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GC864-QUAD-C2
Hardware User's Manual
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Telit Wireless Solutions GC864-QUAD-C2, GC864-PY-C2 Hardware User's Manual

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GC864-QUAD-C2 / PY-C2 Hardware User Guide
GC864-QUAD-C2 and GC864-PY-C2 Hardware User Guide 1vv0300744 Rev.1 - 24/10/06
GC864-QUAD-C2/PY-C2 Hardware User Guide
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This document is relating to the following products:
Model P/N
GC864-QUAD-C2
GC864-PY-C2
3990250681 3990250686
GC864-QUAD-C2/PY-C2 Hardware User Guide
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Contents
1 Overview.........................................................................................................................................5
2 Mechanical Dimensions..............................................................................................................6
3 Board to Board connector PINOUT connections ......................................................................7
4 Hardware Commands....................................................................................................................9
4.1 Turning ON the GC864-C2 .....................................................................................................9
4.2 Turning OFF the GC864-C2 .................................................................................................11
4.2.1 Hardware shutdown....................................................................................................................... 11
4.2.2 Hardware Unconditional Restart.................................................................................................... 11
5 Power Supply...............................................................................................................................13
6 General Design Rules..................................................................................................................14
7 Antenna ........................................................................................................................................15
8 Serial Port.....................................................................................................................................16
9 VAUX1 power output...................................................................................................................17
10 Audio Section Overview..............................................................................................................18
10.1 Audio Lines Characteristics ............................................................................................19
10.1.1 Microphone Paths Characteristic................................................................................................... 19
10.1.2 Ear Paths Characteristics .............................................................................................................. 19
10.2 Microphone Biasing..........................................................................................................20
10.2.1 On-board default biasing ............................................................................................................... 20
10.2.2 External biasing network................................................................................................................ 21
10.3 EVK2: the Evaluation Kit for Telit Modules ....................................................................21
11 SIM Design Guides ......................................................................................................................22
12 General Purpose I/O ....................................................................................................................23
13 DAC and ADC section .................................................................................................................24
14 Conformity Assessment Issues .................................................................................................25
15 SAFETY RECOMMANDATIONS..................................................................................................26
16 Document Change Log ...............................................................................................................27
GC864-QUAD-C2/PY-C2 Hardware User Guide
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DISCLAIMER
The information contained in this document is proprietary information of Telit Communications S.p.A.
Telit Communications S.p.A. makes every effort to ensure the quality of the information it makes available. Notwithstanding the foregoing, Telit Communications S.p.A. does not make any warranty as to the information contained herein, and does not accept any liability for any injury, loss or damage of any kind incurred by use of or reliance upon the information.
Telit Communications S.p.A. disclaims any and all responsibility for the application of the devices characterized in this document, and notes that the application of the device must comply with the safety standards of the applicable country, and where applicable, with the relevant wiring rules.
Telit Communications S.p.A. reserves the right to make modifications, additions and deletions to this document at any time and without notice.
© 2006 Telit Communications S.p.A.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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1 Overview
The aim of this document is the description of some hardware solutions useful for developing a
product with the Telit GC864-C2 module.
In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced. Obviously this document cannot embrace the whole hardware solutions and products that may be designed. The wrong solutions to be avoided shall be considered as mandatory, while the suggested hardware configurations shall not be considered mandatory, instead the information given shall be used as a guide and a starting point for properly developing your product with the Telit GC864-C2 module. For further hardware details that may not be explained in this document refer to the Telit GC864-C2 Product Description document where all the hardware information is reported.
NOTICE
GC864-C2
GC864-C
2
GC864-C2
GC864-C2
GC864-C
2
GC864-C2
GC864-C2
The information presented in this document is believed to be accurate and reliable. However, no respo nsibility is assumed by Telit Communication S.p.A. for its use, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Telit Communication S.p.A. other than for circuitry embodied in Telit products. This document is subject to change without notice.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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2 Mechanical Dimensions
The Telit GC864-C2 module overall dimension are:
• Length: 50 mm
• Width: 33 mm
• Thickness: 5.6 mm
• Weight: 14gr
GC864-QUAD-C2/PY-C2 Hardware User Guide
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3 Board to Board connector PINOUT
connections
Pin Signal Type Function
1 VBATT DC voltage Power 2 GND DC voltage Power 3 VBATT DC voltage Power 4 GND DC voltage Power 5 VBATT DC voltage Power 6 GND DC voltage Power 7 VBATT DC voltage Power 8 GND DC voltage Power
9 VBATT DC voltage Power 10 GND DC voltage Power 11 VBATT DC voltage Power 12 GND DC voltage Power 13 NC Don’t connect 14 ON_OFF* DC voltage Input command for switching power ON or OFF 15 SIMVCC DC voltage External SIM Power 16 SIMIN DC voltage External SIM inside detector 17 SIMRST DC voltage External SIM Reset 18 SIMIO 3V Only External SIM Data I/O 19 SIMCLK Digital Signal External SIM Clock 20 DAC_OUT Digital Output Digital/ Analog converter output 21 TGPIO_01 Digital In/Out General purpose 22 TGPIO_02/JDR Digital In/Out General purpose 23 TGPIO_03 Digital In/Out General purpose 24 TGPIO_04 Digital In/Out General purpose 25 VRTC DC voltage VRTC Backup capacitor 26 ADC_IN1 AC input Analog/Digital converter input 27 ADC_IN2 AC input Analog/Digital converter input 28 ADC_IN3 AC input Analog/Digital converter input 29 - - RESERVED 30 - - RESERVED 31 TGPIO_07/BUZZER Digital In/Out General purpose/Buzzer 32 OUT Digital Output General purpose 33 LED DC voltage Status indicator led 34 VAUX1 DC voltage Power output for external accessories 35 TGPIO_05/RFTXMON Digital In/Out General purpose 36 C125/RING Digital Output Output for Ring indicator signal (RI) to DTE 37 C108/DTR Digital Input Input for Data terminal ready signal (DTR) from DTE 38 C109/DCD Digital Output Output for Data carrier detect signal (DCD) to DTE
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39 C105/RTS Digital Input Input for Request to send signal (RTS) from DTE 40 C106/CTS Digital Output Output for Clear to send signal (CTS) to DTE 41 C103/TXD Digital Input Serial data input (TXD) from DTE 42 C104/RXD Digital Output Serial data output to DTE 43 NC Don’t connect 44 NC Don’t connect 45 RX_Trace Digital Input RX Data for debug monitor 46 TX_Trace Digital Output TX Data for debug monitor 47 - - RESERVED 48 - - RESERVED 49 - - RESERVED 50 - - RESERVED 51 - - RESERVED 52 - - RESERVED 53 MIC_MT+ DEC Audio Input Handset microphone signal input; phase+, 54 MIC_MT- DEC Audio Input Handset microphone signal input; phase-, 55 EAR_MT+ Audio Output Handset earphone signal output, phase + 56 EAR_MT- Audio Output Handset earphone signal output, phase ­57 EAR_HF+ DEC Audio Output Handsfree ear output, phase + 58 - - RESERVED 59 MIC_HF+ DEC Audio Input Handsfree microphone input; phase + 60 ANALOG GND AC voltage
For more information about balls position and pinout of GE864 module, please refer to 1vv0300694 GE-864 Hardware User Guide
GC864-QUAD-C2/PY-C2 Hardware User Guide
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4 Hardware Commands
4.1 Turning ON the GC864-C2
To turn on the GC864-C2 the ON# line must be tied low for at least 1 second and then released. The maximum current that can be drained from the ON# line is 0,1 mA.
A simple circuit to do it is:
NOTE: don't use any pull up resistor on the ON# line, it is internally pulled up. Using pull up resistor may bring to latch up problems on the GC864-C2 power regulator and improper power on/off of the module. The ON# line must be connected only in open collector configuration.
NOTE: In this document all the lines that are inverted, hence have active low signals are labeled with a name that ends with a "#" or with a bar over the name.
ON#
Power ON impulse
GND
R1
R2
Q1
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For example:
1- Let's assume you need to drive the ON# line with a totem pole output of a +3/5 V microcontroller
(uP_OUT1):
1s
2- Let's assume you need to drive directly the ON# line inserting the forecast ON/OFF button PL101:
GC864-QUAD-C2/PY-C2 Hardware User Guide
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4.2 Turning OFF the GC864-C2
The turning off of the device can be done in three ways:
• by software command (refer to 1vv0300745 Rev1 GC864-QUAD-C2 / PY-C2 Software User
Guide)
• by hardware shutdown
• by Hardware Unconditional Restart
When the device is shut down by software command or by hardware shutdown, it issues to the network a detach request that informs the network that the device will not be reachable any more.
4.2.1 Hardware shutdown
To turn OFF the module GC864-C2 the ON# line (pin2-PL101/pin14-PL103) must be tied low for at
least 2 seconds and then released. The same circuitry and timing for the power on shall be used.
4.2.2 Hardware Unconditional Restart
The device shuts down after the release of the ON# pad.
To unconditionally restart the module GC864-C2, the RESET# line (pin2-PL102) must be tied low for
at least 200 milliseconds and then released.
The maximum current that can be drained from the RESET# line is 0,15 mA.
A simple circuit to do it is:
RESET#
Unconditional Restart impulse
GND
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NOTE: don't use any pull up resistor on the RESET# line nor any totem pole digital output. Using pull up resistor may bring to latch up problems on the GC864-C2 power regulator and improper functioning of the module. The RESET# line must be connected only in open collector configuration.
TIP: The unconditional hardware Restart should be always implemented on the boards and software should use it as an emergency exit procedure.
For example:
1- Let's assume you need to drive the RESET# line with a totem pole output of a +3/5 V
microcontroller (uP_OUT2):
Reset Signal Operating levels:
Signal Min Max
RESET Input high 2.2V* 3.3V
RESET Input low 0V 0.2V
* this signal is internally pulled up so the pin can be left floating if not used.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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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.
For more information please refer to 1vv0300694 GE864 Hardware User Guide
GC864-QUAD-C2/PY-C2 Hardware User Guide
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6 General Design Rules
The principal guidelines for the Power Supply Design embrace three different design steps:
- electrical design
- thermal design
- PCB layout.
For more information about Electrical Design, Thermal Design, Power Supply PCB layout, please refer
to 1vv0300694 GE864 Hardware User Guide.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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7 Antenna
The antenna connection and board layout design are the most important part in the full product design and they strongly reflect on the product overall performances, hence read carefully and follow the requirements and the guidelines for a proper design. For more information about GSM Antenna Requirements, PCB line and Installation Guidelines, please
refer to 1vv0300694 GE864 Hardware User Guide.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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8 Serial Port
The serial port on the Telit GC864-C2 is the core of the interface between the module and OEM hardware. Several configurations can be designed for the serial port on the OEM hardware, but the most common are:
• RS232 PC com port
• microcontroller UART @ 2.8V - 3V (Universal Asynchronous Receive Transmit)
• microcontroller UART@ 5V or other voltages different from 2.8V
For more information about Serial port levels, signals and connections, pinout and level translation
please refer to 1vv0300694 GE864 Hardware User Guide.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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9 VAUX1 power output
A regulated power supply output is provided in order to supply small devices from module. This output is active when the module is ON and goes off when module is shut down.
For more information about VAUX1 source please refer to 1vv0300694 GE864 Hardware User Guide.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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10 Audio Section Overview
The Base Band Chip of the GC864-C2 Telit Module provides two different audio blocks, both in
transmit (Uplink) and in receive (Downlink) direction as shown in the see picture below:
“MT lines” should be used for handset function, “HF lines” is suited for hands -free function (car kit).
These two blocks can be active only one at a time, selectable by AXE HW line or by dedicated AT
command.
Keep in mind that MT lines work as Differential Input/Output circuits, while HF lines work as Single
Ended Input/Output circuits. For these reasons they have also different audio characteristics.
0,33mV
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GC864-QUAD-C2/PY-C2 Hardware User Guide
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10.1 Audio Lines Characteristics
10.1.1 Microphone Paths Characteristic
“Mic_MT” 1
st
differential microphone path
• line coupling AC
• line type balanced
• coupling capacitor ≥ 100nF
• differential input resistance 50kΩ
• differential input voltage ≤ 1,03V
pp
(365mV
rms
)
• microphone nominal sensitivity -45 dBV
rms
/Pa
• analog gain suggested + 20dB
• echo canceller type handset
“Mic_HF” 2
nd
single ended microphone path
• line coupling AC
• line type single ended
• coupling capacitor ≥ 100nF
• differential input resistance 50kΩ
• differential input voltage ≤ 65mV
pp
(23mV
rms
)
• microphone nominal sensitivity -45 dBV
rms
/Pa
• analog gain suggested
+10dB
• echo canceller type car kit hands-free
10.1.2 Ear Paths Characteristics
“Ear_MT” Differential Line-out Drivers Path
• line coupling: DC
• line type: bridged
• output load resistance : ≥ 14 Ω
• internal output resistance: 4 Ω (typical)
• signal bandwidth: 150 - 4000 Hz @ -3 dB
• max. differential output voltage 1310 mV
rms
(typ, open circuit)
• differential output voltage 328mVrms /16 Ω @ -12dBFS
• SW volume level step - 2 dB
• number of SW volume steps 10
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“Ear_HF” Power Buffers path
• line coupling: AC
• line type: single ended
• output load resistance : ≥ 14 Ω
• internal output resistance: 4 Ω ( >1,7 Ω )
• signal bandwidth: 150 - 4000 Hz @ -3 dB
• max. single ended output voltage 656 mV
rms
(typ, open circuit)
• SW volume level step - 2 dB
• number of SW volume steps 10
10.2 Microphone Biasing
The electret microphones usually needs a biasing voltage to work properly. You can use the on-board circuitry on external biasing network.
10.2.1 On-board default biasing
In order to eliminate the noise coming from the power lines, the microphone bias voltage is obtained
from a voltage source filtered by a capacitor multiply circuit (Q101) and connected through R104/R105 to MIC_MT+ line or R104/R106 to MIC_HF+ line.
The voltage source comes from a dedicated voltage regulator (U102), supplied directly by VBATT. You can use also the inner VAUX1 source; in this case U102 must be removed and R112 inserted.
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10.2.2 External biasing network
If the microphone bias voltage is generated externally, then R104/R105/R106 must not be mounted
Please refer to 1vv0300694 GE864 Hardware User Guide for more information and application notes
about: Microphone and Earpiece Electrical Characteristics, Requirements and General Design Rules.
10.3 EVK2: the Evaluation Kit for Telit Modules
Telit supplies the Evaluation Kit for Telit modules (EVK2) to assist the designer to develop his own
applications based on GC864-C2 module.
The EVK2 is composed by a mother board and a dedicated Telit module Interface Board, on which the
module is fitted: it provides a fully functional solution for a complete data/phone application. The motherboard has multiple power supply possibilities .It is equipped with SIM card housing, RS 232 serial port level translator, direct USB1.1 connection, and two audio input/output paths.
Please refer to 1vv0300694 GE864 Hardware User Guide and 1vv0300704 EVK2 User Guide for
more information about its use, audio characteristics and application notes.
Furthermore, the EVK2 allows to benefit of the special features of the new Telit Module versions with
PYTHON Script Interpreter.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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11 SIM Design Guides
In all Telit modules there are five pins for SIM card holder connection.
Please refer to 1vv0300694 GE864 Hardware User Guide for more information about SIM
Supply, EMI/EMC, ESD and application notes.
GC864-QUAD-C2/PY-C2 Hardware User Guide
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12 General Purpose I/O
The general purpose I/O pads can be configured to act in three different ways:
• input
• output
• alternate function (internally controlled)
The Input pads can only be read and report the digital value (high or low) present on the pad at the
read time;
The Output pads can only be written or queried and set the value of the pad output; the alternate
function pad is internally controlled by the GC864-C2 firmware and acts depending on the function implemented.
The "alternate function" are supported only by GPIO5 (which can be configured to become a RF Transmission monitor output reflecting the RF transmission activation) and GPIO7 (which can be
configured to become a Buzzer output pin).
For more information about level specifications and GPIO setting, please refer to 1vv0300694 GE864 Hardware User Guide and 1vv0300745 GC864-C2 Software User Guide.
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13 DAC and ADC section
The GC864-C2 module provides:
• three 11-bit Analog to Digital Converters on board (CS1230 , PL103 pin26-pin27-pin28) .
The ADCs are able to read a voltage level in the range of 0÷2 volts applied on the ADC pin input, store and convert it into 11 bit word.
• one 10 bit Digital to Analog Converter.
This DAC is able to generate a analogue value based a specific input in the range from 0 up to 1023 , with a suitable external low-pass filter .
For more information about level specifications, the use of GPIO Pad as INPUT/OUTPUT, please refer
to 1vv0300694 GE864 Hardware User Guide.
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14 Conformity Assessment Issues
The GC864-C2 module is assessed to be conform to the R&TTE Directive as stand-alone products, so
if the module is installed in conformance with Telit Communications SpA installation instructions require no further evaluation under Article 3.2 of the R&TTE Directive and do not require further
involvement of a R&TTE Directive Notified Body for the final product.
In all other cases, or if the manufacturer of the final product is in doubt then the equipment integrating
the radio module must be assessed against Article 3.2 of the R&TTE Directive.
In all cases assessment of the final product must be made against the Essential requirements of the R&TTE Directive Articles 3.1(a) and (b), safety and EMC respectively, and any relevant Article 3.3 requirements.
The GC864-C2 module is conform with the following European Union Directives:
• R&TTE Directive 1999/5/EC (Radio Equipment & Telecommunications Terminal Equipments)
• Low Voltage Directive 73/23/EEC and product safety
• Directive 89/336/EEC for conformity for EMC
In order to satisfy the essential requisite of the R&TTE 99/5/EC directive, the GC864-C2 module is compliant with the following standards:
• GSM (Radio Spectrum). Standard: EN 301 511 and 3GPP 51.010-1
• EMC (Electromagnetic Compatibility). Standards: EN 301 489-1 and EN 301 489-7
• LVD (Low Voltage Directive) Standards: EN 60 950
In the Hardware User Guide and Software User Guide all the information you may need for developing a product meeting the R&TTE Directive is included.
The GC864-C2 module is conform with the following US Directives:
• Use of RF Spectrum. Standards: FCC 47 Part 24 (GSM 1900)
• EMC (Electromagnetic Compatibility). Standards: FCC47 Part 15
To meet the FCC's RF exposure rules and regulations:
• The system antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all the persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
• The system antenna(s) used for this module must not exceed 3 dBi for mobile and fixed or mobile operating configurations.
• Users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance.
Manufacturers of mobile, fixed or portable devices incorporating this module are advised to clarify any regulatory questions and to have their complete product tested and approved for FCC compliance.
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15 SAFETY RECOMMANDATIONS
READ CAREFULLY
Be sure the use of this product is allowed in the country and in the environment required. The use of this product may be dangerous and has to be avoided in the following areas:
Where it can interfere with other electronic devices in environments such as hospitals, airports,
aircrafts, etc
Where there is risk of explosion such as gasoline stations, oil refineries, etc
It is responsibility of the user to enforce the country regulation and the specific environment regulation.
Do not disassemble the product; any mark of tampering will compromise the warranty validity.
We recommend following the instructions of the hardware user guides for a correct wiring of the product. The product has to be supplied with a stabilized voltage source and the wiring has to be conforming to the security and fire prevention regulations.
The product has to be handled with care, avoiding any contact with the pins because electrostatic discharges may damage the product itself. Same cautions have to be taken for the SIM, checking carefully the instruction for its use. Do not insert or remove the SIM when the product is in power saving mode.
The system integrator is responsible of the functioning of the final product; therefore, care has to be taken to the external components of the module, as well as of any project or installation issue, because the risk of disturbing the GSM network or external devices or having impact on the security. Should there be any doubt, please refer to the technical documentation and the regulations in force.
Every module has to be equipped with a proper antenna with specific characteristics. The antenna has to be installed with care in order to avoid any interference with other electronic devices and has to guarantee a minimum distance from the body (20 cm). In case of this requirement cannot be satisfied, the system integrator has to assess the final product against the SAR regulation.
The European Community provides some Directives for the electronic equipments introduced on the market. All the relevant information’s are available on the European Community website:
http://europa.eu.int/comm/enterprise/rtte/dir99-5.htm
The text of the Directive 99/05 regarding telecommunication equipments is available, while the applicable Directives (Low Voltage and EMC) are available at:
http://europa.eu.int/comm/enterprise/electr_equipment/index_en.htm
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16 Document Change Log
RReevviissiioonn DDaattee
CChhaannggeess
ISSUE#0 29/09/06 Release First ISSUE# 0
ISSUE#1 24/10/06 Added product GC864-PY-C2 in the document
Pag.2 Added product name and P/N for 3990250686 version 3 Board to Board Connector Pinout connections: updated table,changed signal,type and function of pin 29 and pin 30
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