Enabling DAC | Telit Wireless Solutions GE863-PY, GE863-QUAD

GE863-QUAD

GE863-PY

1vv0300715 Rev. 1 - 19/09/06

11.1.2Enabling DAC

An AT command is available to use the DAC function.

The command is AT#DAC[=<enable>[,<value>]]

<value> - scale factor of the integrated output voltage (0..1023 - 10 bit precision) it must be present if <enable>=1

Refer to SW user guide or to GE863-QUAD / PY AT commands specification for the full description of this function.

NOTE: The DAC frequency is selected internally. D/A converter must not be used during

POWERSAVING.

11.1.3Low Pass Filter Example

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Telit Wireless Solutions GE863-PY, GE863-QUAD manual Enabling DAC, Low Pass Filter Example, Command is AT#DAC=enable,value

Contents

GE863-QUAD GE863-PY Hardware User Guide Contents 10.3 10.110.2 10.4 13.1 12.113.2 This document is relating to the following products Overview GE863 module connections PIN-OUT Pin Signal Function Internal Type Pull up Pin Signal Function Internal Type Pins Layout Hardware Commands Turning on the GE863-QUAD/PY Turning OFF the GE863-QUAD/PY Turning off of the device can be done in two ways Hardware Unconditional Reboot Hardware shutdown GE863-QUAD 1Power Supply Requirements Power SupplyGE863-QUAD/PY power requirements are 2General Design Rules Electrical design Guidelines 1.2 + 12V input Source Power Supply Design Guidelines An example of linear regulator with 5V input is Battery Source Power Supply Design Guidelines An example of switching regulator with 12V input is Battery Charge control Circuitry Design Guidelines Thermal Design Guidelines Power Supply PCB layout Guidelines Antenna GSM Antenna Requirements Serial Ports GSM Antenna installation GuidelinesGSM Antenna PCB line Guidelines Absolute Maximum Ratings -Not Functional Parameter Min Max Level Min Max 17-28-36 Ground 45-48-50-56 Signals in the Uart connector on the EVK areNumber Pad Number Clear to Send Output from the GE863-QUAD/PY that 2MODEM Serial Port 2 Python Debug It is available on the following pins3RS232 level translation An example of level translation circuitry of this kind is 5V Uart level translation GE863-QUAD Audio Section Overview GM863-GPS Echo canceller type Car kit hands-free Microphone Paths Characteristic and RequirementsEcho canceller type Handset + 20dB That means You can set GA= +20dB to use standard resistor values TIP environment consideration General Design Rules Other considerations Microphone Biasing Balanced Microphone Biasing Unbalanced Microphone Biasing GE863-QUAD Buffered Balanced Mic Microphone BufferingSample circuit can be Gain = RR604605 = RR607606 Buffer gain is given by the formula Buffered Unbalanced Single Ended Microphone Freq . = 2π * R719* C726 2π * R711* C727 Buffer bandwidth at -3dB shall be 4KHz GE863-QUAD Output Lines Speaker Short description Output Lines Characteristics SW volume level step Number of SW volume steps Noise Filtering Handset Earphone Design Hands-Free Earphone Low Power Design An example of internal Ear amplifier could be Car Kit Speakerphone Design Evaluation Kit for Telit Modules EVK2 Short Description 2 EVK2 Audio Lines Characteristics @ 350mW Data Integrity ESD Schematic SIM Supply Layout Using a Gpio Pad as Output Using a Gpio Pad as InputGeneral Purpose I/O 10.3Using the Alarm Output GPIO6 Using the Buzzer Output GPIO7 Description DAC and ADC section11.1DAC Converter Min Max Units Enabling DAC An AT command is available to use the DAC functionCommand is AT#DAC=enable,value Low Pass Filter Example Input Voltage range AD conversion Bits Resolution Using ADC Converter11.2ADC Converter Type Camera12.1Transchip Camera Sensitivity Lux Camera Interface Connectors Camera Physical Detail & Connector Camera Socket Connector Camera Board Module Main Block Diagram for supported cameras Schematic Diagrams for supported camera Example usage script for camera Camera setting shown here are the defaults onesTaking an reading a photo Mounting the GE863-QUAD / PY on the Application Board 13.2Module Finishing & Dimensions13.1General Surface finishing Ni/Au for all test pads Lead-free Alloy Recommended foot print for the application Stencil Debug of the GE863 in ProductionPCB pad Design Solder paste 13.2.6 GE863-QUAD / PY Solder Reflow Following is the recommended solder reflow profile GE863-QUAD Packing System Section A-A Modules orientation on tray Moisture Sensibility Conformity Assessment Issues Safety Recommandations 21/02/06 Document Change LogRevision Date Changes 19/09/06