configuration that doesn’t need a level translation is the 2.8V UART.

The serial port on the GE864-QUAD/PY is a +2.8V UART with all the 7 RS232 signals. It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels. The levels for the GE864- QUAD/PY UART are the CMOS levels:

Absolute Maximum Ratings –Not Functional

ParameterMin Max

Input level on any

 

-0.3V

 

+3.6V

digital pad when on

 

 

 

 

 

 

 

 

 

Input voltage on

 

-0.3V

 

+3.0 V

analog pads when on

 

 

 

 

Operating Range – Interface levels (2.8V CMOS)

Level

 

 

Min

 

Max

 

 

 

 

 

 

 

 

 

 

 

 

Input high level

VIH

 

2.1V

 

3.3V

 

 

 

 

 

 

 

 

 

 

 

 

Input low level

VIL

 

0V

 

0.5V

 

 

 

 

 

Output high level VOH

 

2.2V

 

3.0V

 

 

 

 

 

 

Output low level

VOL

 

0V

 

0.35V

 

 

 

 

 

 

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Telit Wireless Solutions GE864 manual Serial Ports, Absolute Maximum Ratings -Not Functional ParameterMin Max

GE864 specifications

The Telit Wireless Solutions GE864 is a compact yet robust cellular module designed for a wide range of M2M (Machine-to-Machine) applications. As part of the Telit family, the GE864 is particularly notable for its small form factor, reliability, and versatility, making it an ideal choice for various industries including automotive, healthcare, and utilities.

One of the standout features of the GE864 is its integrated GPRS capabilities, allowing devices to connect to cellular networks seamlessly. With a maximum data rate of 85.6 kbps for downlink and 42.8 kbps for uplink, this module facilitates efficient data transmission, suitable for applications that require real-time data monitoring and control.

The GE864 supports multiple frequency bands, ensuring global compatibility. It can operate on GSM/GPRS networks, enhancing its usability across different regions. This multi-band support allows developers to deploy their solutions in diverse markets without modifying the hardware, thus saving both time and resources.

Power management is another critical area where the GE864 shines. The module comes equipped with advanced power-saving features, allowing it to operate effectively in battery-powered applications. Notable features include sleep modes and intelligent power management protocols that help extend battery life while maintaining reliable connectivity.

In terms of physical specifications, the GE864 has a compact design, measuring only 29x38 mm, which is essential for integration into space-constrained environments. This makes it particularly well-suited for applications in remote monitoring, asset tracking, and utility metering.

The module supports a range of interfaces, including UART, USB, and I2C, providing developers with the flexibility to connect various peripheral devices and sensors. This versatility enables the creation of customized solutions tailored to specific application needs.

Furthermore, the GE864 is designed to meet rigorous quality and durability standards, making it suitable for use in harsh environments. Its resilience to extreme temperatures and vibrations ensures dependable performance in challenging conditions, which is often a requirement in industrial and automotive applications.

In summary, the Telit Wireless Solutions GE864 is a feature-rich cellular module that combines compact design with robust performance and versatility. Its advanced connectivity options, efficient power management, and reliable operation make it an invaluable asset for businesses looking to develop innovative M2M solutions. Whether it’s for smart cities, telematics, or healthcare applications, the GE864 is engineered to meet the demands of today's connected world.