Telit Communications S p A UC864AWA GSM 850, E-GSM 900, DCS 1800, PCS 1900, FDD IV, 2G/3.5G module User Manual Users guide
Telit Communications S.p.A. GSM 850, E-GSM 900, DCS 1800, PCS 1900, FDD IV, 2G/3.5G module Users guide
Contents
- 1. User guide
- 2. Users guide
Users guide
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| Document ID | 1379663 |
| Application ID | UuWgHUNofGISHikamnkxFQ== |
| Document Description | Users guide |
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| Document Type | User Manual |
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| Date Submitted | 2010-11-22 00:00:00 |
| Date Available | 2011-05-21 00:00:00 |
| Creation Date | 2010-11-19 09:19:39 |
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| Document Lastmod | 2010-11-19 09:19:39 |
| Document Title | 1vv0300795_UC864-E-AWS-AUTO_Hardware_User_Guide_r11 |
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| Document Author: | fabriziodr |
UC864-E-AUTO UC864-AWS-AUTO Hardware User Guide 1vv0300795 Rev. 11 – 2010/11/18 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 This document is relating to the following products: PRODUCT UC864-E-AUTO UC864-AWS-AUTO Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 2 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 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. Telit makes every effort to ensure the quality of the information it makes available. Notwithstanding the foregoing, Telit 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 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 reserves the right to make modifications, additions and deletions to this document due to typographical errors, inaccurate information, or improvements to programs and/or equipment at any time and without notice. Such changes will, nevertheless be incorporated into new editions of this application note. All rights reserved. © 2008, 2010 Telit Communications S.p.A. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 3 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 Contents 1. OVERVIEW ............................................................................................................................................................... 6 2. MECHANICAL DIMENSIONS ............................................................................................................................... 7 2.1. 3. UC864-E-AUTO / AWS-AUTO MECHANICAL DIMENSIONS ................................................................................. 7 UC864-E-AUTO / AWS-AUTO MODULE CONNECTIONS............................................................................... 8 3.1. 4. PIN-OUT ............................................................................................................................................................. 8 TEMPERATURE RANGE ..................................................................................................................................... 12 4.1. 5. ANTENNA CONNECTOR(S) ................................................................................................................................... 13 HARDWARE COMMANDS .................................................................................................................................. 14 5.1. 5.2. 5.3. TURNING ON THE UC864-E-AUTO / AWS-AUTO ............................................................................................. 14 INITIALIZATION AND ACTIVATION STATE ................................................................................................................ 15 TURNING OFF THE UC864-E-AUTO / AWS-AUTO ........................................................................................... 17 5.3.1. Shutdown by Software Command........................................................................................................ 18 5.3.2. Hardware Shutdown .............................................................................................................................. 19 5.3.3. Hardware Unconditional Restart ......................................................................................................... 20 5.4. SUMMARY OF TURNING ON AND OFF THE MODULE .............................................................................................. 21 6. POWER SUPPLY .................................................................................................................................................... 22 6.1. 6.2. POWER SUPPLY REQUIREMENTS .......................................................................................................................... 22 GENERAL DESIGN RULES .................................................................................................................................... 24 6.2.1. Electrical Design Guidelines ................................................................................................................ 24 6.2.2. Thermal Design Guidelines .................................................................................................................. 30 6.2.3. Power Supply PCB Layout Guidelines ................................................................................................. 32 7. ANTENNA(S) ........................................................................................................................................................... 34 7.1. 7.2. 8. GSM/WCDMA ANTENNA REQUIREMENTS .......................................................................................................... 34 GSM/WCDMA ANTENNA - INSTALLATION GUIDELINES ....................................................................................... 35 LOGIC LEVEL SPECIFICATIONS ..................................................................................................................... 36 8.1. 9. RESET SIGNAL .................................................................................................................................................... 37 USB PORT................................................................................................................................................................ 38 9.1. 10. 10.1. 10.2. 10.3. 11. USB TRANSCEIVER SPECIFICATIONS .................................................................................................................... 39 SERIAL PORTS .................................................................................................................................................. 40 MODEM SERIAL PORT.......................................................................................................................................... 40 RS232 LEVEL TRANSLATION ............................................................................................................................... 43 5V UART LEVEL TRANSITION .............................................................................................................................. 46 AUDIO SECTION OVERVIEW ....................................................................................................................... 48 11.1. 11.2. SELECTION MODE ................................................................................................................................................ 48 ELECTRICAL CHARACTERISTICS ........................................................................................................................... 50 11.2.1. Input Lines (MIC1 and MIC2) Characteristics..................................................................................... 50 11.3. OUTPUT LINES (SPEAKER) .............................................................................................................................. 51 Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 4 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 11.3.1. 12. Output Lines Characteristics................................................................................................................ 51 GENERAL PURPOSE I/O ................................................................................................................................. 52 12.1. 12.2. 12.3. 12.4. 12.5. 12.6. 12.7. 12.8. LOGIC LEVEL SPECIFICATIONS ............................................................................................................................. 54 USING A GPIO PAD AS INPUT .............................................................................................................................. 55 USING A GPIO PAD AS OUTPUT ........................................................................................................................... 55 USING THE RF TRANSMISSION CONTROL GPIO4.................................................................................................. 56 USING THE RFTXMON OUTPUT GPIO5 .............................................................................................................. 56 USING THE ALARM OUTPUT GPIO6 ..................................................................................................................... 56 USING THE BUZZER OUTPUT GPIO7 .................................................................................................................... 57 MAGNETIC BUZZER CONCEPTS ............................................................................................................................ 58 12.8.1. Short Description ................................................................................................................................... 58 12.8.2. Frequency Behavior ............................................................................................................................... 59 12.8.3. Power Supply Influence ........................................................................................................................ 59 12.8.4. Working Current Influence ................................................................................................................... 59 12.9. USING THE TEMPERATURE MONITOR FUNCTION ................................................................................................... 60 12.9.1. Short Description ................................................................................................................................... 60 12.9.2. Allowed GPIO .......................................................................................................................................... 60 12.10. INDICATION OF NETWORK SERVICE AVAILABILITY ............................................................................................. 62 12.11. RTC BYPASS OUT ........................................................................................................................................... 63 12.12. VAUX1 POWER OUTPUT ................................................................................................................................. 63 13. DAC AND ADC SECTION ................................................................................................................................ 64 13.1. DAC CONVERTER ................................................................................................................................................ 64 Description.............................................................................................................................................. 64 Enabling DAC .......................................................................................................................................... 64 Low Pass Filter Example ...................................................................................................................... 65 13.2. ADC CONVERTER ................................................................................................................................................ 65 13.2.1. Description.............................................................................................................................................. 65 13.2.2. Using ADC Converter............................................................................................................................. 65 13.1.1. 13.1.2. 13.1.3. 14. 14.1. 14.2. 14.3. 14.4. 15. 15.1. 15.2. 15.3. 15.4. MOUNTING THE MODULE ON YOUR BOARD ......................................................................................... 66 APPLICATION PCB LAYOUT ................................................................................................................................. 67 CLEARANCE AREA ............................................................................................................................................... 69 THERMAL DISSIPATION ........................................................................................................................................ 69 MODULE SOLDERING ........................................................................................................................................... 70 APPLICATION GUIDE ..................................................................................................................................... 71 DEBUG OF THE UC864-E-AUTO / AWS-AUTO IN PRODUCTION ......................................................................... 71 BYPASS CAPACITOR ON POWER SUPPLIES ............................................................................................................ 72 SIM INTERFACE .................................................................................................................................................. 72 EMC RECOMMENDATIONS ................................................................................................................................... 73 16. PACKING SYSTEM ........................................................................................................................................... 74 17. CONFORMITY ASSESSMENT ISSUES ......................................................................................................... 75 18. SAFETY RECOMMENDATIONS .................................................................................................................... 77 19. DOCUMENT CHANGE LOG ........................................................................................................................... 78 Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 5 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 1. Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit UC864-E-AUTO and UC864-AWS-AUTO modules. 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 must be considered as mandatory, while the suggested hardware configurations must not be considered mandatory, instead the information given must be used as a guide and a starting point for properly developing your product with the Telit UC864-E-AUTO & UC864-AWS-AUTO modules. For further hardware details that may not be explained in this document refer to the Telit UC864-E–AUTO & UC864-AWS-AUTO Product Description document where all the hardware information is reported. NOTICE: (EN) The integration of the GSM/GPRS/EGPRS/WCDMA/HSDPA UC864-E-AUTO & UC864AWS-AUTO cellular module within user application must be done according to the design rules described in this manual. (IT) L’integrazione del modulo cellulare GSM/GPRS/EGPRS/WCDMA/HSDPA UC864- EAUTO e UC864-AWS-AUTO all’interno dell’applicazione dell’utente dovrà rispettare le indicazioni progettuali descritte in questo manuale. (DE) Die Integration des UC864- E-AUTO & UC864-AWS-AUTO GSM/GPRS/EGPRS/WCDMA/HSDPA Mobilfunk-Moduls in ein Gerät muß gemäß der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen (SL) Integracija GSM/GPRS/EGPRS/WCDMA/HSDPA UC864- E-AUTO & UC864-AWSAUTO modula v uporabniški aplikaciji bo morala upoštevati projektna navodila, opisana v tem piročniku. (SP) La utilización del modulo GSM/GPRS/EGPRS/WCDMA/HSDPA UC864- E-AUTO & UC864-AWS-AUTO debe ser conforme a los usos para los cuales ha sido deseñado descritos en este manual del usuario. (FR) L’intégration du module cellulaire GSM/GPRS/EGPRS/WCDMA/HSDPA UC864- EAUTO & UC864-AWS-AUTO dans l’application de l’utilisateur sera faite selon les règles de conception décrites dans ce manuel. (HE) UC864- E-AUTO / AWS The information presented in this document is believed to be accurate and reliable. However, no responsibility is assumed by Telit Communications 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 Communications S.p.A. other than for circuitry embodied in Telit products. This document is subject to change without notice. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 6 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 2. Mechanical Dimensions 2.1. UC864-E-AUTO / AWS-AUTO Mechanical Dimensions The Telit UC864-E-AUTO / AWS-AUTO module overall dimensions are: • Length: 36.2 mm • Width: 30.0 mm • Thickness: 5.1mm Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 7 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 3. UC864UC864-E-AUTO / AWSAWS-AUTO Module C onnections 3.1. PIN-OUT UC864-E-AUTO / AWS-AUTO uses an 80 pin Molex p.n. 53949-0878 male connector for the connections with the external applications. This connector matches the 54150-0878 models. Pin Signal I/O Function Internal Pull up Type Power Supply VBATT - Main power supply Power VBATT - Main power supply Power VBATT - Main power supply Power VBATT - Main power supply Power GND - Ground Power GND - Ground Power GND - Ground Power AXE I Hands-free switching EAR_HF+ AO Hands-free ear output, phase + Audio 10 EAR_HF- AO Hands-free ear output, phase - Audio 11 EAR_MT+ AO Handset earphone signal output, phase + Audio 12 EAR_MT- AO Handset earphone signal output, phase - Audio 13 MIC_HF+ AI Hands-free microphone input; phase + Audio 14 MIC_HF- AI Hands-free microphone input; phase - Audio 15 MIC_MT+ AI Handset microphone signal input; phase+ Audio 16 MIC_MT- AI Handset microphone signal input; phase- Audio Audio CMOS 2.6V SIM Card Interface 18 SIMVCC - External SIM signal – Power supply for the SIM 1.8 / 3V 19 SIMRST O External SIM signal – Reset 1.8 / 3V 20 SIMIO 21 SIMIN I External SIM signal - Presence (active low) 22 SIMCLK O External SIM signal – Clock I/O External SIM signal - Data I/O 1.8 / 3V CMOS 2.6V 1.8 / 3V Trace 23 RX_TRACE I RX Data for debug monitor CMOS 2.6V 24 TX_TRACE O TX Data for debug monitor CMOS 2.6V On this line a maximum of 10nF bypass capacitor is allowed Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 8 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 Pin Signal I/O Function Internal Pull up Type Prog. / Data + Hw Flow Control 25 C103/TXD I Serial data input (TXD) from DTE Pull-Down CMOS 2.6V 26 C104/RXD O Serial data output to DTE Pull-Up CMOS 2.6V 27 C107/DSR O Output for Data set ready signal (DSR) to DTE Pull-Down CMOS 2.6V 28 C106/CTS O Output for Clear to send signal (CTS) to DTE Pull-Up CMOS 2.6V 29 C108/DTR I Input for Data terminal ready signal (DTR) from DTE Pull-Up CMOS 2.6V 30 C125/RING O Output for Ring indicator signal (RI) to DTE Pull-Up CMOS 2.6V 31 C105/RTS I Input for Request to send signal (RTS) from DTE Pull-Down CMOS 2.6V 32 C109/DCD O Output for Data carrier detect signal (DCD) to DTE Pull-Up CMOS 2.6V Miscellaneous Functions Analog input used to sense whether a peripheral device is connected, and determine the peripheral type, a host or a peripheral 35 USB_ID AI 36 PCM_CLOCK I/O PCM clock out Analog Pull-Down CMOS 2.6V DAC and ADC 37 ADC_IN1 AI Analog/Digital converter input A/D 38 ADC_IN2 AI Analog/Digital converter input A/D 39 ADC_IN3 AI Analog/Digital converter input A/D 40 DAC_OUT AO Digital/Analog converter output D/A Miscellaneous Functions 45 STAT_LED O Status indicator led CMOS 1.8V 46 GND - Ground 48 USB_VBUS AI Power supply for the internal USB transceiver. This pin is /A configured as an analog input or an analog output depending O upon the type of peripheral device connected. 49 PWRMON O Power ON Monitor 50 VAUX1 - Power output for external accessories 51 CHARGE AI Charger input 52 CHARGE AI Charger input Ground 47KΩ pull-down 4.4V ~5.25V 1KΩ CMOS 2.6V 10KΩ pull-down Power Power 53 ON/OFF Input command for switching power ON or OFF (toggle command). Pulled up on chip 54 RESET I Reset input 55 VRTC AO Power supply for RTC block 56 GPIO_19 I/O GPIO19 Configurable GPIO CMOS 2.6V 57 GPIO_11 I/O GPIO11 Configurable GPIO CMOS 2.6V 58 GPIO_20 I/O GPIO20 Configurable GPIO CMOS 2.6V 59 GPIO_04 I/O GPIO4 Configurable GPIO CMOS 2.6V 60 GPIO_14 I/O GPIO14 Configurable GPIO CMOS 2.6V 61 GPIO_15 I/O GPIO15 Configurable GPIO CMOS 2.6V 10KΩ Power Telit GPIOs Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 9 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 Pin Signal I/O Function Internal Pull up Type 62 GPIO_12 I/O GPIO12 Configurable GPIO CMOS 2.6V 63 GPIO_10/ PCM_TX I/O GPIO10 Configurable GPIO / PCM Data Output 64 GPIO_22 I/O GPIO22 Configurable GPIO 65 GPIO_18/ PCM_RX I/O GPIO18 Configurable GPIO / PCM Data input 66 GPIO_03 I/O GPIO3 Configurable GPIO CMOS 2.6V 67 GPIO_08 I/O GPIO8 Configurable GPIO CMOS 2.6V 68 GPIO_06 / ALARM I/O GPIO6 Configurable GPIO / ALARM CMOS 2.6V 70 GPIO_01 I/O GPIO1 Configurable GPIO CMOS 2.6V 71 GPIO_17/ PCM_SYNC I/O GPIO17 Configurable GPIO / PCM Sync 72 GPIO_21 I/O GPIO21 Configurable GPIO CMOS 2.6V 73 GPIO_07/ BUZZER I/O GPIO7 Configurable GPIO / Buzzer CMOS 2.6V 74 GPIO_02 I/O GPIO02 I/O pin CMOS 2.6V 75 GPIO_16 I/O GPIO16 Configurable GPIO CMOS 2.6V 76 GPIO_09 I/O GPIO9 Configurable GPIO CMOS 2.6V 77 GPIO_13 I/O GPIO13 Configurable CMOS 2.6V 78 GPIO_05/ RFTXMON I/O GPIO05 Configurable GPIO / Transmitter ON monitor CMOS 2.6V Pull-Down CMOS 2.6V CMOS 1.8V Pull-Down Pull-Down CMOS 2.6V CMOS 2.6V USB Interface 79 USB_D+ I/O USB differential Data (+) 80 USB_D- I/O USB differential Data (-) 3.0V ~3.6V 3.0V ~3.6V RESERVED 17 33 34 41 42 43 44 47 69 NOTE: RESERVED pins must not be connected RTS must be connected to the GND (on the module side) if flow control is not used Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 10 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 Note: Note: If not used, almost all pins must be left disconnected. The only exceptions are the following: Pin Signal Function VBATT Main power supply VBATT Main power supply VBATT Main power supply VBATT Main power supply GND Ground GND Ground GND Ground 46 GND Ground 25 C103/TXD Serial data input (TXD) from DTE 26 C104/RXD Serial data output to DTE 31 C105/RTS 53 ON/OFF 54 RESET Input for Request to send signal (RTS) from DTE Input command for switching power ON or OFF (toggle command). Reset input Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 11 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 4. TEMPERATURE RANGE The UC864-E-AUTO / AWS-AUTO Temperature ranges are: Reference Ambient Temperature Normal Operating -10°C to +55°C Extended Operating -20°C to +70°C Extreme Range -30°C to +85°C Storage -40°C to +85°C Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 12 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 4.1. Antenna Connector(s) The UC864-E-AUTO / AWS-AUTO module is designed with a 50 Ohm RF PAD that permits to interface it with an application equipped by a Rosenberger coaxial Board to board connector. The counterpart suitable is a Rosenberger 99CI106-030L5. Suggested footprint on the application side: Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 13 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 5. Hardware Commands 5.1. Turning ON the UC864-E-AUTO / AWS-AUTO To turn on UC864-E-AUTO / AWS-AUTO, 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. ON# to simple circuit do it is: R1 Q1 Power ON impulse R2 GND Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 14 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 5.2. Initialization and Activation state Upon turning on UC864-E-AUTO / AWS-AUTO, the module is not activated yet because the boot sequence of UC864-E-AUTO / AWS-AUTO is still going on internally. It takes about 10 seconds to complete the initializing the module internally. For this reason, it would be useless to try to access UC864-E-AUTO/ AWS-AUTO during a Initialization state as below. To get the desirable stability, UC864-E-AUTO / AWS-AUTO needs at least 10 seconds after the PWRMON goes High. During the Initialization state, any kind of AT-command is not available. DTE must be waiting for the Activation state to communicate with UC864-E-AUTO / AWS-AUTO. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 15 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 NOTE: To check if the UC864-E-AUTO / AWS-AUTO has powered on, the hardware line PWRMON must be monitored. When PWRMON goes high, the module has powered on. NOTE: Do not use any pull up resistor on the ON/OFF# line, it is internally pulled up. Using pull up resistor may bring to latch up problems on the UC864-E-AUTO / AWS-AUTO power regulator and improper power on/off of the module. The line ON/OFF# must be connected only in open collector configuration. NOTE: In this document all the lines are inverted. Active low signals are labeled with a name that ends with a "#" or with a bar over the name. NOTE: UC864-E-AUTO / AWS-AUTO turns fully on also by supplying power to the Charge pad (provided there is a battery on the VBATT pads). For example: 10k 1- Let us assume you need to drive the ON/OFF# pad with a totem pole output of a +1.8/5 V microcontroller (uP_OUT1): 1.8 / 5V 1s Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 16 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 5.3. Turning OFF the UC864-E-AUTO / AWS-AUTO Turning off the device can be done in three ways: • by software command (see UC864-E-AUTO / AWS-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. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 17 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 5.3.1. Shutdown by Software Command UC864-E-AUTO / AWS-AUTO can be shut down by a software command. When a shut down command is sent, UC864-E-AUTO / AWS-AUTO goes into the finalization state and finally will shut down PWRMON at the end of this state. The period of the finalization state can differ according to the situation in which the UC864-E-AUTO / AWS-AUTO is so it cannot be fixed definitely. Normally it will be above 10 seconds later from sending a shut down command and DTE should monitor the status of PWRMON to see the actual power off. TIP: To check if the device has powered off, hardware line PWRMON must be monitored. When PWRMON goes low, the device has powered off. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 18 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 5.3.2. Hardware Shutdown To turn OFF UC864-E-AUTO / AWS-AUTO the pad ON/OFF# must be tied low for at least 2 seconds and then released. Same circuitry and timing for the power on must be used. When the hold time of ON/OFF# is above 2 seconds, UC864-E-AUTO / AWS-AUTO goes into the finalization state and finally will shut down PWRMON at the end of this state. The period of the finalization state can differ according to the situation in which the UC864-E-AUTO / AWS-AUTO is so it cannot be fixed definitely. Normally it will be above 10 seconds later from releasing ON/OFF# and DTE should monitor the status of PWRMON to see the actual power off. TIP: To check if the device has powered off, hardware line PWRMON must be monitored. When PWRMON goes low, the device has powered off. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 19 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 5.3.3. Hardware Unconditional Restart To unconditionally restart UC864-E-AUTO / AWS-AUTO, the pad RESET# must be tied low for at least 200 milliseconds and then released. A simple circuit to do it is: RESET# Unconditional Restart impulse GND NOTE: Do not use any pull up resistor on the RESET# line or any totem pole digital output. Using pull up resistor may bring to latch up problems on the UC864-E-AUTO / AWSAUTO power regulator and improper functioning of the module. The line RESET# must be connected only in open collector configuration. TIP: The unconditional hardware Restart must always be implemented on the boards and the software must use it as an emergency exit procedure. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 20 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 For example: 10k 1- Let us assume you need to drive the RESET# pad with a totem pole output of a +1.8/5 V microcontroller (uP_OUT2): +1.8 / 5V 5.4. Summary of Turning ON and OFF the module Below chart describes the overall sequences for Turning ON and OFF. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 21 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 6. 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. Read carefully the requirements and the guidelines that will follow for a proper design. 6.1. Power Supply Requirements The UC864-E-AUTO / AWS-AUTO power requirements are: Power Supply Nominal Supply Voltage Max Supply Voltage Supply Voltage Range Mode IDLE mode AT+CFUN=1 AT+CFUN=4 3.8V 4.2V 3.4V – 4.2V UC864UC864 - E- AUTO/ AUTO/ AWSAWS- AUTO Mode Description Average(mA) D escription Stand by mode; no call in progress WCDMA 22.0 GSM 15.0 WCDMA 17.8 GSM 17.8 WCDMA 4.1 / 1.3* GSM 3.3 / 1.3* AT+CFUN=0 or AT+CFUN=5 Normal mode; full functionality of the module Disabled TX and RX; modules is not registered on the network Power saving; CFUN=0 module registered on the network and can receive voice call or an SMS; but it is not possible to send AT commands; module wakes up with an unsolicited code (call or SMS) or rising RTS line. CFN=5 full functionality with power saving; Module registered on the network can receive incoming call sand SMS WCDMA TX and RX mode WCDMA Voice 690 WCDMA voice channel WCDMA data 680 WCDMA data channel HSDPA 730 HSDPA data channel GSM TX and RX mode GSM Voice 320 GSM voice channel GPRS Class12 650 GPRS data channel EDGE Class12 430 EDGE data channel * Worst/best case depends on network configuration and is not under module control. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 22 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 In GSM/GPRS mode, RF transmission is not continuous and it is packed into bursts at a base frequency of about 216 Hz, and the relative current peaks can be as high as about 2A. Therefore the power supply has to be designed in order to withstand 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. If the layout of the PCB is not well designed, a strong noise floor is generated on the ground; this will reflect on all the audio paths producing an audible annoying noise at 216 Hz; if the voltage drops during the peak, current absorption is too much. The device may even shut TIP: The electrical design for the Power supply must be made ensuring that it will be capable of a peak current output of at least 2A. down as a consequence of the supply voltage drop. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 23 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 6.2. General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps: 6.2.1. • the electrical design • the thermal design • the PCB layout Electrical Design Guidelines The electrical design of the power supply depends strongly on the power source where this power is drained. We will distinguish them into three categories: 6.2.1.1. • +5V input (typically PC internal regulator output) • +12V input (typically automotive) • battery + 5V Input Source Power Supply Design Guidelines • The desired output for the power supply is 3.8V, hence there is not a big difference between the input source and the desired output and a linear regulator can be used. A switching power supply will not be suited because of the low drop-out requirements. • When using a linear regulator, a proper heat sink must be provided in order to dissipate the power generated. • A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks close to UC864-E-AUTO / AWSAUTO, 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. • A protection diode must be inserted close to the power input, in order to save UC864-E-AUTO / AWS-AUTO from power polarity inversion. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 24 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 An example of linear regulator with 5V input is: 6.2.1.2. + 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 must not be used. A switching power supply will be preferable because of its better efficiency especially with the 2A peak current load represented by UC864-E-AUTO / AWS-AUTO. • When using a switching regulator, a 500kHz or more switching frequency regulator is preferable because of its smaller inductor size and its faster transient response. This allows the regulator to respond quickly to the current peaks absorption. • In any case, the frequency and Switching design selection is related to the application to be developed due to the fact the switching frequency could also generate EMC interferences. • For car PB battery the input voltage can rise up to 15.8V and this must be kept in mind when choosing components: all components in the power supply must withstand this voltage. • A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks. A 100µF tantalum capacitor is usually suited for this. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 25 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 • Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V. • For Car applications a spike protection diode must be inserted close to the power input, in order to clean the supply from spikes. • A protection diode must be inserted close to the power input, in order to save UC864-E-AUTO / AWS-AUTO from power polarity inversion. This can be the same diode as for spike protection. 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’s. written authorization - All Rights Reserved. Page 26 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 6.2.1.3. Battery Source Power Supply Design Guidelines • The desired nominal output for the power supply is 3.8V and the maximum allowed voltage is 4.2V, hence a single 3.7V Li-Ion cell battery type is suited for supplying the power to the Telit UC864-E-AUTO / AWSAUTO module. The three cells Ni/Cd or Ni/MH 3.6 V Nom. battery types or 4V PB types must not be used directly since their maximum voltage can rise over the absolute maximum voltage for UC864-E-AUTO / AWS-AUTO and damage it. NOTE: Do not use any Ni-Cd, Ni-MH, and Pb battery types directly connected with UC864-EAUTO / AWS-AUTO. Their use can lead to overvoltage on UC864-E-AUTO / AWS-AUTO and damage it. Use only Li-Ion battery types. • A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks, a 100µF tantalum capacitor is usually suited. • Make sure the low ESR capacitor (usually a tantalum one) is rated at least 10V. • A protection diode must be inserted close to the power input, in order to save UC864-E-AUTO / AWS-AUTO from power polarity inversion. Otherwise the battery connector must be done in a way to avoid polarity inversions when connecting the battery. • The battery capacity must be at least 500mAh in order to withstand the current peaks of 2A; the suggested capacity is from 500mAh to 1000mAh. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 27 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 6.2.1.4. 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 of a battery voltage measure, indicating roughly its charge status. If the battery is deeply discharged, meaning its voltage is lower than the trickle charging threshold, then charging must start slowly, possibly with a current limited to the pre-charging process. The current must be kept very low with respect to the fast charge value. During trickle charging the voltage across the battery terminals rises; when it reaches the fast charge threshold level the charging process goes into a fast charge phase. During the fast charge phase the process proceeds with a current limited for charging; this current limit depends on the required time for completing the charge and on battery pack capacity. During this phase the voltage across the battery terminals still raises but at a lower rate. Once the battery voltage reaches its maximum voltage the process goes into its third state: Final charging. The voltage measure to change the process status into final charge is very important. It must be ensured that the maximum battery voltage is never exceeded, otherwise the battery may be damaged and even explode. Moreover, for constant final chargers, the voltage phase (final charge) must not start before the battery voltage has reached its maximum value, otherwise the battery capacity will be slightly reduced. The final charge can be of two different types: constant voltage or pulsed. UC864-E-AUTO / AWS-AUTO uses constant voltage. The constant voltage charge proceeds with a fixed voltage regulator (very accurately set to the maximum battery voltage) and the current will decrease while the battery is becoming charged. When the charging current falls below a certain fraction of the fast charge current value, the battery is considered fully charged, the final charge stops and eventually starts the maintenance. The pulsed charge process has no voltage regulation, instead charge continues with pulses. Usually the pulse charge works in the following manner: the charge is stopped for some time, let us say few hundreds of ms, then the battery voltage will be measured and when it drops below its maximum value, a fixed time length charging pulse is issued. As the battery approaches its full charge, the off time will become longer and the duty-cycle of the pulses will decrease. The battery is considered fully charged when the pulse duty-cycle is less than a threshold value, Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 28 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 typically 10%. When this happens, the pulse charge stops and eventually the maintenance starts. The last phase is not properly a charging phase, since the battery at this point is fully charged and the process may stop after the final charge. The maintenance charge provides an additional charging process to compensate the charge leak typical of a Li-Ion battery. It is done by issuing pulses with a fixed time length, again few hundreds of ms, and a duty-cycle around 5% or less. This last phase is not implemented in the UC864-E-AUTO / AWS-AUTO internal charging algorithm so once-charged battery is left discharging down to a certain threshold. It is cycled from full charge to slight discharge even if the battery charger is inserted. This guarantees that the remaining charge in the battery is a good percentage and that the battery is not damaged by keeping it always fully charged (Li-Ion rechargeable batteries usually deteriorate when kept fully charged). 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. This is typical for the UC864-E-AUTO / AWS-AUTO internal charger. As you can see, the charging process is not a trivial task to do; moreover all these operations must start only if battery temperature is inside charging range, usually 5°C - 45°C. The UC864-E-AUTO / AWS-AUTO measures the temperature of its internal component in order to satisfy this last requirement. This not exactly the same as the battery temperature but in common use, the two temperatures must not differ too much and the charging temperature range must be guaranteed. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 29 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 NOTE: For all the threshold voltages, inside UC864-E-AUTO / AWS-AUTO, 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. This can be done by using a current limited wall adapter as the power source. NOTE: When starting the charger from Module powered off, the startup will be in CFUN4; to activate the normal mode a command AT+CFUN=1 has to be provided. There is also the possibility to activate the normal mode using the ON_OFF* signal. In this case, when HW powering off the module with the same line (ON_OFF*) and having the charger still connected, the module will go back to CFUN4. NOTE: It is important to have a 100ųF Capacitor to VBAT in order to avoid instability of the charger circuit if the battery is accidentally disconnected during the charging activity. 6.2.2. Thermal Design Guidelines The thermal design for the power supply heat sink must be done with the following specifications: • Average current consumption during HSDPA transmission @PWR level max in UC864-E-AUTO / AWS-AUTO : 730mA • Average current consumption during class12 GPRS transmission @PWR level max: 650mA Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 30 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 NOTE: The average consumption during transmissions depends on the power level at which the device is requested to transmit via the network. The average current consumption hence varies significantly. NOTE: The thermal design for the Power supply must be made keeping an average consumption at the max transmitting level during calls of 730mA rms. Considering the very low current during idle, especially if Power Saving function is enabled, it is possible to consider from the thermal point of view that the device absorbs current significantly only during calls. If we assume that the device stays in transmission for short periods of time (let us say few minutes) and then remains for quite a long time in idle (let us say one hour), then the power supply has always the time to cool down between the calls and the heat sink could be smaller than the calculated for 730mA maximum RMS current. There could even be a simple chip package (no heat sink). Moreover in average network conditions the device is requested to transmit at a lower power level than the maximum and hence the current consumption will be less than 730mA (being usually around 250mA). For these reasons the thermal design is rarely a concern and the simple ground plane where the power supply chip is placed can be enough to ensure a good thermal condition and avoid overheating. For the heat generated by the UC864-E-AUTO / AWS-AUTO, you can consider it to be during transmission 2W max. This generated heat will be mostly conducted to the ground plane under the UC864-E-AUTO / AWS-AUTO; you must ensure that your application can dissipate heat In the WCDMA/HSDPA mode, since UC864-E-AUTO / AWS-AUTO emits RF signals continuously during transmission, you must pay special attention how to dissipate the heat generated. The current consumption will be up to about 730mA in HSDPA (680mA in WCDMA) continuously at the maximum TX output power (24dBm). Thus, you must arrange the PCB area as large as possible under UC864-E-AUTO / AWS-AUTO which you will mount. You must mount UC864-E-AUTO / AWS-AUTO on the large ground area of your application board and make many ground vias to dissipate the heat. The peak current consumption in the GSM mode is higher than that in WCDMA. However, considering the heat sink is more important in case of WCDMA. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 31 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 As mentioned before, a GSM signal is bursty, thus, the temperature drift is more insensible than WCDMA. Consequently, if you prescribe the heat dissipation in the WCDMA mode, you don’t need to think more about the GSM mode. 6.2.3. Power Supply PCB Layout Guidelines As seen in the electrical design guidelines, the power supply must 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. • The Bypass low ESR capacitor must be placed close to the Telit UC864-EAUTO / AWS-AUTO power input pads, or in the case the power supply is a switching type, it can be placed close to the inductor to cut the ripple if the PCB trace from the capacitor to UC864-E-AUTO / AWS-AUTO is wide enough to ensure a drop-less connection even during the 2A current peaks. • The protection diode must be placed close to the input connector where the power source is drained. • The PCB traces from the input connector to the power regulator. IC must be wide enough to ensure no voltage drops to occur when the 2A current peaks are absorbed. Note that this is not made in order to save power loss but especially to avoid the voltage drops on the power line at the current peaks frequency of 216 Hz that will reflect on all the components connected to that supply (also introducing the noise floor at the burst base frequency.) For this reason while a voltage drop of 300-400 mV may be acceptable from the power loss point of view, the same voltage drop may not be acceptable from the noise point of view. If your application does not have audio interface but only uses the data feature of the Telit UC864-E-AUTO, then this noise is not so disturbing and power supply layout design can be more forgiving. • The PCB traces to UC864-E-AUTO / AWS-AUTO and the Bypass capacitor must be wide enough to ensure no significant voltage drops to occur when the 2A current peaks are absorbed. This is a must for the same abovementioned reasons. Try to keep this trace as short as possible. • The PCB traces connecting the Switching output to the inductor and the switching diode must be kept as short as possible by placing the inductor and the diode very close to the power switching IC (only for switching power supply). This is done in order to reduce the radiated field (noise) at the switching frequency (usually 100-500 kHz). • The use of a good common ground plane is suggested. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 32 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 • The placement of the power supply on the board must be done in a way to guarantee that the high current return paths in the ground plane are not overlapped to any noise sensitive circuitry as the microphone amplifier/buffer or earphone amplifier. • The power supply input cables must be kept separately from noise sensitive lines such as microphone/earphone cables. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 33 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 7. Antenna(s) Antenna(s) The antenna connection and board layout design are the most important parts in the full product design and they strongly reflect on the product’s overall performances. Read carefully and follow the requirements and the guidelines for a proper design. 7.1. GSM/WCDMA Antenna Requirements As suggested on the Product Description, the antenna for a Telit UC864-E-AUTO / AWS-AUTO device must fulfill the following requirements: GSM /WCDMA ANTENNA REQUIREMENTS Frequency range Bandwidth Gain Impedance Input power VSWR absolute max VSWR recommended Depending by frequency band(s) provided by the network operator, the customer shall use the most suitable antenna for that/those band(s) UC864UC864- E- AUTO 80 MHz in GSM900, 170 MHz in DCS 250 MHz in WCDMA2100 band UC864UC864- AWSAWS -AUTO 70 MHz in GSM850, 140 MHz in PCS 455 MHz in WCDMA1700(AWS) band WCDMA AWS band : TX = 45MHz, RX = 45MHz TX-RX freq. separation = 400MHz Gain < 7.18 dBi (GSM 850), 2.78 dBi (PCS 1900) and 1.43 dBi (FDD IV) 50 Ohm > 33dBm(2 W) peak power in GSM > 24dBm Average power in WCDMA <= 10:1 <= 2:1 Furthermore if the device is developed for the US market, it must comply to the FCC approval requirements: This device is to be used only for mobile and fixed application. The antenna(s) used for this transmitter 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. End-Users must be provided with transmitter operation conditions for satisfying RF exposure compliance. OEM integrators must ensure that the end user has no manual instructions to remove or install the UC864AWS-AUTO module. Antennas used for this OEM module must not exceed 7.18 dBi (GSM 850), 2.78 dBi (PCS 1900) and 1.43 dBi (FDD IV) gain for mobile and fixed operating configurations. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 34 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 7.2. GSM/WCDMA Antenna - Installation Guidelines • Install the antenna in a place covered by the GSM/WCDMA 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 must not be installed inside metal cases; • Antenna must be installed also according Antenna manufacturer instructions. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 35 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 8. Logic Level Level Specifications Where not specifically stated, all the interface circuits work at 2.6V CMOS logic levels. The following table shows the logic level specifications used in the Telit UC864-E-AUTO / AWS-AUTO interface circuits: NOTE: Do not connect UC864-E-AUTO / AWS-AUTO’s digital logic signal directly to OEM’s digital logic signal of with level higher than 3.0V. For 2.6V CMOS signals: Absolute Maximum Ratings - Not Functional UC864UC864- E- AUTO / AWSAWS-AUTO Parameter Min Max Input level on any -0.3V +3.0V digital pin when on Input voltage on -0.3V +3.0 V analog pins when on Operating Operating Range - Interface levels UC864UC864- E- AUTO / AWSAWS -AUTO Level Min Max Input high level 2.0V 2.9 V Input low level Output high level Output low level -0.3V 2.15V 0V 0.6V 2.6V 0.45V For 1,8V signals: Operating Range - Interface levels (1.8V CMOS) UC864UC864- E- AUTO / AWSAWS -AUTO Level Lev el Min Max Input high level 1.5V 2.1V Input low level Output high level Output low level -0.3V 1.35V 0V 0.5V 1.8V 0.45V Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 36 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 8.1. Reset Signal Signal RESET Function Phone reset I/O PIN Number 54 RESET is used to reset the UC864-E-AUTO / AWS-AUTO module. Whenever this signal is pulled low, UC864-E-AUTO / AWS-AUTO is reset. When the device is reset it stops all operations. After the release of the reset UC864-E-AUTO / AWS-AUTO is unconditionally shut down, without doing any detach operations from the network where it is registered. This behavior is not a proper shutdown because the device is requested to issue a detach request on turn off. For this reason, the Reset signal must not be used for normally shutting down the device, but only as an emergency exit in the rare case the device remains stuck waiting for some network response. The RESET is internally controlled on start-up to achieve always a proper power-on reset sequence. There is no need to control this pin on start-up. It may only be used to reset a device already on, that is, not responding to any command. NOTE: Do not use this signal to power off UC864-E-AUTO / AWS-AUTO. Use the ON/OFF signal to perform this function or the AT#SHDN command. Reset Signal Operating levels: Signal RESET Input high RESET Input low Min 2.0V* 0V Max 2.6V 0.2V * This signal is internally pulled up so the pin can be left floating if not used. If unused, this signal may be left unconnected. If used, it must always be connected with an open collector transistor to permit the internal circuitry the power on reset and under voltage lockout functions. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 37 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 9. USB Port UC864-E-AUTO / AWS-AUTO includes an integrated universal serial bus (USB) transceiver, compatible with USB 2.0 specifications and supporting the USB FullSpeed (12 Mb/s) mode. In HSDPA (High Speed downlink Packet Access) mode, the downlink data speed rates up to 7.2Mbps. Hence OEMs need to interface UC864-EAUTO / AWS-AUTO to applications in full-speed (12Mbits/s) mode. This is the main communication port suggested for the OEM application. Signal UC864UC864 - E- AUTO / AWSAWS- AUTO Pad No. USB_VBUS 48 USB_D- 80 USB D+ 79 USB_ID (for future use) 35 Usage Power supply for the internal USB transceiver. This pin is configured as an analog input or an analog output depending upon the type of peripheral device connected. Minus (-) line of the differential, bi-directional USB signal to/from the peripheral device Plus (+) line of the differential, bi-directional USB signal to/from the peripheral device Analog input used to sense whether a peripheral device is connected and if connected, to determine the peripheral type, host or slave NOTE: UC864-E-AUTO / AWS-AUTO does NOT support host device operation at the moment, that is, it works as a slave device. Consequently USB_ID must be opened (not connected). Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 38 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 9.1. USB transceiver specifications This is the on-chip USB transceiver specifications Parameter Comments Min Typ Max Unit 4.5 5.0 5.25 25 mA 2.0 2.5 0.3 3.6 2.0 1.575 24.8 kΩ kΩ USB_VBUS : Supply Voltage Supply Current Levels Low--/full /full--speed : Input Lev els for Low Receiver Threshold (single-end) Differential Input Sensitivity Differential Common-mode Range |D+ - D-|, VIN = 0.8V to 2.5V Includes VDI 0.8 0.2 0.8 Low--/full /full--speed : Output Levels for Low Low High Output Signal Crossover Voltage RL = 1.5 kΩ to 3.6 V RL = 15 kΩ to GND 2.8 1.3 Terminations : Internal pull-up resistor Internal pull-down resistor High-Z state output impedance Termination Voltage VTRM to D+, VTRM to DD+ to GND, D- to GND 0 V < VD < 3.6V; measured at D+ and D- pins to GND An internal supply voltage, VTRM 1.425 14.3 1.5 15 300 3.0 kΩ 3.3 3.6 33 20 20 111 44 ns ns Ω 300 300 125 ns ns 182 kΩ Driver characteristics – F ull speed Transition time : Rise time Fall time Rise/fall time matching Series output resistance CL = 50 to 125 pF CL = 50 to 125 pF D+, D- 90 28 Driver characteristics – Low speed Transition time : Rise time Fall time Rise/fall time matching CL = 50 to 600 pF CL = 50 to 600 pF 75 75 80 USB_ID (for future use only) ID pin pull-up resistance A device detection threshold B device detection threshold 108 tdelay < 1 us, Vhys = 50mV tdelay < 1 us, Vhys = 50mV 140 0.15*VTRM 0.8*VTRM Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 39 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 10. Serial Ports The serial port on the Telit UC864-E-AUTO / AWS-AUTO is another possible interface between the module and OEM hardware. 2 serial ports are available on the module: 10.1. • MODEM SERIAL PORT; • MODEM SERIAL PORT 2 (DEBUG). Modem Serial Port Several configurations can be designed for the serial port on the OEM hardware. The most common are: • RS232 PC com port; • microcontroller UART @ 2.6V – 2.9V (Universal Asynchronous Receive Transmit) ; • microcontroller UART @ 5V or other voltages different from 2.6V . Depending on the type of serial port on the OEM hardware, a level translator circuit may be needed to make the system work. The only configuration that does not need a level translation is the 2.6V UART. The serial port on UC864-E-AUTO / AWS-AUTO is a +2.6V UART with all the 7 RS232 signals. It differs from the PC-RS232 in signal polarity (RS232 is reversed) and levels. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 40 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 The levels for UC864-E-AUTO / AWS-AUTO UART are the CMOS levels: Absolute Maximum Ratings - Not Functional Parameter Min Max Input level on any -0.3V +3.0V digital pin when on Input voltage on -0.3V +3.0 V analog pins when on Operating Range - Interface Levels Level Min Max Input high level Input low level Output high level Output low level 2.0V -0.3V 2.15V 0V 2.9 V 0.6V 2.6V 0.45V The signals of the UC864-E-AUTO / AWS-AUTO serial port are: Pin Signal I/O Function 25 C103/TXD Serial data input (TXD) from DTE 26 C104/RXD Serial data output to DTE 27 C107/DSR Output for Data set ready signal (DSR) to DTE 28 C106/CTS 29 C108/DTR 30 C125/RING 31 C105/RTS 32 C109/DCD Internal Type Pulls Up/Dn Pull-Down CMOS 2.6V Pull-Up CMOS 2.6V Pull-Down CMOS 2.6V Output for Clear to send signal (CTS) to DTE Pull-Up Input for Data terminal ready signal (DTR) from Pull-Up DTE Output for Ring indicator signal (RI) to DTE Pull-Up Input for Request to send signal (RTS) from Pull-Down DTE Output for Data carrier detect signal (DCD) to Pull-Up DTE CMOS 2.6V CMOS 2.6V CMOS 2.6V CMOS 2.6V CMOS 2.6V Internal pull-up or pull-down resistance is not a fixed value and it may differ from case by ca se. The resistance can be calculated from the DC characteristics considering a level of 2.6V DC. In this case I_ILPU(input low leakage current with pull-up) is between -60 and -10uA. Then the resistance can be calculated as V/I=2.6/60u ~ 2.6/10u = 43.3K ~ 260K. In case of pull-down, it can be calculated in the same way. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 41 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 NOTE: According to V.24, RX/TX signal names are referred to the application side, therefore on the UC864-E-AUTO / AWS-AUTO 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 UC864-E-AUTO / AWS-AUTO serial port and vice versa for RX. TIP: For 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. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 42 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 10.2. RS232 Level Translation In order to interface the Telit UC864-E-AUTO / AWS-AUTO 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; • change the level from 0/2.6V to +15/-15V . Actually, the RS232 UART 16450, 16550, 16650 & 16750 chipsets accept signals with lower levels on the RS232 side (EIA/TIA-562), allowing a lower voltage-multiplying ratio on the level translator. Note that the negative signal voltage must be less than 0V and hence some sort of level translation is always required. The simplest way to translate the levels and invert the signal is by using a single chip level translator. There are a multitude of them, differing in the number of drivers and receivers and in the levels (be sure to get a true RS232 level translator not a RS485 or other standards). By convention the driver is the level translator from the 0-2.6V UART to the RS232 level. The receiver is the translator from the RS232 level to 0-2.6V UART. In order to translate the whole set of control lines of the UART you will need: • 5 drivers • 3 receivers NOTE: The digital input lines working at 2.6V CMOS have an absolute maximum input voltage of 3.0V; therefore the level translator IC shall not be powered by the +3.8V supply of the module. Instead, it must be powered from a +2.6V / +2.9V (dedicated) power supply. This is because in this way the level translator IC outputs on the module side (i.e. UC864-E-AUTO / AWS-AUTO inputs) will work at +3.8V interface levels, damaging the module inputs. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 43 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 An example of level translation circuitry of this kind is: The example is done with a SIPEX SP3282EB RS232 Transceiver that could accept supply voltages lower than 3V DC. NOTE: In this case Vin has to be set with a value compatible with the logic levels of the module. (Max 2.9V DC). In this configuration the SP3282EB will adhere to EIA/TIA-562 voltage levels instead of RS232 (-5 ~ +5V) Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 44 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 Second solution could be done using a MAXIM transceiver (MAX218) In this case the compliance with RS232 (+-5V) is possible. Another level adapting method could be done using a standard RS232 Transceiver (MAX3237EAI) adding some resistors to adapt the levels on the UC864 Input lines. NOTE: In this case has to be taken in account the length of the lines on the application to avoid problems in case of High-speed rates on RS232. The RS232 serial port lines are usually connected to a DB9 connector with the following layout: signal names and directions are named and defined from the DTE point of view. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 45 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 10.3. 5V UART Level Transition If the OEM application uses a microcontroller with a serial port (UART) that works at a voltage different from 2.6 – 2.9V, then a circuitry has to adapt the different levels of the two signal sets. As for the RS232 translation, there are a multitude of single chip translators. For example a possible translator circuit for a 5V TRANSMITTER/RECEIVER can be: TIP: This logic IC for the level translator and 2.6V pull-ups (not the 5V one) can be powered directly from PWRMON line of UC864-E-AUTO / AWS-AUTO. Note that the TC7SZ07AE has open drain output; therefore the resistor R2 is mandatory. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 46 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 A power source of the internal interface voltage corresponding to the 2.6V CMOS high level is available at the VAUX pin on the connector. A maximum of 9 resistors of 47 KΩ pull-up can be connected to the VAUX pin, provided no other devices are connected to it and the pulled-up lines are UC864-EAUTO / AWS-AUTO input lines connected to open collector outputs in order to avoid latch-up problems on UC864-E-AUTO / AWS-AUTO. Careful approach is needed to avoid latch-up on UC864-E-AUTO / AWS-AUTO and the use of this output line to power electronic devices must be avoided, especially for devices that generate spikes and noise such as switching level translators, micro controllers, failure in any of these condition can severely compromise the UC864-EAUTO / AWS-AUTO functionality. NOTE: The input lines working at 2.6VCMOS can be pulled-up with 47KΩ resistors that can be connected directly to the VAUX line. It is a must that they are connected as in this example. The preferable configuration is having external supply for the buffer. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 47 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 11. 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. To distinguish the schematic signals and the Software identifiers, two different definitions were introduced, with the following meaning: • internal audio transducers HS/MT (from H andS S et or M icroT Telephone ) • external audio transducers HF (from HandsFree ) Actually the acronyms have not the original importance. In other words this distinction is not necessary, being the performances between the two blocks like the same. Only if yhe customer needs higher output power to the speaker , he has a constraint. Otherwise the choice could be done in order to overcome the PCB design difficulties. For these reasons we have not changed the HS and HF acronyms, keeping them in the Software and on the schematics. The Base Band Chip of the UC864-E-AUTO / AWS-AUTO Telit Module maintains the same architecture. For more information refer to Telit document: „80000NT10025a UC864 Audio Settings Application Note“ Note . 11.1. Selection Selection mode Only one block can be active at a time, and the activation of the requested audio path is done via hardware by AXE line or via software by AT#CAP command. Moreover the Sidetone functionality could be implemented by the amplifier fitted between the transmit path and the receive path, enabled at request in both modes. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 48 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 Balanced Ear MT+ EAR1ONP (EAR_AMP1) Differential Driver 32 Handset Single ended 32 Ear MT- EAR1OP (EAR_AMP1) Bias MIC MT+ MIC1P 100nF MIC 1 Balanced MIC MTSingle ended 100nF MIC1N Baseband Audio Front End Ear_HF+ Balanced HPH_R (EAR_AMP3) Single ended Ear_HF- 32 Mono Differential Headphone 32 Load HPH_L (EAR_AMP2) Bias Mic_HF+ MIC2P 100nF MIC 2 Balanced Mic_HFMIC2N Single ended 100nF uc864afe.skd UC864-E-AUTO / AWS-AUTO Audio Front End (AFE ) Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 49 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 11.2. Electrical Characteristics TIP: Being the microphone circuitry the more noise sensitive, its design and layout must be realized 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. However the customer can use the unbalanced circuitry for particular application.. 11.2.1. Input Lines (MIC1 and MIC2) Characteristics Line coupling Line type Coupling capacitor Differential input impedance Differential input voltage AC (*) Balanced / Unbalanced >=100nF 20Kohm 908mVrms (≤ 1290mVrms) @ MicG=0dB “Mic_MT” and “Mic_HF” microphone paths (*) WARNING : AC means that the signals from the microphone have to be connected to input lines of the module through capacitors which value has to be • 100nf. not respecting this constraint, the input stages will be damaged. WARNING: when particular OEM application needs a Single Ended Input configuration, it is forbidden connecting the unused input directly to Ground, but only through a 100nF capacitor. Don’t forget that thus the useful input signal will be halved. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 50 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 11.3. OUTPUT LINES (Speaker) 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. If a particular OEM application needs a Single Ended Output configuration the output power will be reduced four times. The OEM circuitry shall be designed to reduce the common mode noise typically generated on the ground plane and to get the maximum power output from the device (low resistance tracks). (*) WARNING: Using single ended configuration, the unused output line must be left open. Not respecting this constraint, the output stage will be damaged. 11.3.1. Output Lines Characteristics Line coupling differential single-ended Output load impedance differential Differential output impedance Signal bandwidth Differential output voltage (typ.) Max Output Power Max load capacitance DC AC 32 ohm (≤ 26) ≤ 01 ohm @1.02kHz 150 - 4000 Hz @ -3 dB 1060 mVrms /32 ohm 70mW @ 32 ohm 500pF “Ear_MT” Output (EAR_AMP1 differential amplifier) DC AC 32 ohm (≤ 26) Output load impedance 16 ohm (≤ 12) S.E. output impedance ≤ 0,5 ohm @ 1.02kHz signal bandwidth 150 - 4000 Hz @ -3 dB Differential output voltage (typ.) 833 mVrms /32 ohm Max Output Power @ 32 ohm 44mW differential @ 16 ohm 22mW single-ended Max load capacitance 1000pF Line coupling differential single-ended differential single-ended “Ear_HF” Output (EAR_AMP2 + EAR_AMP3 amplifiers) Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 51 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 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) Input pads can only be read and report the digital value (high or low) present on the pad at the read time; output pads can only be written or queried and set the value of the pad output; an alternate function pad is internally controlled by the UC864-EAUTO / AWS-AUTO firmware and acts depending on the function implemented. The following GPIOs are available on the UC864-E-AUTO / AWS-AUTO: CMOS 2.6V Drive strength 2mA Default State INPUT ON_OFF State LOW Reset State HIGH GPIO02 Configurable GPIO CMOS 2.6V 2mA INPUT LOW HIGH GPIO03 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW PIN Signal I/O Function Type 70 GPIO_01 I/O GPIO01 Configurable GPIO 74 GPIO_02 I/O 66 GPIO_03 I/O 59 GPIO_04 I/O GPIO04 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 78 GPIO_05 I/O GPIO05 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 68 GPIO_06 I/O GPIO06 Configurable GPIO CMOS 2.6V 2mA INPUT LOW HIGH 73 GPIO_07 I/O GPIO07 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 67 GPIO_08 I/O GPIO08 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 76 GPIO_09 I/O GPIO09 Configurable GPIO CMOS 2.6V 2mA INPUT LOW HIGH 63 GPIO_10 I/O GPIO10 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 57 GPIO_11 I/O GPIO11 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 62 GPIO_12 I/O GPIO12 Configurable GPIO CMOS 2.6V 2mA INPUT LOW HIGH 77 GPIO_13 I/O TGPIO_1 I/O GPIO13 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW GPIO14 Configurable GPIO CMOS 2.6V 2mA INPUT LOW HIGH 61 GPIO_15 I/O GPIO15 Configurable GPIO CMOS 2.6V 2mA INPUT LOW HIGH 75 GPIO_16 I/O GPIO16 Configurable GPIO CMOS 2.6V 2mA INPUT LOW HIGH 71 GPIO_17 I/O GPIO17 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 65 GPIO_18 I/O GPIO18 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 60 Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Note Alternate Function (RF Transmission Control) Alternate Function (RFTXMON) Alternate function (ALARM) Alternate function (BUZZER) Page 52 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 56 GPIO_19 I/O GPIO19 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 58 GPIO_20 I/O GPIO20 Configurable GPIO CMOS 2.6V 2mA INPUT LOW LOW 72 GPIO_21 I/O GPIO21 Configurable GPIO CMOS 2.6V 2mA INPUT HIGH HIGH 64 GPIO_22 I/O GPIO22 Configurable GPIO CMOS 1.8V (not 2.6V) 2mA INPUT LOW HIGH Not all GPIO pads support all these three modes: • GPIO4 supports all three modes and can be input, output, RF Transmission Control (Alternate function) • GPIO5 supports all three modes and can be input, output, RFTX monitor output (Alternate function) • GPIO6 supports all three modes and can be input, output, alarm output (Alternate function) • GPIO7 supports all three modes and can be input, output, buzzer output (Alternate function) Some alternate functions for UC864-E-AUTO / AWS-AUTO may be added if needed. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 53 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.1. Logic Level Specifications Where not specifically stated, all the interface circuits work at 2.6V CMOS logic levels. The following table shows the logic level specifications used in the UC864-E-AUTO / AWS-AUTO interface circuits: Absolute Maximum Ratings - Not Functional UC864UC864- E- AUTO / AWSAWS -AUTO Parameter Min Max Input level on any digital pin when on Input voltage on analog pins when on -0.3V +3.0V -0.3V +3.0 V For 2.6V CMOS signals; Operating Range - Interface levels UC864UC864- E- AUTO / AWSAWS -AUTO Level Min Max Input high level 2.0V 2.9 V Input low level Output high level Output low level -0.3V 2.15V 0V 0.6V 2.6V 0.45V For 1.8V signals: Operating Range - Interface levels (1.8V CMOS) UC864UC864- E- AUTO / AWSAWS -AUTO Level Min Max Input high level 1.5V 2.1V Input low level Output high level Output low level -0.3V 1.35V 0V 0.5V 1.8V 0.45V Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 54 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.2. 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 2.6V CMOS levels of the GPIO. If the digital output of the device is connected with the GPIO input, the pad has interface levels different from the 2.6V CMOS. It can be buffered with an open collector transistor with a 47KΩ pull-up resistor to 2.6V. 12.3. Using a GPIO Pad as Output The GPIO pads, when used as outputs, can drive 2.6V CMOS digital devices or compatible hardware. When set as outputs, the pads have a push-pull output and therefore the pull-up resistor may be omitted. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 55 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.4. 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 it is necessary to add a pull up resistor (47K to PWRMON). 12.5. Using the RFTXMON Output GPIO5 The GPIO5 pin, when configured as RFTXMON Output, is controlled by the UC864-EAUTO / AWS-AUTO module and will rise when the transmitter is active and fall after the transmitter activity is completed. For example, if a call is started, the line will be HIGH during all conversations and it will be again LOW after hanged up. The line rises up 300ms before first TX burst and will become again LOW from 500ms to 1sec after last TX burst. 12.6. Using the Alarm Output GPIO6 The GPIO6 pad, when configured as Alarm Output, is controlled by the UC864-EAUTO / AWS-AUTO module and will rise when the alarm starts and fall after the issue of a dedicated AT command. This output can be used to power up the UC864-E-AUTO / AWS-AUTO controlling microcontroller or application at the alarm time, giving you the possibility to program a timely system wake-up to achieve some periodic actions and completely turn off either the application or the UC864-E-AUTO / AWS-AUTO during sleep periods. This will dramatically reduce the sleep consumption to few µA. In battery-powered devices this feature will greatly improve the autonomy of the device. NOTE: During RESET the line is set to HIGH logic level. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 56 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.7. 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”. send the command AT#GPIO=7, 1, 2: wait for response OK send the command AT#SRP=3 The GPIO7 pin will be set as Alternate Function pin with its dummy logic status set to HIGH value. The "Alternate function” permits your application to easily implement Buzzer feature with some small hardware extension of your application as shown in the next sample figure. NOTE: To correctly drive a buzzer, a driver must be provided. its characteristics depend on the buzzer. Refer to your buzzer vendor. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 57 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.8. Magnetic Buzzer Concepts 12.8.1. 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. 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 as relative to the frequency applied. Diaphragm movement. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 58 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.8.2. Frequency Behavior 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. 12.8.3. Power Supply Influence After applying a signal with a different amplitude from suggested by the manufacturer, a performance change will follow, according to the rule “if resonance frequency fo increases, amplitude decreases”. Because resonance frequency depends on acoustic design and lowering the amplitude of the driving signal, the response bandwidth tends to become narrow, and vice versa. Summarizing: Vpp ↑ fo ↓ Vpp fo ↑ The risk is that the fo could easily fall outside of new bandwidth; consequently the SPL could be much lower than the expected. WARNING: WARNING It is very important to respect the sense of the applied voltage: never apply to the "-" pin a voltage more positive than "+" pin. If this happens, the diaphragm vibrates in the opposite sense with a high probability to be expelled from its physical position. This damages the device permanently. 12.8.4. Working Current Influence In the component data sheet you will find the value of MAX CURRENT: this represents the maximum average current that can flow at nominal voltage without current limitation. In other words it is not the peak current, which could be twice or three times higher. If driving circuitry does not support these peak values, the SPL will never reach the declared level or the oscillations will stop. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 59 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.9. Using the Temperature Monitor Function 12.9.1. 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 raises to High Logic level a GPIO when the maximum temperature is reached. 12.9.2. Allowed GPIO The AT#TEMPMON set command could be used with one of the following GPIO: Signal Function Type GPIO_01 GPIO01 Configurable GPIO CMOS 2.6V Drive strength 2mA GPIO_03 GPIO03 Configurable GPIO CMOS 2.6V 2mA GPIO_08 GPIO08 Configurable GPIO CMOS 2.6V 2mA GPIO_09 GPIO09 Configurable GPIO CMOS 2.6V 2mA GPIO_10 GPIO10 Configurable GPIO CMOS 2.6V 2mA GPIO_11 GPIO11 Configurable GPIO CMOS 2.6V 2mA GPIO_12 GPIO12 Configurable GPIO CMOS 2.6V 2mA GPIO_13 GPIO13 Configurable GPIO CMOS 2.6V 2mA GPIO_14 GPIO14 Configurable GPIO CMOS 2.6V 2mA GPIO_15 GPIO15 Configurable GPIO CMOS 2.6V 2mA GPIO_16 GPIO16 Configurable GPIO CMOS 2.6V 2mA GPIO_17 GPIO17 Configurable GPIO CMOS 2.6V 2mA GPIO_18 GPIO18 Configurable GPIO CMOS 2.6V 2mA GPIO_19 GPIO19 Configurable GPIO CMOS 2.6V 2mA GPIO_20 GPIO20 Configurable GPIO CMOS 2.6V 2mA GPIO22 Configurable GPIO CMOS 1.8V (not 2.6V) 2mA GPIO_22 Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Note Page 60 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 The set command could be used also with one of the following GPIO but in that case the alternate function is not usable: Signal Signal Function Type Drive strength GPIO_02 GPIO02 Configurable GPIO CMOS 2.6V 2mA GPIO_04 GPIO04 Configurable GPIO CMOS 2.6V 2mA GPIO_05 GPIO05 Configurable GPIO CMOS 2.6V 2mA GPIO_07 GPIO07 Configurable GPIO CMOS 2.6V 2mA Note Alternate function(JDR) Alternate Function (RF Transmission Control) Alternate Function (RFTXMON) Alternate function (BUZZER) Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 61 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.10. Indication of Network Service Availability The STAT_LED pin status shows information on the network service availability and Call status. In the UC864-E-AUTO / AWS-AUTO modules, the STAT_LED usually needs an external transistor to drive an external LED. Because of the above, the status indicated in the following table is reversed with respect to the pin status: LED status Permanently off Fast blinking (Period 1s, Ton 0,5s) Slow blinking (Period 3s, Ton 0,3s) Permanently on Device Status Device off Net search / Not registered / turning off Registered full service a call is active Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 62 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 12.11. 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. NOTE: NO devices must be powered from this pin. 12.12. 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. The operating range characteristics of the supply are: Operating Range – VAUX1 power supply Min Typical Output voltage Output current Output bypass capacitor (Inside the module) 2.6V Max 2.65V 2.7V 100mA Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. 2.2µF Page 63 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 13. DAC and ADC section 13.1. DAC Converter 13.1.1. Description The UC864-E-AUTO / AWS-AUTO module provides a Digital to Analog Converter. The signal (named DAC_OUT) is available on pin 40 of the UC864-E-AUTO / AWS-AUTO module and on pin 17 of PL102 on EVK2 Board (KS101C). The on board DAC is a 16-bit converter, able to generate an analogue value based on a specific input in the range from 0 up to 65535 but recalibrated in the range from 0 to 1023. However, an external low-pass filter is necessary. Voltage range (filtered) Range Min Max 2.6 1023 Units Volt Steps The precision is 1023 steps, so if we consider that the maximum voltage is 2V, the integrated voltage could be calculated with the following formula: Integrated output voltage = 2 * value / 1023 DAC_OUT line must be integrated (for example with a low band pass filter) in order to obtain an analog voltage. 13.1.2. 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. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 64 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 13.1.3. Low Pass Filter Example 13.2. ADC Converter 13.2.1. Description The on board ADCs are 8-bit converters. They are able to read a voltage level in the range of 0-2 volts applied on the ADC pin input and store and convert it into 8 bit word. Input Voltage range AD conversion Resolution Min Max < 10.2 Units Volt bits mV The UC864-E-AUTO / AWS-AUTO module provides 3 Analog to Digital Converters. The input lines are: ADC_IN1 available on Pin 37 and Pin 19 of PL102 on EVK2 Interface. ADC_IN2 available on Pin 38 and Pin 20 of PL102 on EVK2 Interface. ADC_IN3 available on Pin 39 and Pin 21 of PL102 on EVK2 Interface. 13.2.2. Using ADC Converter An AT command is available to use the ADC function. The command is AT#ADC=1,2 The read value is expressed in mV Refer to SW User Guide or AT Commands Reference Guide for the full description of this function. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 65 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 14. Mounting the module on your board The position of the Molex board-to-board connector and pin 1 are shown in the following picture. NOTE: The Metal taps present on UC864-E-AUTO / AWS-AUTO 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 66 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 14.1. Application PCB Layout To obtain the best thermal dissipation it is suggested to design the host PCB as in the below image where a Ground area has been created below the module. Bottom side Top View Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 67 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 Top side Top View Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 68 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 14.2. Clearance Area Clearance area for SMT Components 14.3. Thermal Dissipation To permit a better thermal dissipation it is suggested to use a Thermal conductive material between the module and the application PCB. Suggested types are Bergquist (Two parts) GAP filler 3500 or GAP Filler 1500 Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 69 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 14.4. Module Soldering The module could be soldered on the application in different kind of ways. Typical processes are follows: • • • Manual Soldering Automatic Selective soldering Wave soldering We suggest respecting necessary Clearance area in the design to permit a proper soldering process as shown in previous chapter. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 70 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 15. Application guide 15.1. Debug of the UC864-E-AUTO / AWS-AUTO in production To test and debug the mounting of UC864-E-AUTO / AWS-AUTO, we strongly recommend to foresee test pads on the host PCB, in order to check the connection between the UC864-E-AUTO / AWS-AUTO itself and the application and to test the performance of the module connecting it with an external computer. Depending on the customer application, these pads include, but are not limited to the following signals: • TXD • RXD • ON/OFF • RESET • GND • VBATT • TX_TRACE • RX_TRACE • PWRMON • USB_VBUS • USB_D+ • USB_D- Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 71 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 15.2. Bypass capacitor on Power supplies When a sudden voltage is asserted to or cut from the power supplies, the steep transition makes some reactions such as the overshoot and undershoot. This abrupt voltage transition can affect the device not to work or make it malfunction. The bypass capacitors are needed to alleviate this behavior and it can be affected differently according to the various applications. The customers have to pay special attention to this when they design their application board.. The length and width of the power lines need to be considered carefully and the capacitance of the capacitors need to be selected accordingly. The capacitor will also avoid the ripple of the power supplies and the switching noise caused in TDMA system like GSM. Specially the suitable bypass capacitor must be mounted on the Vbatt (Pin 1,2,3,4) and USB_VBUS (Pin 48) lines in the application board. The recommended values can be presented as; 100uF for Vbatt 10uF for USB_VBUS But the customers still have to consider that the capacitance mainly depends on the conditions of their application board. Generally more capacitance is required as the power line is longer. 15.3. SIM interface The resistor value on SIMIO pulled up to SIMVCC should be defined accordingly in order to be compliant to 3GPP specification. 6.8kohm can be recommended but it may depend on the application design.. Refer to the following document for the detail; Telit_SIM_interface_and ESD_protection_Application_note_r1 Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 72 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 15.4. EMC recommendations UC864-E-AUTO / AWS-AUTO signals are provided by some EMC protections. In any case the accepted levels are different on the pins. The characteristics are described in the following Table: Pin Signal I/O Function Contact Air ± 8KV ± 15KV Power Supply 1,2,3,4 VBATT Main power supply SIM Card Interface 18 SIMVCC External SIM signal – Power supply for the SIM ± 8KV ± 15KV 19 SIMRST External SIM signal – Reset ± 8KV ± 15KV 20 SIMIO I/O External SIM signal - Data I/O ± 8KV ± 15KV 22 SIMCLK External SIM signal – Clock ± 8KV ± 15KV AI Analog input used to sense whether a peripheral device is connected ± 8KV ± 15KV Miscellaneous Functions Functions 35 USB_ID Miscellaneous Functions 48 USB_VBUS AI Power supply for the internal USB transceiver. ± 8KV ± 15KV 50 VAUX1 Power output for external accessories ± 8KV ± 15KV 51, 52 CHARGE AI Charger input ± 8KV ± 15KV 53 ON/OFF Input command for switching power ON or OFF (toggle command). ± 8KV ± 15KV 54 RESET Reset input ± 8KV ± 15KV 55 VRTC AO Power supply for RTC block ± 8KV ± 15KV ± 8KV ± 15KV Antenna PAD Antenna Pad AI Antenna pad for Rosenberger connector All other pins have the following characteristics: HBM JESD22-A114-B ± 2000 V CDM JESD22-C101-C ± 500 V The Board to Board connector has to be considered as NO TOUCH area. Appropriate Series resistors has to be considered to protect the input lines from overvoltage. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 73 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 16. Pack Pac king system The Telit UC864-E-AUTO / AWS-AUTO is packaged on trays. Each tray contains 20 pieces with the following dimensions: NOTE: Trays can withstand the maximum temperature of 65° C. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 74 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 17. Conformity Assessment Issues The Telit UC864UC864- E- AUTO module has been assessed in order to satisfy the essential requirements of the R&TTE Directive 1999/05/EC (Radio Equipment & Telecommunications Terminal Equipments) to demonstrate the conformity against the harmonized standards with the final involvement of a Notified Body. If the module is installed in conformance to the Telit installation manuals, 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 the assessment of the final product must be made against the Essential requirements of the R&TTE Directive Articles 3.1(a) and (b), (b) Safety and EMC respectively, and any relevant Article 3.3 requirements. This Hardware User Guide contains all the information you may need for developing a product meeting the R&TTE Directive. The Telit UC864UC864- AWSAWS- AUTO 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. The UC864UC864 -AWSAWS -AUTO Module is conforming to the following US Directives: • Use of RF Spectrum. Standards: FCC 47 Part 22 (GSM 850), Part 24 (PCS 1900) and Part 27 (FDD IV) • EMC (Electromagnetic Compatibility). Standards: FCC47 Part 15 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. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 75 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 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 7.18 dBi (GSM 850), 2.78 dBi (PCS 1900) and 1.43 dBi (FDD IV) 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. The FCC requires that you be notified that any changes or modifications made to the UC864-AWSAUTO module that are not expressly approved by Telit Communications S.p.A. may void your authority to operate the equipment. Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 76 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 18. Safety Recommendations Recommendations Read carefully! Be sure about that the use of this product is allowed in your 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 be installed with the guarantee of a minimum 20 cm distance from the body. 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 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/rtte/dir99-5.htm Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 77 of 78 UC864-E-AUTO / AWS-AUTO Hardware User Guide 1vv0300795 Rev.11 – 2010/11/18 19. Document Change Log R e v i si o n Date Rev.0 Rev.1 2008/10/22 2009/04/02 Rev.2 Rev.3 2009/06/11 2009/07/08 Rev.4 Rev.5 2009/10/29 2009/11/09 Rev. 6 2010/05/06 Rev. 7 Rev. 8 Rev. 9 Rev. 10 Rev. 11 2010/07/02 2010/10/14 2010/10/25 2010/11/10 2010/11/18 Changes Initial release Updated with new HW design of solder tags, added info on Pull up/down values on I/O lines, added soldering info Updated ESD data Updated with new Module Drawings, updated ESD data, pinout. Updated Drawings of the module Updated Turning ON/OFF Updated Power supply : Consumption for GPRS/EDGE Class 12 Updated Audio section Added Buzzer concept Updated Application guide Updated Packaging Tray dimensions Updated On Off timings Corrected Note on Chapter 4.2 (was related to E version and not to EAUTO) Updated digital operating levels; added UC864-AWS-AUTO product Updated GSM/WCDMA Antenna requirement Updated 9 USB Port Added section on Temperature Ranges Conformity Assessment Issues section updated Conformity Assessment Issues section updated Section 7.1 and Conformity Assessment Issues updated Section 7.1 and Conformity Assessment Issues updated Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 78 of 78
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