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HC864-AUTO

Hardware User Guide

1vv0300946 Rev.4 – 2012-12-27

Summary of content (77 pages)

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HC864-AUTO Hardware User Guide 1vv0300946 Rev.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 APPLICABILITY TABLE PRODUCT HC864-AUTO Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE Notice While reasonable efforts have been made to assure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this document has been carefully checked and is believed to be entirely reliable. However, no responsibility is assumed for inaccuracies or omissions.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 Usage and Disclosure Restrictions License Agreements The software described in this document is the property of Telit and its licensors. It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement. Copyrighted Materials Software and documentation are copyrighted materials. Making unauthorized copies is prohibited by law.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 Contents 1. Introduction .................................................. 8 1.1. Scope ...................................................... 8 1.2. Audience ................................................... 8 1.3. Contact Information, Support ............................... 8 1.4. Document Organization ...................................... 9 1.5. Text Conventions .......................................... 10 1.6. Related Documents .........
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 5.2.1.2. + 12V Input Source Power Supply Design Guidelines ........ 5.2.1.3. Battery Source Power Supply Design Guidelines ............ 5.2.2. Thermal Design Guidelines.................................... 5.2.3. Power Supply PCB Layout Guidelines........................... 30 32 33 34 6. Antenna(s) ................................................... 36 6.1. GSM/WCDMA Antenna Requirements ............................ 36 6.2.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 12. DAC and ADC section ......................................... 59 12.1. DAC Converter ............................................ 59 12.1.1. .................................................................... Description 59 12.1.2. ................................................................... Enabling DAC 59 12.1.3. .................................................... Low Pass Filter Example 60 12.2. ADC Converter ....................
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 1. Introduction 1.1. Scope The aim of this document is the description of some hardware solutions useful for developing a product with the Telit HC864-AUTO module. 1.2. Audience This document is intended for Telit customers, who are integrators, about to implement their applications using our HC864-AUTO module. 1.3.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 1.4. Document Organization This document contains the following chapters: Chapter 1: “Introduction” provides a scope for this document, target audience, contact and support information, and text conventions. Chapter 2: “General Product Description” gives an overview of the features of the product. Chapter 3: “HC864-AUTO Module Connections” deals with the pin out configuration and layout.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 1.5. Text Conventions Danger – This information MUST be followed or catastrophic equipment failure or bodily injury may occur. Caution or Warning – Alerts the user to important points about integrating the module, if these points are not followed, the module and end user equipment may fail or malfunction. Tip or Information – Provides advice and suggestions that may be useful when integrating the module. All dates are in ISO 8601 format, i.e.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 2. General Product Description 2.1. Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit HC864-AUTO module. In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 2.2. HC864-AUTO 2D Mechanical Dimensions The Telit HC864-AUTO module overall dimensions are: 2.3. • Length: 36.2 mm • Width: 30 mm • Thickness: 5.1 mm Weight The module weight of HC864-AUTO is about 10.0 gram. Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 2.4. Environmental requirements 2.4.1. Temperature range Note Operating Temperature Range Storage and non-operating Temperature Range –20°C ~ +55°C The module is fully functional(*) in all the temperature range, and it fully meets the ETSI specifications. –30°C ~ +85°C The module is fully functional(*) in all the temperature range. Temperatures outside of the range –20°C ÷ +55°C might slightly deviate from ETSI specifications.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 2.5. Operating Frequency The operating frequencies in GSM850, EGSM900, DCS1800, PCS1900, WCDMA modes are conformed to the 3GPP specifications. Mode Freq. TX (MHz) Freq. RX (MHz) Channels TX - RX offset GSM850 824.2 ~ 848.8 869.2 ~ 893.8 128 ~ 251 45 MHz 890.0 ~ 914.8 935.0 ~ 959.8 0 ~ 124 45 MHz 880.2 ~ 889.8 925.2 ~ 934.8 975 ~ 1023 45 MHz DCS1800 1710.2 ~ 1784.8 1805.2 ~ 1879.8 512 ~ 885 95MHz PCS1900 1850.2 ~ 1909.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 3. HC864-AUTO Module Connections 3.1. PIN-OUT HC864-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.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 Pin Signal I/O 74 75 76 77 78 TGPIO_02 TGPIO_16 TGPIO_09 TGPIO_13 TGPIO_05 I/O I/O I/O I/O I/O Function Telit GPIO02 I/O pin Telit GPIO16 Configurable GPIO Telit GPIO9 Configurable GPIO Telit GPIO13 Configurable Telit GPIO05 Configurable GPIO USB Interface 79 USB_D+ I/O USB differential Data (+) 80 USB_D- I/O USB differential Data (-) Internal Type Pull up HC864-AUTO CMOS 1.8V CMOS 1.8V CMOS 1.8V CMOS 1.8V CMOS 2.6V 3.0V ~3.6V 3.0V ~3.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 NOTE: RI pin must be connected in order to wake up the host when a call is coming in sleep mode of host. NOTE: RESERVED pins must not be connected RTS must be connected to the GND (on the module side) if flow control is not used NOTE: If not used, almost all pins must be left disconnected.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 3.2. Antenna Connector(s) The HC864-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. Furthermore the HC864-AUTO is designed with an additional RF PAD for GPS/Diversity antenna connection. The counterpart suitable is a Rosenberger 99CI106-030L5.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 4. Hardware Commands 4.1. Turning ON the HC864-AUTO To turn on HC864-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. A simple circuit to do it is: 4.2. Initialization and Activation state Upon turning on HC864-AUTO, HC864-AUTO is not activated yet because the boot sequence of HC864-AUTO is still going on internally.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 NOTE: To check if the HC864-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# line, it is internally pulled up. Using pull up resistor may bring to latch up problems on the HC864-AUTO power regulator and improper power on/off of the module. The line ON# must be connected only in open collector configuration.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 4.3. Turning OFF the HC864-AUTO Turning off the device can be done in three ways: • by software command (see HC864-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.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 4.3.1. Shutdown by Software Command HC864-AUTO can be shut down by a software command. When a shut down command is sent, HC864-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 HC864AUTO is so it cannot be fixed definitely.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 4.3.2. Hardware Shutdown To turn OFF HC864-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, HC864-AUTO goes into the finalization state and finally will shut down PWRMON at the end of this state.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 4.3.3. Hardware Unconditional Restart To unconditionally restart HC864-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.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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 4.4. Summary of Turning ON and OFF the module Below chart describes the overall sequences for Turning ON and OFF. Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 5. Power Supply The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances. Read carefully the requirements and the guidelines that will follow for a proper design. 5.1. Power Supply Requirements The HC864-AUTO power requirements are: Power Supply Nominal Supply Voltage Max Supply Voltage Supply Voltage Range 3.8V 4.2V 3.4V – 4.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 5.2. General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps: 5.2.1. • 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: 5.2.1.1.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 An example of linear regulator with 5V input is: 5.2.1.2. + 12V Input Source Power Supply Design Guidelines • The desired output for the power supply is 3.8V, hence due to the big difference between the input source and the desired output, a linear regulator is not suited and 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 HC864AUTO.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 An example of switching regulator with 12V input is in the below schematic (it is split in 2 parts): Switching regulator Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 5.2.1.3. 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 HC864-AUTO module. The three cells Ni/Cd or Ni/MH 3.6 V Nom.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 5.2.2.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 HC864-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. As mentioned before, a GSM signal is bursty, thus, the temperature drift is more insensible than WCDMA.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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 written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 6. 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. 6.1.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 6.2. 6.3. GSM/WCDMA Antenna - Installation Guidelines • Install the antenna in a place covered by the GSM/WCDMA signal.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 6.3.2.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 7. Logic Level Specifications The following table shows the logic level specifications used in the Telit HC864-AUTO interface circuits: NOTE: Do not connect HC864-AUTO’s digital logic signal directly to OEM’s digital logic signal of with level higher than 3.0V for 2.6V CMOS signals. Do not connect HC864-AUTO’s digital logic signal directly to OEM’s digital logic signal of with level higher than 2.7V for 1.8V CMOS signals. For 2.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 Level HC864-AUTO Input high level Min 1.5V Max 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 written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 7.1. Reset Signal Signal RESET Function Phone reset I/O I PIN Number 54 RESET is used to reset the HC864-AUTO module. Whenever this signal is pulled low HC864-AUTO is reset. When the device is reset it stops all operations. After the release of the reset HC864-AUTO is unconditionally shut down, without doing any detach operations from the network where it is registered.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 8. Serial Ports The serial port on the Telit HC864-AUTO is the interface between the module and OEM hardware. 2 serial ports are available on the module: • MODEM SERIAL PORT; • MODEM SERIAL PORT 2 (DEBUG). NOTE: In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the module when is powered OFF or during an ON/OFF transition. 8.1.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 The levels for HC864-AUTO UART are the CMOS levels: Absolute Maximum Ratings -Not Functional HC864-AUTO Parameter Min Max Input level on any -0.3V +3.0V digital pin when on Input voltage on -0.3V +2.7 V analog pins when on Operating Range - Interface levels HC864-AUTO Level Min Max Input high level 2.0V 2.6 V Input low level Output high level Output low level -0.3V 2.2V 0V 0.6V 2.6V 0.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 NOTE: According to V.24, RX/TX signal names are referred to the application side, therefore on the HC864-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 HC864-AUTO serial port and vice versa for RX. 8.2.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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 2.6V DC).
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 Another level adapting method could be done using a standard RS232 Transceiver (MAX3237EAI) adding some resistors to adapt the levels on the HC864-AUTO 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. Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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 8.3. 5V UART Level Translation If the OEM application uses a microcontroller with a serial port (UART) that works at a voltage different from 2.6, then a circuitry has to adapt the different levels of the two signal sets.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 TIP: This logic IC for the level translator and 2.6V pull-ups (not the 5V one) can be powered directly from VAUX1 line of HC864-AUTO. Note that the TC7SZ07AE has open drain output; therefore the resistor R2 is mandatory. A power source of the internal interface voltage corresponding to the 2.6V CMOS high level is available at the VAUX1 pin on the connector.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 9. Audio Section HC864-AUTO module doesn’t support an analog audio interface and supports only PCM interface. HC864AUTO module can be connected to external codec through PCM interface. For further information, please refer to the “HC864-AUTO_Digital_Voice_Interface_Application_Note”. Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 10. USB Port The HC864-AUTO module includes a Universal Serial Bus (USB) transceiver, which operates at USB low-speed (1.5Mbits/sec), USB full-speed (12Mbits/sec) and USB highspeed (480Mbits/sec). It is compliant with the USB 2.0 specification and can be used for diagnostic monitoring, control and data transfers. The USB_DPLUS and USB_DMINUS signals have a clock rate of 480MHz. The signal traces should be routed carefully.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 11.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 60 TGPIO_14 I/O 61 TGPIO_15 I/O 75 TGPIO_16 I/O 71 TGPIO_17 I/O 65 TGPIO_18 I/O 56 TGPIO_19 I/O 58 TGPIO_20 I/O 72 TGPIO_21 I/O 64 TGPIO_22 I/O GPIO14 Configurable GPIO GPIO15 Configurable GPIO GPIO16 Configurable GPIO GPIO17 Configurable GPIO GPIO18 Configurable GPIO GPIO19 Configurable GPIO GPIO20 Configurable GPIO GPIO21 Configurable GPIO GPIO22 Configurable GPIO CMOS 1.8V 2mA INPUT LOW LOW CMOS 1.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 11.1. Logic Level Specifications The following table shows the logic level specifications used in the HC864-AUTO interface circuits: For 2.6V CMOS signals: Absolute Maximum Ratings -Not Functional HC864-AUTO Parameter Min Max Input level on any -0.3V +3.0V digital pin when on Input voltage on -0.3V +2.7 V analog pins when on Operating Range - Interface levels HC864-AUTO Level Min Max Input high level 2.0V 2.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 11.2. 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 1.8V/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 1.8V/2.6V CMOS.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 11.4. Using the Alarm Output GPIO6 The GPIO6 pad, when configured as Alarm Output, is controlled by the HC864-AUTO module and will rise when the alarm starts and fall after the issue of a dedicated AT command.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 11.5. Using the Temperature Monitor Function 11.5.1. 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. 11.5.2.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 11.6. Indication of Network Service Availability The STAT_LED pin status shows information on the network service availability and Call status. In the HC864-AUTO modules, the STAT_LED usually needs an external transistor to drive an external LED.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 11.7. 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. 11.8.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 12. DAC and ADC section 12.1. DAC Converter 12.1.1. Description The HC864-AUTO module provides a Digital to Analog Converter. The signal (named DAC_OUT) is available on pin 40 of the HC864-AUTO module and on pin 17 of PL102 on EVK2 Board (CS1203). The on board DAC is in the range from 0 to 1023. However, an external low-pass filter is necessary. Voltage range (filtered) Range Min 0 0 Max 1.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 12.1.3. Low Pass Filter Example . 12.2. ADC Converter 12.2.1. 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 0 - Max 2.0 8 < 8.6 Units Volt bits mV The HC864-AUTO module provides 2 Analog to Digital Converters.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 13. Accelerometer 13.1. Description HC864-AUTO has a tri-axial, low-g acceleration sensor IC which is one of the BOSCH products. It can sense the factors such as tilt, motion and shock vibration so on. Please refer to the “HC864-AUTO AT Command Reference Guide” for the detailed use. Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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 HC864-AUTO must be connected to GND. This module could not be processed with a reflow. Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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 written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 14.2. Clearance Area 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 written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 14.4. Module Soldering The module could be soldered on the application in different kind of ways. Typical processes are follows: z Manual Soldering z Automatic Selective soldering z 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 written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 15. Application guide 15.1. Debug of the HC864-AUTO in production To test and debug the mounting of HC864-AUTO, we strongly recommend to foresee test pads on the host PCB, in order to check the connection between the HC864-AUTO itself and the application and to test the performance of the module connecting it with an external computer.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 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.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 15.4. EMC recommendations HC864-AUTO signals are provided by some EMC protections. In any case the accepted levels are different on the pins.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 15.5. Download and Debug Port One of the following options should be chosen in the design of host system in order to download or upgrade the Telit’s software and debug HC864-AUTO when HC864-AUTO is already mounted on a host system. Users who use both of UART and USB interfaces to communicate HC864-AUTO - Must implement a download method in a host system for upgrading HC864-AUTO when it’s mounted.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 16. Packing system The Telit HC864-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 written authorization from Telit Communications S.p.A. - All Rights Reserved.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 17. Conformity Assessment Issues 17.1. 1999/5/EC Directive The HC864-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.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 Final product integrating this module must be assessed against essential requirements of the 1999/5/EC (R&TTE) Directive. It should be noted that assessment does not necessarily lead to testing. Telit Communications S.p.A. recommends carrying out the following assessments: RF spectrum use (R&TTE art. 3.2) EMC (R&TTE art. 3.1b) Health & Safety (R&TTE art. 3.1a) It will depend on the antenna used on the final product.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 17.2. FCC/IC Regulatory notices Modification statement Telit has not approved any changes or modifications to this device by the user. Any changes or modifications could void the user’s authority to operate the equipment. Telit n’approuve aucune modification apportée à l’appareil par l’utilisateur, quelle qu’en soit la nature. Tout changement ou modification peuvent annuler le droit d’utilisation de l’appareil par l’utilisateur.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 FCC Class B digital device notice This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 18. Safety 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.
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HC864-AUTO Hardware User Guide 1vv0300946 Rev.4 – 2012-12-27 19. Document History Revision 0 1 Date 2011-05-18 2011-07-07 2 2012-01-25 3 2012-10-31 4 2012-12-27 Changes First issue Renumbered chapters Added 2 General Product Description Updated 5.1 Power Supply Requirements Updated 5.2.2 Thermal Design Guidelines Added 9 Audio Section Added 13.1 Application PCB layout Added 13.