GE864 Hardware User Guide 1vv0300694 Rev.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 This document is relating to the following products: GE864-QUAD 3990250648 GE864-PY 3990250650 Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 Contents 1 Overview ...........................................................................................................................7 2 GE864 Mechanical Dimensions ......................................................................................8 3 GE864 module connections ............................................................................................9 3.1 PIN-OUT.......................................................
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 9.2 OUTPUT LINES (Speaker) ....................................................................................................42 9.2.1 9.2.2 9.3 Short description............................................................................................................................ 42 Output Lines Characteristics..........................................................................................................
GE864 Hardware User Guide 12.1.7 12.1.8 12.2 1vv0300694 Rev.10 - 10/06/08 Solder paste................................................................................................................................... 63 GE864 Solder reflow...................................................................................................................... 64 Packing system ....................................................................................................................65 12.2.1 12.2.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 DISCLAIMER The information contained in this document is the proprietary information of Telit Communications S.p.A. and its affiliates (“TELIT”). The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Telit, is strictly prohibited.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 1 Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GE864-QUAD / PY 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.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 2 GE864 Mechanical Dimensions The Telit GE864 module overall dimension are: • • • Length: Width: Thickness: 30 mm 30 mm 2.9 mm Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 3 GE864 module connections 3.1 PIN-OUT Ball Signal I/O Function Internal PULL UP Type Audio H9 EAR_MT- AO Handset earphone signal output, phase - Audio G10 EAR_MT+ AO Handset earphone signal output, phase + Audio H10 EAR_HF+ AO Handsfree ear output, phase + Audio J10 EAR_HF- AO Handsfree ear output, phase - Audio J8 MIC_MT+ AI Handset mic.signal input; phase+ Audio G9 MIC_MT- AI Handset mic.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 Ball Signal I/O Function Internal PULL UP Type C7 DAC_OUT AO Digital/Analog converter output D/A J11 ADC_IN1 AI Analog/Digital converter input A/D H11 ADC_IN2 AI Analog/Digital converter input A/D G11 ADC_IN3 AI Analog/Digital converter input A/D Miscellaneous Functions A2 RESET* I Reset input E2 VRTC AO VRTC Backup capacitor Power D8 STAT_LED O Status indicator led CMOS 1.
GE864 Hardware User Guide 1vv0300694 Rev.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 Ball Signal I/O F2 - F3 - F4 - G6 - G7 - H4 - H7 - J4 - J6 - J7 - K9 - L5 - E5 - L7 - G5 - G3 - C6 - F8 - C5 - Function Internal PULL UP Type NOTE: RESERVED pins must not be connected NOTE: If not used, almost all pins should be left disconnected.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 3.1.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 AUDIO Signals balls SIM CARD interface balls TRACE Signals balls Prog. / data + Hw Flow Control signals balls DAC and ADC signals balls MISCELLANEOUS functions signals balls TELIT GPIO balls POWER SUPPLY VBATT balls POWER SUPPLY GND balls RESERVED Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 4 Hardware Commands 4.1 Turning ON the GE864-QUAD / PY To turn on the GE864-QUAD / PY the pad ON# must be tied low for at least 1 second and then released. The maximum current that can be drained from the ON# pad is 0,1 mA. A simple circuit to do it is: ON# R1 Q1 Power ON impulse R2 GND NOTE: don’t use any pull up resistor on the ON# line, it is internally pulled up.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10k For example: Let’s assume you need to drive the ON# pad with a totem pole output of a +3/5 V micro controller (uP_OUT1): 1s Let’s assume you need to drive the ON# pad directly with an ON/OFF button: Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 4.2 Turning OFF the GE864-QUAD / PY The turning off of the device can be done in three ways: • by software command (see GE864-QUAD / PY 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.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 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 GE864-QUAD / PY power regulator and improper functioning of the module. The line RESET# 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.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 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. 5.1 Power Supply Requirements POWER SUPPLY Nominal Supply Voltage Max Supply Voltage 3.8V 4.2 Supply Voltage Range 3.4 – 4.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 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.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 An example of linear regulator with 5V input is: 5.2.1.2 + 12V input Source Power Supply Design Guidelines • • • • • • • • The desired output for the power supply is 3.8V; hence due to the big difference between the input source and the desired output, a linear regulator is not suited and shall not be used.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 An example of switching regulator with 12V input is in the below schematic (it is split in 2 parts): Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 5.2.1.3 Battery Source Power Supply Design Guidelines • The desired nominal output for the power supply is 3.8V and the maximum voltage allowed is 4.2V, hence a single 3.7V Li-Ion cell battery type is suited for supplying the power to the Telit GE864-QUAD/PY module. The three cells Ni/Cd or Ni/MH 3,6 V Nom.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 5.2.1.4 Battery Charge control Circuitry Design Guidelines The charging process for Li-Ion Batteries can be divided into 4 phases: • Qualification and trickle charging • Fast charge 1 – constant current • Final charge – constant voltage or pulsed charging • Maintenance charge The qualification process consists in a battery voltage measure, indicating roughly its charge status.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 Last but not least, in some applications it is highly desired that the charging process restarts when the battery is discharged and its voltage drops below a certain threshold, GE864-QUAD/PY internal charger does it. As you can see, the charging process is not a trivial task to be done; moreover all these operations should start only if battery temperature is inside a charging range, usually 5°C – 45°C.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 5.2.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 5.2.3 Power Supply PCB layout Guidelines As seen on the electrical design guidelines the power supply shall have a low ESR capacitor on the output to cut the current peaks and a protection diode on the input to protect the supply from spikes and polarity inversion. The placement of these components is crucial for the correct working of the circuitry. A misplaced component can be useless or can even decrease the power supply performances.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 6 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. 6.
GE864 Hardware User Guide 1vv0300694 Rev.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 6.3 GSM Antenna – Installation Guidelines • • • • Install the antenna in a place covered by the GSM signal. The Antenna must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter; Antenna shall not be installed inside metal cases Antenna shall be installed also according Antenna manufacturer instructions.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 7 Logic level specifications Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels. The following table shows the logic level specifications used in the Telit GE864-QUAD / PY interface circuits: Absolute Maximum Ratings –Not Functional Parameter Min Max Input level on any digital pin when on Input voltage on analog pins when on -0.3V +3.6V -0.3V +3.0 V Operating Range – Interface levels (2.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 7.1 Reset signal Signal RESET Function Phone reset I/O I Bga Ball A2 RESET is used to reset the GE864-QUAD / PY modules. Whenever this signal is pulled low, the GE864QUAD / PY is reset. When the device is reset it stops any operation. After the release of the reset GE864-QUAD / PY is unconditionally shut down, without doing any detach operation from the network where it is registered.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 8 Serial Ports The serial port on the Telit GE864-QUAD/PY is the core of the interface between the module and OEM hardware. 2 serial ports are available on the module: • MODEM SERIAL PORT • MODEM SERIAL PORT 2 (DEBUG) 8.1 MODEM SERIAL PORT Several configurations can be designed for the serial port on the OEM hardware, but the most common are: • RS232 PC com port • Micro controller UART @ 2.
GE864 Hardware User Guide 1vv0300694 Rev.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 8.2 RS232 level translation In order to interface the Telit GE864 with a PC com port or a RS232 (EIA/TIA-232) application a level translator is required.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 An example of level translation circuitry of this kind is: The RS232 serial port lines are usually connected to a DB9 connector with the following layout: Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 8.3 5V UART level translation If the OEM application uses a microcontroller with a serial port (UART) that works at a voltage different from 2.8 – 3V, then a circuitry has to be provided to adapt the different levels of the two sets of signals. As for the RS232 translation there are a multitude of single chip translators.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 NOTE: The UART input line TXD (rx_uart) of the GE864-QUAD / PY is NOT internally pulled up with a resistor, so there may be the need to place an external 47KΩ pull-up resistor, either the DTR (dtr_uart) and RTS (rts_uart) input lines are not pulled up internally, so an external pull-up resistor of 47KΩ may be required. A power source of the internal interface voltage corresponding to the 2.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 9 Audio Section Overview 16 -12dBFS 16 8 audio2.skd The Base Band Chip of the GE864-QUAD / PY Telit Module provides two different audio blocks; both in transmit (Uplink) and in receive (Downlink) direction: “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 hardware line or by AT command.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 9.1 INPUT LINES (Microphone) 9.1.1 Short description The Telit GE864-QUAD / PY provides two audio paths in transmit section. Only one of the two paths can be active at a time, selectable by AXE hardware line or by AT command.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 9.1.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 9.2 OUTPUT LINES (Speaker) 9.2.1 Short description The Telit GE864-QUAD / PY provides two audio paths in receive section. Only one of the two paths can be active at a time, selectable by AXE hardware line or by AT command.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 9.2.
GE864 Hardware User Guide 1vv0300694 Rev.
GE864 Hardware User Guide 1vv0300694 Rev.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.1 GPIO Logic levels Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels. The following table shows the logic level specifications used in the GE864-QUAD/PY interface circuits: Absolute Maximum Ratings –Not Functional Parameter Min Max Input level on any -0.3V digital pin when on Input voltage on -0.3V analog pins when on +3.6V +3.0 V Operating Range – Interface levels (2.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.2 Using a GPIO Pad as INPUT The GPIO pads, when used as inputs, can be connected to a digital output of another device and report its status, provided this device has interface levels compatible with the 2.8V CMOS levels of the GPIO. If the digital output of the device to be connected with the GPIO input pad has interface levels different from the 2.8V CMOS, then it can be buffered with an open collector transistor with a 47K pull up to 2.8V. 10.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.4 Using the RF Transmission Control GPIO4 The GPIO4 pin, when configured as RF Transmission Control Input, permits to disable the Transmitter when the GPIO is set to Low by the application. In the design is necessary to add a pull up resistor (47K to PWRMON). 10.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.7 Using the Buzzer Output GPIO7 As Alternate Function, the GPIO7 is controlled by the firmware that depends on the function implemented internally. This setup places always the GPIO7 pin in OUTPUT direction and the corresponding function must be activated properly by AT#SRP command (refer to AT commands specification). Also in this case, the dummy value for the pin state can be both “0” or “1”.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.8 Magnetic Buzzer Concepts 10.8.1 Short Description A magnetic Buzzer is a sound-generating device with a coil located in the magnetic circuit consisting of a permanent magnet, an iron core, a high permeable metal disk, and a vibrating diaphragm. Drawing of the Magnetic Buzzer The disk and diaphragm are attracted to the core by the magnetic field.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.8.2 Frequency Behaviour The frequency behavior represents the effectiveness of the reproduction of the applied signals. Because its performance is related to a square driving waveform (whose amplitude varies from 0V to Vpp), if you modify the waveform (e.g. from square to sinus) the frequency response will change. 10.8.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.9 Using the Temperature Monitor Function 10.9.1 Short Description The Temperature Monitor is a function of the module that permits to control its internal temperature and if properly set (see the #TEMPMON command on AT Interface guide) it raise to High Logic level a GPIO when the maximum temperature is reached. 10.9.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.10 Indication of network service availability The STAT_LED pin status shows information on the network service availability and Call status. In the GE864 modules, the STAT_LED usually needs an external transistor to drive an external LED. Therefore, the status indicated in the following table is reversed with respect to the pin status.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 10.11 RTC Bypass out The VRTC pin brings out the Real Time Clock supply, which is separate from the rest of the digital part, allowing having only RTC going on when all the other parts of the device are off. To this power output a backup capacitor can be added in order to increase the RTC autonomy during power off of the battery. NO Devices must be powered from this pin. 10.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 11 DAC and ADC section 11.1 DAC Converter 11.1.1 Description The GE864-QUAD / PY module provides a Digital to Analog Converter. The signal (named DAC_OUT) is available on BGA Ball C7 of the GE864-QUAD / PY module and on pin 17 of PL102 on EVK2 Board (CS1152). The on board DAC is a 10-bit converter, able to generate a analogue value based a specific input in the range from 0 up to 1023.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 11.1.2 Enabling DAC An AT command is available to use the DAC function. The command is AT#DAC[=[,]] - scale factor of the integrated output voltage (0..1023 – 10 bit precision) it must be present if =1 Refer to SW User Guide or AT Commands Reference Guide 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.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 11.2 ADC Converter 11.2.1 Description The on board A/D are 11-bit converter. They 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. Input Voltage range AD conversion Resolution Min 0 - Max 2 11 <1 Units Volt bits mV The GE864-QUAD / PY module provides 3 Analog to Digital Converters.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12 Mounting the GE864 on your Board 12.1 General The Telit GE864 modules have been designed in order to be compliant with a standard lead-free SMT process. 12.1.1 Module finishing & dimensions Pin A1 Lead-free Alloy: Surface finishing Sn/Ag/Cu for all solder pads Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12.1.2 Recommended foot print for the application (GE864) Top View Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12.1.3 Suggested Inhibit Area In order to easily rework the GE864 is suggested to consider on the application a 1.5mm Inhibit area around the module: 1.5mm 1.5mm Top View It is also suggested, as common rule for an SMT component, to avoid having a mechanical part of the application in direct contact with the module. Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12.1.4 Debug of the GE864 in production To test and debug the mounting of the GE864, we strongly recommend to foreseen test pads on the host PCB, in order to check the connection between the GE864 itself and the application and to test the performance of the module connecting it with an external computer.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12.1.6 PCB pad design Non solder mask defined” (NSMD) type is recommended for the solder pads on the PCB. Recommendations for PCB pad dimensions Ball pitch [mm] Solder resist opening diameter A [mm] Metal pad diameter B [mm] 2,5 1,150 1 ± 0.05 Placement of microvias not covered by solder resist is not recommended inside the “Solder resist opening”, unless the microvia carry the same signal of the pad itself.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 Holes in pad are allowed only for blind holes and not for through holes. Recommendations for PCB pad surfaces: Finish Layer thickness [µm] Electro-less Ni / 3 –7 / Immersion Au 0.05 – 0.15 Properties good solder ability protection, high shear force values The PCB must be able to resist the higher temperatures which are occurring at the lead-free process. This issue should be discussed with the PCB-supplier.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12.1.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12.2 Packing system The Telit GE864 modules are packaged on trays of 20 pieces each. This is especially suitable for the GE864 according to SMT processes for pick & place movement requirements. Section A-A The size of the tray is: 329 x 176mm NOTE: These trays can withstand at the maximum temperature of 65° C. Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 12.2.1 GE864 orientation on the tray 12.2.2 Moisture sensibility The level of moisture sensibility of GE864 module is “3”, in according with standard IPC/JEDEC J-STD020, take care all the relatives requirements for using this kind of components. Reproduction forbidden without Telit Communications S.p.A.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 13 Conformity Assessment Issues The GE864-QUAD / PY module is assessed to be conform to the R&TTE Directive as stand-alone products, so If the module is installed in conformance with Dai Telecom 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.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 14 SAFETY RECOMMANDATIONS READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required.
GE864 Hardware User Guide 1vv0300694 Rev.10 - 10/06/08 15 Document Change Log Revision Date ISSUE#0 ISSUE #1 ISSUE #2 ISSUE #3 12/06/06 22/11/05 19/12/05 07/02/06 ISSUE #4 07/09/06 ISSUE #5 03/10/06 ISSUE #6 ISSUE #7 23/10/06 08/02/07 ISSUE #8 07/06/07 ISSUE #9 19/06/07 ISSUE #10 10/06/08 Changes Release First ISSUE# 0 Added notice on page 4. Added Paragr.
