Telit Wireless Solutions 1vv0300773a manual Using the Alarm Output, Using the Buzzer Output GPIO4

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GE863-PRO3Hardware User Guide

1vv0300773a Rev. 0 - 24/01/08

10.5 Using the Alarm Output

The GSM/GPRS engine GPIO pads, when configured as Alarm Output, can be controlled by the GE863-PRO3module and will rise when the alarm starts and fall after the issue of a dedicated AT command.

This output can be used to power up the GE863-PRO3application processor at the alarm time, giving you the possibility to program a timely system wake-up to achieve some periodic actions and completely turn off both the application processor and the GE863-PRO3during sleep periods, dramatically reducing the sleep consumption to few μA.

In battery-powered devices this feature will greatly improve the autonomy of the device.

10.6 Using the Buzzer Output GPIO4

The GPIO4 pad, when configured as Buzzer Output, is controlled by the GE863-PRO3module and will drive with appropriate square waves a Buzzer driver.

This permits to your application to easily implement Buzzer feature with ringing tones or melody played at the call incoming, tone playing on SMS incoming or simply playing a tone or melody when needed by your application.

A sample interface scheme is included below to give you an idea of how to interface a Buzzer to the GPIO7:

NOTE: To correctly drive a buzzer a driver must be provided, its characteristics depend on the Buzzer and for them refer to your buzzer vendor.

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Contents GE863-PRO3Hardware User Guide Contents GE863-PRO 3 Hardware User Guide This document is relating to the following products Disclaimer Overview Telit GE863-PRO3module overall dimension are GE863-PRO3Mechanical DimensionsLength 41,4 mm Width 31,4 mm Thickness 3,6 mm GE863-PRO3module connections DTE GPIO7 / Rftxdisable GSM C2 Vbatt C3 VrtcC11 Simrst C12 Simio D1 Charge D2 VAUX1 D10 GND D11 Simvcc D12 Simclk E1 GND E2 PwrmonNrst Reset ARM PB8PB9 ON/OFF*-APPB0 PB2PB1 PB7Hdmb XIN32XOUT32 PA3VBATT2 Reserved GNDBalls Layout ARM Port IO multiplexing ARM PIO Controller a multiplexingARM PIO Controller B multiplexing ARM PIO Controller C multiplexing Hardware Commands Turning on the GE863-PRO3GSM/GPRS Engine10k +1,8/52Turning OFF the GE863-PRO3GSM/GPRS Engine Hardware Unconditional Reboot of GSM/GPRS EngineHardware shutdown Turning ON/OFF the GE863-PRO3ARM ON/OFF*-AP # GND Power Supply GSM Power Supply RequirementsAT+CFUN=1 AT+CFUN=4ARM Power Supply Requirements Vrtc Backup supplyGeneral Design Rules Electrical design GuidelinesSuggested circuit is 817A19A Seiko1.1 + 5V input Source Power Supply Design Guidelines 1.2 + 12V input Source Power Supply Design Guidelines Battery Source Power Supply Design Guidelines Battery Charge control Circuitry Design Guidelines GE863-PRO3Hardware User Guide Thermal Design Guidelines Power Supply PCB layout Guidelines Antenna GSM Antenna RequirementsGSM Antenna PCB line Guidelines 50 ohmGSM Antenna installation Guidelines Electro Magnetic Interference GuidelinesAbsolute Maximum Ratings -Not Functional Parameter Min Max Logic level specificationsOperating Range Interface levels Cmos Level Min Max GSM Gpio Current characteristics Level Typical Cmos 3.1V Current characteristics Level TypicalCmos 1.8V-A Current characteristics Level Typical Operating Range Interface levels Cmos Vrtc Level Min MaxPhone reset Signal FunctionSignal Min Max Serial Ports Modem Serial Port Modem Serial Port 2 DebugSignals of the GE863-PRO3GSM/GPRS engine serial port are RS232 level translation An example of level translation circuitry of this kind is GE863-PRO3Hardware User Guide Audio Section Overview Input Lines Microphone Short descriptionInput Lines Characteristics Micmt 1st differential microphone pathOutput Lines Speaker Output Lines Characteristics Earmt Differential Line-out Drivers Path Evaluation Kit for Telit GE863- PRO3 Modules 10 GSM/GPRS General Purpose I/O ON/OFFUsing a Gpio Pad as Input Using a Gpio Pad as OutputUsing the RF Transmission Control GPIO7 10.4Using the Rftxmon Output GPIO3Using the Alarm Output Using the Buzzer Output GPIO4LED status 10.7Indication of network service availabilityDevice Status Operating Range VAUX1 power supply 10.9VAUX1 power outputRTC Bypass out Mounting the GE863-PRO3on the Application Board 11.1GeneralStencil PCB pad DesignSolder paste 11.1.4 GE863-PRO3Solder Reflow Following is the recommended solder reflow profile3C/second max Packing System Section A-AModules orientation on tray Moisture Sensibility Conformity Assessment Issues Safety Recommandations Document Change Log Revision Date Changes
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