GE863-PRO3Hardware User Guide

 

 

 

1vv0300773a Rev. 0 - 24/01/08

GSM TX and RX mode

 

GSM Sending data mode

 

Min power level

78,0

 

 

Max power level

200,0

 

 

 

GPRS (class

10) TX and RX mode

 

GPRS Sending data mode

 

Min power level

124,0

 

 

Max power level

371,0

 

 

 

The GSM system is made in a way that the RF transmission is not continuous, else it is packed into bursts at a base frequency of about 216 Hz, the relative current peaks can be as high as about 2A. Therefore the power supply has to be designed in order to withstand with these current peaks without big voltage drops; this means that both the electrical design and the board layout must be designed for this current flow. If the layout of the PCB is not well designed a strong noise floor is generated on the ground and the supply; this will reflect on all the audio paths producing an audible annoying noise at 216 Hz; if the voltage drop during the peak current absorption is too much, then the device may even shutdown as a consequence of the supply voltage drop.

TIP: The electrical design for the Power supply should be made ensuring it will be capable of a peak current output of at least 2 A.

5.2 ARM Power Supply Requirements

 

 

 

 

 

 

POWER SUPPLY

 

 

 

 

 

 

Nominal Supply Voltage

3.8 V

 

 

 

 

 

 

Operating Supply voltage range

3.4 V - 4.2 V

 

 

 

 

 

 

Absolute Maximum voltage range

3.30 – 4.5 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GE863-PRO3

 

Mode

Typical Average (mA)

 

 

Mode description

 

Off

 

 

< 2 μA (TBD)

 

 

 

 

 

Full Speed

 

 

 

140 (TBD)

 

ARM is operational at full speed 200MHz CPU Clock , Main Clock

 

 

 

 

 

 

100 MHz and all peripherals active

 

 

 

 

 

 

 

 

 

Slow Clocking

 

 

1 (TBD)

 

ARM is running on slow clock with peripherals disabled

5.3 VRTC Backup supply

The RTC of the GSM/GPRS engine and the RTC & Shutdown controller of the ARM part are supplied by VRTC. This voltage supply is generated by a low quiescent current regulator inside the module that takes its power from VBATT pins. Since this voltage supply is needed to correctly boot the ARM part, if it is planned to remove the VBATT supply and still turn on the ARM part supplied by VBATT2, then an appropriate power supply must be provided to the VRTC pin.

To obtain several working years for the Real Time Clock of the GSM/GPRS engine and the RTC, 32KHz oscillator & Shutdown controller of the ARM part without VBATT power supply voltage, it is needed to make use of a lithium primary battery to supply the RTC circuits in the Telit Module.

The operative voltage for VRTC is lower than the voltage of primary lithium battery (3V nominal). It is therefore necessary to put a LDO voltage regulator in the circuit.

Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved

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Telit Wireless Solutions 1vv0300773a manual ARM Power Supply Requirements, Vrtc Backup supply
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1vv0300773a specifications

Telit Wireless Solutions 1VV0300773A is an advanced cellular module specifically designed for a wide range of IoT applications. This module is part of Telit’s extensive portfolio, which is renowned for its reliability and innovation in the wireless communication space. The 1VV0300773A module stands out due to its compact design and robust performance, making it an ideal choice for developers looking to integrate cellular connectivity into their projects.

One of the main features of the 1VV0300773A is its support for multiple communication protocols, which enhances its versatility. The module is designed to support various LTE CAT M1 and NB-IoT networks. These technologies are critical for low-power wide-area network (LPWAN) applications, allowing devices to stay connected over long distances while consuming minimal energy. This is particularly beneficial for battery-operated devices in sectors like smart agriculture, smart cities, and industrial IoT.

The module is equipped with a powerful ARM Cortex-M3 processor, which enables efficient data processing and facilitates complex computations required for many IoT applications. Additionally, it features a comprehensive set of interfaces, including UART, GPIO, and I2C, enabling easy integration with various sensors and peripherals. This modularity ensures that developers can customize their applications based on specific business needs.

Security is another crucial aspect of the 1VV0300773A module. Telit incorporates advanced security features including secure boot, data encryption, and a secure element, ensuring that data transmitted over cellular networks is protected against unauthorized access. This commitment to security is vital in today’s increasingly connected world, where data privacy is a top concern.

Furthermore, the 1VV0300773A module supports extensive over-the-air firmware updates, allowing manufacturers to deploy updates and enhancements seamlessly. This capability extends the lifecycle of devices in the field and ensures that they can adapt to new requirements and security standards over time.

In summary, Telit Wireless Solutions 1VV0300773A offers a blend of advanced features, robust technologies, and essential characteristics tailored for the rapidly evolving IoT landscape. Its combination of multi-network support, secure communication, and efficient processing makes it a standout choice for developers and enterprises looking to enhance their connectivity solutions.
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