GE863-PRO3Hardware User Guide

1vv0300773a Rev. 0 - 24/01/08

5 Power Supply

The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances, hence read carefully the requirements and the guidelines that will follow for a proper design.

In the GE863-PRO3the power supply inputs of the GSM/GPRS engine and the ARM processor part have been kept separate, VBATT is the input for the GSM/GPRS part, VBATT2 is the input for ARM. It is possible to connect together the two power inputs since they have compatible ranges, but if it is desired the two power supplies can be kept separate.

The only power supply in common between the ARM and GSM/GPRS engine is the RTC voltage which is generated by the GSM/GPRS engine from VBATT power source and supplies both the GSM RTC and the ARM VDDBU part including the shutdown controller, RTC, 32 KHz oscillator. For this reason if it is planned to remove VBATT power supply, then a backup battery shall be provided on VTRC pin that guarantees that VRTC is still available.

NOTE: if you plan to remove VBATT power source, then you must provide an appropriate backup battery/capacitor on the VRTC pin in order to be able to turn on properly the ARM part when supplying VBATT2 only power pin.

5.1 GSM Power Supply Requirements

POWER SUPPLY

Nominal Supply Voltage

3.8

V

Max Supply Voltage

4.2

V

Supply voltage range

3.4

V - 4.2 V

GE863-PRO3GSM Engine

Mode

Average (mA)

 

IDLE mode

AT+CFUN=1

24,0

AT+CFUN=4

22,0

 

 

AT+CFUN=0 or

7,20 / 3,561

AT+CFUN=5

 

 

 

 

RX mode

1 slot in downlink

53,0

2 slot in downlink

66,0

3 slot in downlink

79,0

4 slot in downlink

89,0

Mode description

Stand by mode; no call in progress

Normal mode: full functionality of the module

Disabled TX and RX; module is not registered on the network

Power saving: CFUN=0 module registered on the network and can

receive voice call or an SMS; but it is not possible to send AT commands; module wakes up with an unsolicited code (call or SMS) or rising RTS line. CFUN=5 full functionality with power saving; module registered on the network can receive incoming calls and SMS

GSM Receiving data mode

1Worst/best case depends on network configuration and is not under module control

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Telit Wireless Solutions 1vv0300773a manual GSM Power Supply Requirements, AT+CFUN=1, AT+CFUN=4, AT+CFUN=5

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.

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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.

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