GE864-AUTO Hardware User Guide 1vv0300779 Rev.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 This document is relating to the following products: GE864-AUTO 3990250701 Reproduction forbidden without Telit Communications S.p.A.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 Contents 1 Overview ...........................................................................................................................6 2 GE864-AUTO Mechanical Dimensions ...........................................................................7 3 GE864-AUTO module connections .................................................................................8 3.1 PIN-OUT...............................................................
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 9.2 OUTPUT LINES (Speaker) ....................................................................................................40 9.2.1 9.2.2 Short description............................................................................................................................ 40 Output Lines Characteristics.......................................................................................................... 41 10 General Purpose I/O.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 1 Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GE864-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 2 GE864-AUTO Mechanical Dimensions The Telit GE864-AUTO module overall dimension are: • • • Length: Width: Thickness: 30 mm 30 mm 2.8 mm Reproduction forbidden without Telit Communications S.p.A.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 3 GE864-AUTO module connections 3.1 PIN-OUT Ball Signal I/O Function Internal PULL UP Type Audio F9 AXE I G8 MIC_HF+ AI G9 MIC_MT- AI G10 EAR_MT+ AO J8 MIC_MT+ AI J9 MIC_HF- AI J10 EAR_HF- AO Handsfree switching Handsfree mic. input; phase +, nom. level 3mVrms Handset mic.signal input; phase-, nom. level 50mVrms Handset earphone signal output, phase + Handset mic.signal input; phase+, nom. level 50mVrms Handsfree mic.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 Ball Signal I/O Function Internal PULL UP Type DAC and ADC 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 D8 STAT_LED O Status indicator led CMOS 1.8V E2 VRTC AO VRTC Power F3 32K_IN I 32.768 KHz Square Wave Input CMOS 1.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 Ball Signal I/O Function Internal PULL UP Type A11 GND - Ground Power F11 GND - Ground Power L11 GND - Ground Power RESERVED A3 A4 A5 A6 A7 A8 A9 A10 B1 B2 B4 B8 B9 B10 B11 C1 C2 C3 C4 C5 C6 C7 C8 C9 D1 D3 D5 E3 E4 E5 E8 E10 F2 F4 F5 F8 G1 G2 G3 G4 Reproduction forbidden without Telit Communications S.p.A.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 Ball Signal I/O Function Internal PULL UP Type G5 G6 G7 H4 H6 H7 J4 J6 J7 K9 K10 K11 L5 L7 L10 * Ref. to Digital Voice Interface Application Note 80000NT10004a. NOTE: RESERVED pins must not be connected NOTE: If not used, almost all pins should be left disconnected.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 3.1.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 AUDIO Signals balls SIM CARD interface balls TRACE Signals balls Prog. / data + Hw Flow Control signals balls IIC 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 4 Hardware Commands 4.1 Turning ON the GE864-AUTO module To turn on the GE864-AUTO the pad ON* must be tied low for at least 1 seconds 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 For example: 1- Let's assume you need to drive the ON* pad with a totem pole output from +1.8V up to 5V microcontroller (uP_OUT1): 10k ON* +1.8V ... 5V 1s 2- Let's assume you need to drive the ON* pad directly with an ON/OFF button: ON* Reproduction forbidden without Telit Communications S.p.A.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 4.2 Turning OFF the GE864-AUTO The turning off of the device can be done in three ways: • by software command (see GE864-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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 3.8V Max Supply Voltage 4.2V Operating Supply Voltage Range 3.4V – 4.2V Wide Supply Voltage tolerant 3.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 5.2 General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps: • the electrical design • the thermal design • the PCB layout. 5.2.1 Electrical Design Guidelines The electrical design of the power supply depends strongly from the power source where this power is drained.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO module. The three cells Ni/Cd or Ni/MH 3,6 V Nom.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 5.2.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO 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 Voltage on Buffered -0.3V pins +3.6V +3.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 7.1 Reset signal Signal RESET Function Phone reset I/O I Bga Ball A2 RESET is used to reset the GE864-AUTO modules. Whenever this signal is pulled low, the GE864-AUTO is reset. When the device is reset it stops any operation. After the release of the reset GE864-AUTO is unconditionally shut down, without doing any detach operation from the network where it is registered.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 8 Serial Ports The serial port on the Telit GE864-AUTO 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 • microcontroller UART @ 2.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 The signals of the GE864-AUTO serial port are: RS232 Pin Number 1 Signal Name Usage DCD - dcd_uart GE864AUTO Pad Number D9 Data Carrier Detect 2 3 4 RXD - tx_uart TXD - rx_uart DTR - dtr_uart H8 E7 B7 Transmit line *see Note Receive line *see Note Data Terminal Ready 5 GND Ground 6 DSR - dsr_uart A1,F1,H1 L1, H2, L2, J3, K3….
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 8.2 RS232 level translation In order to interface the Telit GE864-AUTO with a PC com port or a RS232 (EIA/TIA-232) application a level translator is required.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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 set of signals. As for the RS232 translation there are a multitude of single chip translators.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 NOTE: The UART input line TXD (rx_uart) of the GE864-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 9 Audio Section Overview 16 -12dBFS 16 8 audio2.skd The Base Band Chip of the GE864-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 9.1 INPUT LINES (Microphone) 9.1.1 Short description The Telit GE864-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 9.1.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 9.2 OUTPUT LINES (Speaker) 9.2.1 Short description The Telit GE864-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 9.2.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 ch1: ON_OFF (2sec) ch2: GPIO 06 [ bis ] GE864-AUTO Fig.01 Reproduction forbidden without Telit Communications S.p.A.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 10.5 Using the RFTXMON Output GPIO5 The GPIO5 pin, when configured as RFTXMON Output, is controlled by the GE864-AUTO module and will rise when the transmitter is active and fall after the transmitter activity is completed. The TXMON pin behaviour can be configured using the AT command # TXMONMODE This command will be available only under AT#SELINT=2.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 10.6 Using the Alarm Output GPIO6 The GPIO6 pad, when configured as Alarm Output, is controlled by the GE864-AUTO module and will rise when the alarm starts and fall after the issue of a dedicated AT command.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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. 10.8 Indication of network service availability The STAT_LED pin status shows information on the network service availability and Call status. In the GE864-AUTO modules, the STAT_LED usually needs an external transistor to drive an external LED.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 10.9 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. 10.10 External 32KHz oscillator The GE864-AUTO has an internal 32.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 A possible Clock Oscillator is shown in figure: VDD VDD CLKOE MICRO CR YSTAL OV-7604-C7 Low Power Clock Oscillator 32.768KHz CLKOUT 32K_IN ball F3 GE864 AUTO GND The Clock Oscillator should be placed close to GE864-AUTO. The AT command used to test the presence and the status of an external 32KHz oscillator is #OSC32KHZ Refer to SW User Guide or AT Commands Reference Guide for the full description of this function.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11 ADC section 11.1 ADC Converter 11.1.1 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 0÷2 11 1 Volt bits mV The GE864-AUTO module provides 3 Analog to Digital Converters. The input lines are: ADC_IN1 available on Ball J11 and Pin 19 of PL102 on EVK2 Board (CS1302).
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11.2 Mounting the GE864-AUTO on your Board 11.2.1 General The Telit GE864-AUTO modules have been designed in order to be compliant with a standard lead-free SMT process. 11.2.2 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11.2.3 Recommended foot print for the application (GE864) Top View Reproduction forbidden without Telit Communications S.p.A.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11.2.4 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11.2.6 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11.2.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11.3 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 11.3.1 GE864 orientation on the tray 11.3.2 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 12 Conformity Assessment Issues The GE864-AUTO 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-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 13 SAFETY RECOMMANDATIONS READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required.
GE864-AUTO Hardware User Guide 1vv0300779 Rev.0 - 20/06/08 14 Document Change Log Revision Date Changes ISSUE#0 20/06/08 Release First ISSUE# 0 Reproduction forbidden without Telit Communications S.p.A.
