HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 PRODUCT HE910 HE910-GA HE910-D HE910-EUR HE910-EUD HE910-EUG HE910-NAR HE910-NAD HE910-NAG Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 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.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 1 INTRODUCTION ......................................................................................................................................................... 7 1.1 SCOPE ................................................................................................................................................................................ 7 1.2 AUDIENCE ................................................................................
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 7.3.3 GPS Antenna Gain .................................................................................................................................................. 51 7.3.4 Active versus Passive Antenna ............................................................................................................................... 51 7.3.5 GPS Antenna - PCB Line Guidelines ...........................................................................
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 14.7.1 HE910 Solder reflow ............................................................................................................................................. 80 14.8 PACKING SYSTEM .............................................................................................................................................................. 82 14.9 MOISTURE SENSITIVITY ...........................................................................
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The aim of this document is the description of some hardware solutions useful for developing a product with the Telit HE910 module. This document is intended for Telit customers, who are integrators, about to implement their applications using our HE910 modules. For general contact, technical support, to report documentation errors and to order manuals, contact Telit’s Technical Support Center (TTSC) at: TS-EMEA@telit.com TS-NORTHAMERICA@telit.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 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: “Overview” provides an overview of the document. Chapter3: “HE910 Module Connections” deals with the pin out configuration and layout. Chapter 4: “Hardware Commands” How to operate on the module via hardware.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 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. YYYY-MM-DD.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The aim of this document is the description of some hardware solutions useful for developing a product with the Telit HE910 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.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 PAD Signal I/O Function USB differential Data (+) Type COMMENT USB HS 2.0 COMMUNICATION PORT B15 USB_D+ I/O C15 USB_D- I/O USB differential Data (-) I Power sense for the internal USB transceiver. VUSB A13 Asynchronous Serial Port (USIF0) - Prog. / Data + HW Flow Control N15 C103/TXD I Serial data input from DTE CMOS 1.8V M15 C104/RXD O Serial data output to DTE CMOS 1.8V M14 C108/DTR I Input for (DTR) from DTE CMOS 1.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 E15 SPI_MISO O SPI_MISO CMOS 1.8V F15 SPI_CLK I SPI Clock CMOS 1.8V H15 SPI_MRDY I SPI_MRDY CMOS 1.8V J15 SPI_SRDY O SPI_SRDY CMOS 1.8V C8 GPIO_01 I/O GPIO_01 /STAT LED CMOS 1.8V C9 GPIO_02 I/O GPIO_02 CMOS 1.8V C10 GPIO_03 I/O GPIO_03 CMOS 1.8V C11 GPIO_04 I/O GPIO_04 CMOS 1.8V B14 GPIO_05 I/O GPIO_05 CMOS 1.8V C12 GPIO_06 I/O GPIO_06 CMOS 1.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 A11 RESERVED - RESERVED A12 RESERVED - RESERVED B11 RESERVED - RESERVED B10 RESERVED - RESERVED A9 RESERVED - RESERVED A8 RESERVED - RESERVED D14 RESERVED - RESERVED A14 RESERVED - RESERVED WARNING: Reserved pins must not be connected.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 If not used, almost all pins should be left disconnected.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 To turn on the HE910 the pad ON_OFF* must be tied low for at least 5 seconds and then released. The maximum current that can be drained from the ON# pad is 0,1 mA. A simple circuit to do it is: NOTE: Don't 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 HE910 power regulator and improper power on/off of the module.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 NOTE: In this document all the lines that are inverted, hence have active low signals are labelled with a name that ends with”#",”*” or with a bar over the name. TIP: To check if the device has powered on, the hardware line PWRMON should be monitored. NOTE: It is mandatory to avoid sending data to the serial ports during the first 200ms of the module start-up. Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 A flow chart showing the proper turn on procedure is displayed below: Modem ON Proc. Y PWMON = ON? DELAY= 300mSec N Enter AT ON_OFF = LOW Y Delay = 5 Sec AT answer in 1Sec ? ON_OFF = HIGH N N PWMON = ON? AT init sequence. HW unconditional SHUTDOWN Y Delay 1s Start AT CMD.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 A flow chart showing the AT command managing procedure is displayed below: Start AT CMD. DELAY= 300mSec Enter AT Y AT answer in 1Sec ? AT init sequence. N HW unconditional SHUTDOWN Modem ON Proc. Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 For example: 1- Let's assume you need to drive the ON# pad with a totem pole output of a +3/5 V microcontroller (uP_OUT1): 2- Let's assume you need to drive the ON# pad directly with an ON/OFF button: Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Turning off of the device can be done in two ways: via AT command (see HE910 Software User Guide, AT#SHDN) by tying low pin ON_OFF* Either ways, the device issues a detach request to network informing that the device will not be reachable any more. To turn OFF the HE910 the pad ON_OFF* must be tied low for at least 2 seconds and then released. TIP: To check if the device has been powered off, the hardware line PWRMON must be monitored.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The following flow chart shows the proper turn off procedure: Modem OFF Proc. N PWMON = ON? Y ON_OFF = LOW Delay = 2 Sec ON_OFF = HIGH N Modem ON Proc. PWMON = ON? Y Delay 15s Y PWMON = ON? HW unconditional SHUTDOWN N Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The Unconditional Shutdown of the module could be activated using the HW_SHUTDOWN* line (pad R13). WARNING: The hardware unconditional Shutdown must not be used during normal operation of the device since it does not detach the device from the network. It shall be kept as an emergency exit procedure. To unconditionally shutdown the HE910, the pad HW_SHUTDOWN* must be tied low for at least 200 milliseconds and then released.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 A typical circuit is the following: For example: 1- Let us assume you need to drive the HW_SHUTDOWN* pad with a totem pole output of a +3/5 V microcontroller (uP_OUT2): 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 HE910 when the module is powered off or during an ON/OFF transition. Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 In the following flow chart is detailed the proper restart procedure: HW unconditional SHUTDOWN HW_SHUTDOWN*= LOW = LOW Delay 200ms HW_SHUTDOWN*= HIGH N PWRMON = ON Modem ON Proc. Y Delay 1s Disconnect PWR supply Modem ON Proc. Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The Unconditional Restart of the module could be activated using the RESET* line (pad P11). WARNING: The hardware unconditional Restart must not be used during normal operation of the device since it does not detach the device from the network. It shall be kept as an emergency exit procedure. To unconditionally Restart the HE910, the pad RESET* must be tied low for at least 200 milliseconds and then released.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 A typical circuit is the following: For example: 1- Let us assume you need to drive the RESET* pad with a totem pole output of a +3/5 V microcontroller (uP_OUT2): 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 HE910 when the module is powered off or during an ON/OFF transition. Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 In the following flow chart is detailed the proper restart procedure: HW unconditional Restart Reset* = LOW Delay 200ms Reset* = HIGH N PWRMON = ON Modem Startup Y Delay 1s Disconnect PWR supply Modem ON Proc. Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances, hence read carefully the requirements and the guidelines that will follow for a proper design.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 HE910 Mode SWITCHED OFF Switched Off AT+CFUN=5 AT+CFUN=1 AT+CFUN=4 AT+CFUN=5 WCDMA Voice WCDMA HSDPA (0dBm) WCDMA HSDPA (22dBm) EDGE 4TX+2RX GSM900 PL5 DCS1800 PL0 Average (mA) 40uA Mode description Module supplied but Switched Off IDLE mode (WCDMA) Disabled TX and RX; DRX7 IDLE mode (GSM/EDGE) 19 Normal mode: full functionality of the module 16.5 Disabled TX and RX; module is not registered on the network 0.8 Disabled TX and RX; DRX9 (1.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The principal guidelines for the Power Supply Design embrace three different design steps: the electrical design the thermal design the PCB layout. The electrical design of the power supply depends strongly from the power source where this power is drained. We will distinguish them into three categories: +5V input (typically PC internal regulator output) +12V input (typically automotive) Battery The desired output for the power supply is 3.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 An example of linear regulator with 5V input is: The desired output for the power supply is 3.8V, hence due to the big difference between the input source and the desired output, a linear regulator is not suited and shall not be used. A switching power supply will be preferable because of its better efficiency especially with the 2A peak current load represented by the HE910.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 An example of switching regulator with 12V input is in the below schematic: Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The desired nominal output for the power supply is 3.8V and the maximum voltage allowed is 4.2V, hence a single 3.7V Li-Ion cell battery type is suited for supplying the power to the Telit HE910 module. WARNING: 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 the HE910 and damage it.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The thermal design for the power supply heat sink should be done with the following specifications: Average current consumption during HSDPA transmission @PWR level max : 600 mA Average current during idle: 1.5 mA NOTE: The average consumption during transmissions depends on the power level at which the device is requested to transmit by the network. The average current consumption hence varies significantly.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 As seen on the electrical design guidelines the power supply shall have a low ESR capacitor on the output to cut the current peaks and a protection diode on the input to protect the supply from spikes and polarity inversion. The placement of these components is crucial for the correct working of the circuitry. A misplaced component can be useless or can even decrease the power supply performances.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Band GSM 850 GSM 900 DCS1800 PCS 1900 WCDMA FDD B1 WCDMA FDD B2 WCDMA FDD B4 WCDMA FDD B5 WCDMA FDD B8 Typical -109.5 dBm -109 dBm -110 dBm -109.5 dBm -111 dBm -110 dBm -111 dBm -111 dBm -110 dBm Note BER Class II <2.44% BER Class II <2.44% BER Class II <2.44% BER Class II <2.44% BER <0.01% BER <0.01% BER <0.01% BER <0.01% BER <0.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 In the case the antenna is not directly connected at the antenna pad of the HE910, then a PCB line is needed in order to connect with it or with its connector.
HE910 Hardware User Guide 1vv0300925 Rev.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 This product is including an input for a second RX antenna to improve the radio sensitivity. The function is called Antenna Diversity.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 module is integrating a GPS receiver that could be used in Standalone mode and in A-GPS (assisted GPS). With the help of advanced digital signal processing algorithms and the use of A-GPS data, the receiver is capable to achieve sensitivity values of better than -165 dBm as is required for indoor applications.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The Pads related to this function are the following: PAD Signal I/O Function Type R9 ANT_GPS I GPS Antenna (50 ohm) RF R7 GPS_LNA_EN O Output enable for External LNA supply CMOS 1.8V The HE910 Module contains an integrated LNA and pre-select SAW filter. This allows the module to work well with a passive GPS antenna.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 However, the GPS signal is heavily influenced by attenuation due to foliage such as tree canopies, etc., as well as outright blockage caused by building, terrain or other items in the line of sight to the specific GPS satellite. This variable attenuation is highly dependent upon GPS satellite location.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Antenna gain is defined as the extra signal power from the antenna as compared to a theoretical isotropic antenna (equally sensitive in all directions). For example, a 25mm by 25m square patch antenna on a reference ground plane (usually 70mm by 70mm) will give an antenna gain at zenith of 5 dBic. A smaller 18mm by 18mm square patch on a reference ground plane (usually 50mm by 50mm) will give an antenna gain at zenith of 2 dBic.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Ensure that the antenna line impedance is 50ohm. Keep the antenna line on the PCB as short as possible to reduce the loss. Antenna line must have uniform characteristics, constant cross section, avoid meanders and abrupt curves. Keep one layer of the PCB used only for the Ground plane, if possible. Surround (on the sides, over and under) the antenna line on PCB with Ground, avoid having other signal tracks facing directly the antenna line of track.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 module contains a SAW filter used in a pre-select configuration with the built-in LNA, that is, the RF input of the HE910 ties directly into the SAW filter. Any circuit connected to the input of the HE910 would see complex impedance presented by the SAW filter, particularly out of band, rather than the relatively broad and flat return loss presented by the LNA.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 is already provided by an internal LNA. In case the Application needs to include an additional LNA stage, the module is provided by a digital signal usable to enable the power supply of the external amplifier. The signal is set to High only when the GPS receiver is active. The electrical characteristics of the GPS_LNA_EN signal are: Level Min Max Output high level 1.6V 1.9 Output low level 0V 0.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Shielding the RF circuitry generally is ineffective because the interference is getting into the GPS antenna itself, the most sensitive portion of the RF path. The antenna cannot be shielded because then it can’t receive the GPS signals. There are two solutions, one is to move the antenna away from the source of interference or the second is to shield the digital interference to prevent it from getting to the antenna.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The following table shows the logic level specifications used in the HE910 interface circuits: Absolute Maximum Ratings -Not Functional Parameter Min Max Input level on any digital pin (CMOS 1.8) with respect to ground -0.3V 3.1V Operating Range - Interface levels (1.8V CMOS) Level Min Max Input high level 1.5V 1.9V Input low level 0V 0.35V Output high level 1.6V 1.9 Output low level 0V 0.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 module is provided by two Reset lines that are described in the following table: Signal Function I/O PAD HW_SHUTDOWN* Phone Unconditional Shut Down I R13 RESET* Phone reset I P11 Unconditional Shutdown of the module. It will NOT perform the detach from the cellular network Power-cycle of the module, but will NOT perform the detach from the cellular network RESET* and HW_SHUTDOWN are used to reset the HE910.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 includes one integrated universal serial bus (USB) transceiver: USB 2.0 HS This port is compliant with the USB 2.0 specifications. The following table is listing the available signals: PAD Signal I/O Function Type B15 USB_D+ I/O USB differential Data (+) 3.3V C15 USB_D- I/O USB differential Data (-) 3.3V A13 VUSB AI Power sense for the internal USB transceiver. 5V NOTE Accepted range: 4.4V to 5.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 Module is provided by one SPI interface. The SPI interface defines two handshake lines for flow control and mutual wake-up of the modem and the Application Processor: SRDY (slave ready) and MRDY (master ready). The AP has the master role, that is, it supplies the clock. The following table is listing the available signals: PAD Signal I/O Function Type COMMENT D15 SPI_MOSI I SPI MOSI CMOS 1.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 SPI_MISO E15 SPI_MOSI D15 SPI_CLK F15 SPI_MRDY H15 HE910 SPI_SRDY J15 VDD_IO1 D13 1V8_SEL E13 D14 AP nc Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 module is provided with by 2 Asynchronous serial ports: MODEM SERIAL PORT 1 (Main) MODEM SERIAL PORT 2 (Auxiliary) Several configurations can be designed for the serial port on the OEM hardware, but the most common are: RS232 PC com port microcontroller UART @ 1.8V (Universal Asynchronous Receive Transmit) microcontroller UART @ 5V or other voltages different from 1.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The serial port 1 on the HE910 is a +1.8V UART with all the 7 RS232 signals. It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The input line ON_OFF and RESET state can be treated as in picture below NOTE: According to V.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The secondary serial port on the HE910 is a CMOS1.8V with only the RX and TX signals. The signals of the HE910 serial port are: PAD Signal I/O Function Type COMMENT D15 TX_AUX O Auxiliary UART (TX Data to DTE) CMOS 1.8V SHARED WITH SPI_MTSR E15 RX_AUX I Auxiliary UART (RX Data from DTE) CMOS 1.8V SHARED WITH SPI_MRST The signal 1V8_SEL must be connected to the VDD_IO1 input pin in order to use this port.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 In order to interface the HE910 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 0/1.8V 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.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 An example of RS232 level adaptation circuitry could be done using a MAXIM transceiver (MAX218) In this case the chipset is capable to translate directly from 1.8V to the RS232 levels (Example done on 4 signals only). The RS232 serial port lines are usually connected to a DB9 connector with the following layout: Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The Audio of the HE910 Module is carried by DVI digital audio interface. The audio port can be directly connected to end device using digital interface, or via one of the several compliant codecs (in case an analog audio is needed).
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 module is provided by a set of Digital Input / Output pins Input pads can only be read; they 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 HE910 firmware and acts depending on the function implemented.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Where not specifically stated, all the interface circuits work at 1.8V CMOS logic levels. The following table shows the logic level specifications used in the HE910 interface circuits: Absolute Maximum Ratings -Not Functional Parameter Min Max Input level on any digital pin (CMOS 1.8) with respect to ground -0.3V 3.1V Operating Range - Interface levels (1.8V CMOS) Level Min Max Input high level 1.5V 1.9V Input low level 0V 0.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 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 CMOS levels of the GPIO. If the digital output of the device to be connected with the GPIO input pad has interface levels different from the 1.8V CMOS, then it can be buffered with an open collector transistor with a 47K pull up to 1.8V.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The STAT_LED pin status shows information on the network service availability and Call status. The function is available as alternate function of GPIO_01 In the HE910 modules, the STAT_LED needs an external transistor to drive an external LED. Therefore, the status indicated in the following table is reversed with respect to the pin status.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The VRTC pin brings out the Real Time Clock supply, which is separate from the rest of the digital part, allowing having only RTC going on when all the other parts of the device are off. To this power output a backup capacitor can be added in order to increase the RTC autonomy during power off of the battery. NO Devices must be powered from this pin. Please refer to the related User Guide (SIM Holder Design Guides, 80000NT10001a).
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 is provided by one AD converter. It is able to read a voltage level in the range of 0÷1.2 volts applied on the ADC pin input, store and convert it into 10 bit word. The following table is showing the ADC characteristics: Input Voltage range AD conversion Input Resistance Input Capacitance Min 0 1 - Typical Max 1.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 modules have been designed in order to be compliant with a standard lead-free SMT process. Pin B1 Bottom view Dimensions in mm Lead-free Alloy: Surface finishing Ni/Au for all solder pads Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 TOP VIEW In order to easily rework the HE910 is suggested to consider on the application a 1.5 mm placement inhibit area around the module. It is also suggested, as common rule for an SMT component, to avoid having a mechanical part of the application in direct contact with the module. NOTE: In the customer application, the region under WIRING INHIBIT (see figure above) must be clear from signal or ground paths.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Stencil’s apertures layout can be the same of the recommended footprint (1:1), we suggest a thickness of stencil foil ≥ 120 µm. Non solder mask defined (NSMD) type is recommended for the solder pads on the PCB. Copper Pad Solder Mask PCB SMD (Solder Mask Defined) NSMD (Non Solder Mask Defined) Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The recommendation for the PCB pads dimensions are described in the following image (dimensions in mm) Solder resist openings Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 It is not recommended to place via or micro-via not covered by solder resist in an area of 0,3 mm around the pads unless it carries the same signal of the pad itself (see following figure). Inhibit area for micro-via Holes in pad are allowed only for blind holes and not for through holes. Recommendations for PCB pad surfaces: Finish Electro-less Ni / Immersion Au Layer thickness [µm] 3 –7 / 0.05 – 0.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Solder paste Lead free Sn/Ag/Cu We recommend using only “no clean” solder paste in order to avoid the cleaning of the modules after assembly. Recommended solder reflow profile: Reproduction forbidden without Telit Communications S.p.A.
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HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 modules are packaged on trays of 20 pieces each. These trays can be used in SMT processes for pick & place handling. Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Reproduction forbidden without Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910 is a Moisture Sensitive Device level 3, in according with standard IPC/JEDEC JSTD-020, take care all the relatives requirements for using this kind of components. Moreover, the customer has to take care of the following conditions: a) Calculated shelf life in sealed bag: 12 months at <40°C and <90% relative humidity (RH). b) Environmental condition during the production: 30°C / 60% RH according to IPC/JEDEC J-STD-033A paragraph 5.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910, HE910-D, HE910-GA, HE910-EUG, HE910-EUR, HE910-EUD, HE910-NAG, HE910NAR, HE910-NAD modules have been evaluated against the essential requirements of the 1999/5/EC Directive. Bulgarian Czech Danish Dutch English Estonian German Greek Hungarian Finnish French Icelandic Italian С настоящето Telit Communications S.p.A. декларира, че 2G/3G module отговаря на съществените изисквания и другите приложими изисквания на Директива 1999/5/ЕС.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Ar šo Telit Communications S.p.A. deklarē, ka 2G/3G module atbilst Direktīvas 1999/5/EK būtiskajām prasībām un citiem ar to saistītajiem noteikumiem. Lithuanian Šiuo Telit Communications S.p.A. deklaruoja, kad šis 2G/3G module atitinka esminius reikalavimus ir kitas 1999/5/EB Direktyvos nuostatas. Maltese Hawnhekk, Telit Communications S.p.A.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 The HE910-D, HE910-EUR, HE910-EUD modules are compliant with the following standards: RF spectrum use (R&TTE art. 3.2) EMC (R&TTE art. 3.1b) Health & Safety (R&TTE art. 3.1a) EN 301 511 V9.02 EN 301 908-1 V4.2.1 EN 301 908-2 V4.2.1 EN 301 489-1 V1.8.1 EN 301 489-7 V1.3.1 EN 301 489-24 V1.5.1 EN 60950-1:2006 + A11:2009 + A1:2010 + A12:2011 The HE910-NAR, HE910-NAD modules are compliant with the following standards: RF spectrum use (R&TTE art. 3.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 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) It will depend on the antenna used on the final product. EMC (R&TTE art. 3.1b) Testing Health & Safety (R&TTE art. 3.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 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.
HE910 Hardware User Guide 1vv0300925 Rev.18 – 15-06-2012 Cet appareil est conforme aux limites d'exposition aux rayonnements de la IC pour un environnement non contrôlé. L'antenne doit être installé de façon à garder une distance minimale de 20 centimètres entre la source de rayonnements et votre corps. Gain de l'antenne doit être ci-dessous: Bande de fréquence GSM 850/FDD V PCS 1900/FDD II FDD IV HE910, HE910-D 5.22 dBi 3.31 dBi 6.45 dBi HE910-GA 5.22 dBi 3.31 dBi HE910-NAR, HE910-NAD, HE910-NAG 5.
