Telit Wireless Solutions GC864 Hardware User's Manual
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Telit Wireless Solutions GC864 Hardware User's Manual

Telit Wireless Solutions GC864 Hardware User's Manual

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GC864 Hardware User Guide
1vv0300733 Rev.12 – 2010-06-04

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Summary of Contents for Telit Wireless Solutions GC864

  • Page 1 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2010-06-04...

  • Page 2: Applicability Table

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 APPLICABILITY TABLE PRODUCT GC864-QUAD GC864-PY Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 2 of 69...
  • Page 3 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 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.

  • Page 4: Table Of Contents

    OCUMENT RGANIZATION 1.5............................8 ONVENTIONS 1.6...........................8 ELATED OCUMENTS 1.7.............................9 OCUMENT ISTORY OVERVIEW............................11 GC864 MECHANICAL DIMENSIONS ....................12 3.1. GC864-QUAD SIM H ..............13 ECHANICAL IEW OF ELIT WITH OLDER GC864-QUAD/PY MODULE CONNECTIONS ..................14 4.1. PIN-OUT ..............................14 4.1.1.
  • Page 5 ADC C ..........................62 ONVERTER 12.2.1. Description.............................62 12.2.2. Using ADC Converter........................62 MOUNTING THE GC864-QUAD/PY ON THE BOARD ..............63 13.1.1. Debug of the GC864-QUAD/PY in Production ................64 PACKING SYSTEM ........................65 CONFORMITY ASSESSMENT ISSUES ..................66   SAFETY RECOMMENDATIONS ....................68 Reproduction forbidden without Telit Communications S.p.A’s.

  • Page 6: Introduction

    1.1. Scope The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GC864-QUAD / PY module. 1.2. Audience This document is intended for Telit customers, who are integrators, about to implement their applications using our GC864 module.

  • Page 7: Document Organization

    Chapter 8: “Logic Level specifications” Specific values adopted in the implementation of logic levels for this module. Chapter 9: “Serial ports” The serial port on the Telit GC864 is the core of the interface between the module and OEM hardware Chapter 10: “Audio Section overview”...

  • Page 8: Text Conventions

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 1.5. Text Conventions Danger – This information MUST be followed or catastrophic equipment failure or bodily injury may occur. Caution or Warning Alerts the user to important points about integrating the –...

  • Page 9: Document History

    7 Updated 1.8V CMOS voltage range Updated operating voltage and P/N list ISSUE#9 2009-01-22 Updated GC864-PY with SIM Holder module in the list of modules concerned by this document Added useful parameters for ATEX Applications Updated Audio Block Diagram Applied new layout + minor editing...
  • Page 10 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 Noted in the pin-out section about rts in need of being connected to ground p.18 Updated all schematic drawings Updated Chapter 10 Audio Section Modified power consumption values ISSUE#11 2009-12-16 Fixed minor adobe acrobat issues Updated Chapter 7.1 Gain values...

  • Page 11: Overview

    Telit GC864-QUAD / PY module. For further hardware details that may not be explained in this document refer to the Telit GC864- QUAD / PY Product Description document where all the hardware information is reported.

  • Page 12: Gc864 Mechanical Dimensions

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 GC864 Mechanical Dimensions The Telit GC864-QUAD/PY module overall dimensions are: • Length: 36.2 mm • Width: 30 mm • Thickness: 3.2 mm Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved.

  • Page 13: Mechanical View Of Telit Gc864-Quad With Sim Holder

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 3.1. Mechanical View of Telit GC864-QUAD with SIM Holder Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 13 of 69...

  • Page 14: Gc864-Quad/Py Module Connections

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 GC864-QUAD/PY Module Connections 4.1. PIN-OUT The GC864-QUAD/PY uses a 80 pin Molex p.n. 53949-0878 male connector for the connections with the external applications. This connector matches the 54150-0878 models. Internal Signal I/O Function...
  • Page 15 CHARGE Charger input Power Input command for switching power ON or OFF (toggle command). The Ω ON/OFF* pulse to be sent to the GC864-QUAD/PY must be equal or greater than Pull up to VBATT 1 second. RESET* Reset input VRTC...
  • Page 16 4.7K CMOS 2.8V NOTE: The GC864 family Wireless Modules (GC864-QUAD and GC864-PY) has two DVI ports on the system interface. Only one port can be selected and be active at the time. The choice of DVI port depends on the needs of the application, but Telit suggests that applications only use the DVI2 port as this minimizes the impact on the module functionality.

  • Page 17: Gc864-Quad/Py Antenna Connector

    The counterpart suitable is Murata MXTK92 Type or MXTK88 Type. Moreover, the GC864-QUAD/PY has the antenna pads on the back side of the PCB. This allows the manual soldering of the coaxial cable directly on the back side of the PCB.

  • Page 18: Hardware Commands

    Turning ON the GC864-QUAD / PY To turn the GC864-QUAD / PY on, the pad ON# must be tied low for at least 1 second and then released. A pulse duration less than 1 second should also start the power on procedure, but this is not guaranteed.
  • Page 19 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 For example: 1- Let us assume you need to drive the ON# pad with a totem pole output of a +3/5 V microcontroller (uP_OUT1): 2- Let us assume you need to drive the ON# pad directly with an ON/OFF button: A flow chart with proper turn on procedure is detailed below: Reproduction forbidden without Telit Communications S.p.A’s.

  • Page 20: Turning Off The Gc864-Quad / Py

    Either ways, the device issues a detach request to network informing that the device will not be reachable any more. To turn OFF the GC864 via pin ON#, this must be tied low for at least 1s and then released.

  • Page 21: Hardware Unconditional Reboot

    Do not use any pull up resistor on the RESET* line nor any totem pole digital output. Using pull up resistor may cause latch up problems on the GC864-QUAD / PY power regulator and improper functioning of the module. The line RESET* must be connected only in open collector configuration.
  • Page 22 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 In the following flow chart is detailed the proper restart procedure: For example: 1- Let us assume you need to drive the RESET# pad with a totem pole output of a +3/5 V microcontroller (uP_OUT2): Reproduction forbidden without Telit Communications S.p.A’s.

  • Page 23: Power Supply

    3.8 V Max Supply Voltage 4.2 V 4.5 V Supply voltage range 3.4 V - 4.2 V 3.22 V – 4.5 V The GC864-QUAD / PY power consumptions are: GC864-QUAD / PY Average Mode Mode description (mA) SWITCHED OFF Module supplied but Switched Off Switched Off <26 uA...

  • Page 24: General Design Rules

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 The GSM system is made in a way that the RF transmission is not continuous but it is packed into bursts at a base frequency of about 216 Hz. The relative current peaks can be as high as about 2A.
  • Page 25 1vv0300733 Rev.12 – 2009-06-04 • A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks close to the GC864-QUAD / PY, a 100μF tantalum capacitor is usually suited. • Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V.
  • Page 26 • A protection diode must be inserted close to the power input, in order to save the GC864-QUAD/PY from power polarity inversion. This can be the same diode used for spike protection. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved.
  • Page 27 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 An example of switching regulator with 12V input is in the schematic below (split in 2 parts): Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 27 of 69...
  • Page 28 GC864-QUAD/PY and damage it. CAUTION: DO NOT USE any Ni-Cd, Ni-MH, and Pb battery types directly connected with GC864- QUAD/PY. Their use can lead to overvoltage on the GC864-QUAD/PY and damage it. USE ONLY Li-Ion battery types.
  • Page 29 The final charge can be of two different types: constant voltage or pulsed. GC864- QUAD/PY uses constant voltage. The constant voltage charge proceeds with a fixed voltage regulator (very accurately set to the maximum battery voltage) and hence the current will decrease while the battery is becoming charged.

  • Page 30: 6.2.2. Thermal Design Guidelines

    NOTE: For all the threshold voltages, inside the GC864-QUAD/PY all thresholds are fixed in order to maximize Li-Ion battery performances and do not need to be changed. NOTE: In this application the battery charger input current must be limited to less than 400mA.

  • Page 31: Power Supply Pcb Layout Guidelines

    As far as the heat generated by the GC864-QUAD / PY, you can consider it to be during transmissions of 1W max during CSD/VOICE calls and 2W max during class10 GPRS upload.

  • Page 32: Parameters For Atex Applications

    If your application does not have audio interface but only uses the data feature of the Telit GC864- QUAD / PY, then this noise is not so disturbing and power supply layout design can be more forgiving.
  • Page 33 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 • In abnormal conditions, the maximum RF output power is up to 34 dBm for few seconds. For this particular application, we recommend the customer to involve TTSC (Telit Technical Support Center) in the design phase of the application.

  • Page 34: Antenna

    RF exposure compliance. OEM integrators must ensure that the end user has no manual instructions to remove or install the GC864- QUAD / PY module. Antennas used for this OEM module must not exceed 3dBi gain for mobile and fixed operating configurations.

  • Page 35: Gsm Antenna - Installation Guidelines

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 7.2. 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;...

  • Page 36: Logic Level Specifications

    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 GC864-QUAD / PY interface circuits: Absolute Maximum Ratings – Not Functional Parameter Input level on any -0.3V...

  • Page 37: Reset Signal

    NOTE: Do not use this signal to power off the GC864-QUAD / PY. Use the ON/OFF signal to perform this function or the AT#SHDN command. Reset Signal Operating Levels:...

  • Page 38: Serial Ports

    The only configuration that does not need a level translation is the 2.8V UART. The serial port on the GC864-QUAD/PY is a +2.8V UART with all the 7 RS232 signals. It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels. The levels for the GC864-QUAD/PY UART are the CMOS levels: Absolute Maximum Ratings –Not Functional...
  • Page 39 According to V.24, RX/TX signal names are referred to the application side, therefore on the GC864-QUAD/PY side these signal are on the opposite direction: TXD on the application side will be connected to the receive line (here named TXD/ rx_uart ) of the GC864-QUAD/PY serial port and viceversa for RX.
  • Page 40 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 TIP: For a minimum implementation, only the TXD and RXD lines can be connected, the other lines can be left open provided a software flow control is implemented. TIP: In order to avoid noise or interferences on the RXD lines it is suggested to add a pull up resistor (100KΩ...

  • Page 41: Rs232 Level Translation

    1vv0300733 Rev.12 – 2009-06-04 9.2. RS232 Level Translation In order to interface the Telit GC864-QUAD/PY with a PC com port or a RS232 (EIA/TIA-232) application a level translator is required. This level translator must • invert the electrical signal in both directions •...
  • Page 42 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 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’s. written authorization - All Rights Reserved.

  • Page 43: Uart Level Translation

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 9.3. 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.
  • Page 44 QUAD / PY input lines connected to open collector outputs in order to avoid latch-up problems on the GC864-QUAD / PY. Care must be taken to avoid latch-up on the GC864-QUAD / PY and the use of this output line to power electronic devices shall be avoided, especially for devices that...

  • Page 45: Audio Section Overview

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 Audio Section Overview The Baseband chip was developed for the cellular phones, which needed two separated amplifiers both in RX and in TX section. A couple of amplifiers had to be used with internal audio transducers while the other couple of amplifiers had to be used with external audio transducers.
  • Page 46 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 EGold Lite Audio Section Block Diagram Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 46 of 69...

  • Page 47: Electrical Characteristics

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 10.2. Electrical Characteristics TIP: Being the microphone circuitry the more noise sensitive, its design and layout must be done with particular care. Both microphone paths are balanced and the OEM circuitry must be balanced designed to reduce the common mode noise typically generated on the ground plane.

  • Page 48: Output Lines Characteristics

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 10.2.2. Output Lines Characteristics TIP: We suggest driving the load differentially from both output drivers, thus the output swing will double and the need for the output coupling capacitor avoided. However if particular OEM application needs also a Single Ended circuitry can be implemented, but the output power will be reduced four times .
  • Page 49 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 “EAR_MT” Output Lines line coupling AC single-ended DC differential ≥ 14 Ω output load resistance 4 Ω ( internal output resistance typical signal bandwidth 150 - 4000 Hz @ -3 dB typical, open circuit max.

  • Page 50: General Purpose I/O

    GC864-QUAD / PY firmware and acts depending on the function implemented.
  • Page 51 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 Not all GPIO pads support all these three modes: • GPIO2 supports all three modes and can be input, output, Jamming Detect Output (Alternate function) • GPIO4 supports all three modes and can be input, output, RF Transmission Control (Alternate function) •...

  • Page 52: Gpio Logic Levels

    11.1. GPIO Logic Levels Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels. The following tables show the logic level specifications used in the GC864-QUAD/PY interface circuits: Absolute Maximum Ratings –Not Functional Parameter Input level on any -0.3V...

  • Page 53: Using Agpio Pad As Output

    In the design is necessary to add a pull up resistor (47K to VAUX). 11.5. Using the RFTXMON Output GPIO5 The GPIO5 pin, when configured as RFTXMON Output, is controlled by the GC864- QUAD / PY module and will rise when the transmitter is active and fall after the transmitter activity is completed.

  • Page 54: Using The Alarm Output Gpio6

    1vv0300733 Rev.12 – 2009-06-04 11.6. Using the Alarm Output GPIO6 The GPIO6 pad, when configured as Alarm Output, is controlled by the GC864-QUAD / PY module and will rise when the alarm starts and fall after the issue of a dedicated AT command.

  • Page 55: Magnetic Buzzer Concepts

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 +V buzzer SMBT2907A 4,7K D1N4148 33pF GPIO7 BCR141W Example of Buzzer ’ s driving circuit 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.

  • Page 56: 11.8.1 Frequency Behavior

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 The disk and diaphragm are attracted to the core by the magnetic field. When an oscillating signal is moved through the coil, it produces a fluctuating magnetic field, which vibrates the diaphragm at a frequency of the drive signal. Thus the sound is produced relative to the frequency applied.

  • Page 57: Working Current Influence

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 11.8.4. Working Current Influence In the component data sheet you will find the value of MAX CURRENT that represents the maximum average current that can flow at nominal voltage without current limitation.

  • Page 58: Indication Of Network Service Availability

    The STAT_LED pin status shows information on the network service availability and Call status. In the GC864-QUAD/PY 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.

  • Page 59: Rtc Bypass Out

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 11.11. 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.

  • Page 60: Vaux1 Power Output

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 11.12. VAUX1 Power Output A regulated power supply output is provided in order to supply small devices from the module. This output is active when the module is ON and goes OFF when the module is shut down.

  • Page 61: Dac And Adc Section

    Description The GC864-QUAD / PY module provides a Digital to Analog Converter. The signal (named DAC_OUT) is available on pin 40 of the GC864-QUAD / PY module and on pin 17 of PL102 on EVK2 Board (CS1203). 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.

  • Page 62: Low Pass Filter Example

    Resolution < 1 The GC864-QUAD / PY module provides 3 Analog to Digital Converters. The input lines are: ADC_IN1 available on Pin 37 and Pin 19 of PL102 on EVK2 Board (CS1203). ADC_IN2 available on Pin 38 and Pin 20 of PL102 on EVK2 Board (CS1203).

  • Page 63: Mounting The Gc864-Quad/Py On The Board

    The position of the Molex board to board connector and the pin 1 are shown in the following picture. NOTE: The metal tabs present on GC864-QUAD/PY must be connected to GND. This module could not be processed with a reflow. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved.

  • Page 64: Debug Of The Gc864-Quad/Py In Production

    To test and debug the mounting of the GC864, we strongly recommend to foreseen test pads on the host PCB, in order to check the connection between the GC864- QUAD/PY itself and the application and to test the performance of the module connecting it with an external computer.

  • Page 65: Packing System

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 Packing System The Telit GC864-QUAD and GC864-PY are packaged on trays of 20 pieces each. Section A- The size of the tray is: 329 x 176mm. WARNING: These trays can withstand at the maximum temperature of 65° C.

  • Page 66: Conformity Assessment Issues

    R&TTE Directive. Furthermore the GC864 module is FCC Approved as module to be installed in other devices. This device is to be used only for fixed and mobile applications. If the final product after integration is intended for portable use, a new application and FCC is required.
  • Page 67 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

  • Page 68: Safety Recommendations

    GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 SAFETY RECOMMENDATIONS NOTE: Read this section carefully to ensure the safe operation. 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 zfollowing areas: •...
  • Page 69 GC864 Hardware User Guide 1vv0300733 Rev.12 – 2009-06-04 The European Community provides some Directives for the electronic equipments introduced on the market. All the relevant information 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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