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Cinterion DSB75 Hardware Description

Development support board
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DSB75
Development Support Board
Rev. B1
Version:
v12
DocID:
DSB75_hd_v12

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Summary of Contents for Cinterion DSB75

  • Page 1 DSB75 Development Support Board Rev. B1 Version: DocID: DSB75_hd_v12...
  • Page 2 ANY EVENT THE PROVISIONS OF THE RELEASE NOTE SHALL PREVAIL. THIS DOCUMENT CONTAINS INFORMATION ON CINTERION PRODUCTS. THE SPECIFICATIONS IN THIS DOCUMENT ARE SUBJECT TO CHANGE AT CINTERION'S DISCRETION. CINTERION WIRELESS MODULES GMBH GRANTS A NON-EXCLUSIVE RIGHT TO USE THE PRODUCT. THE RECIPIENT SHALL NOT TRANSFER, COPY, MODIFY, TRANSLATE, REVERSE ENGINEER, CREATE DERIVATIVE WORKS;...

  • Page 3: Table Of Contents

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Contents Document History ...................... 7 Introduction .......................12 Supported Products ...................12 Related Documents....................12 Scope of Delivery ....................13 1.3.1 Standard package DSB75 Development Support Board ......13 1.3.2 Product specific accessories ..............13 Terms and Abbreviations ...................14...
  • Page 4 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.14.2 Power Supply for DSB75 and GSM Module..........62 3.14.3 Battery Powered Operation of GSM Module.........63 3.14.3.1 Charging the Battery.............63 3.14.3.2 Charging Circuit..............64 3.14.4 Real Time Clock Supply ...............65 3.14.5 Adjusting the V Supply Voltage for the GSM Module.....66...
  • Page 5 Figure 45: Illustration of positions to cut the trace for jumpers X203 and X122 ....76 Figure 46: Mounting GSM module (MC75, TC63, TC65) onto the DSB75......77 Figure 47: Top view on DSB75 with connected GSM module (MC75, TC63 or TC65) and RF cable ..........................78 Figure 48: Turn on circuit .....................79...
  • Page 6 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Tables Table 1: Standard package DSB75 Development Support Board ........13 Table 2: Terms and abbreviations ..................14 Table 3: Key features ......................16 Table 4: Interfaces of the DSB75 ..................21 Table 5: Pin assignment of B2B connector X100 ..............24 Table 6: Pin assignment –...

  • Page 7: Document History

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Document History Preceding document: "DSB75 Development Support Board Rev B1 Hardware Description", v11 New document: "DSB75 Development Support Board Rev. B1 Hardware Description" Version v12 Chapter What is new Added further supported products.

  • Page 8: Table 11: Pin Assignment Of 1St Serial Interface Com1 (X201)

    Chapter What is new Modified section “Toggling low-high state of DTR”. Table 35: DSB75 technical data: Added Ignition key, Emergency key, Ignition via DTR, Ignition via USB Preceding document: "DSB75 Development Support Board Rev B1 Hardware Description", v05 New document: "DSB75 Development Support Board Rev. B1 Hardware Description" Version v06...
  • Page 9 Table 23: Pin assignment of the SPI interfaces X510 – corrected pin names Table 32: Overview of switch positions – corrected the functions of several switches Preceding document: "DSB75 Development Support Board Rev B1 Hardware Description", v03 New document: "DSB75 Development Support Board Rev. B1 Hardware Description" v04...
  • Page 10 Modified figure: ”Analog interface” 3.14 Modified figure: ”Power supply interface” 3.14.1 Modified information in Table 25, row “Power supply of digital part of DSB75”. Added new row in Table 25: “Digital IO supply (VDD)”” 3.14.2 Corrected information about power indication.
  • Page 11 Start-up by plugging the USB cable is only effective if the RS-232 lines are deactivated by the host application (e.g. if the terminal program is closed). In later releases of DSB75 this problem will be solved.” Modified figure: “Turn on circuit”. Added information about automatic restart of the module.

  • Page 12: Introduction

    GSM module are not ESD protected. Because of these current limitations, take care that the device is only used by authorized staff. Note: The document is only valid for the DSB75 Rev. B1. DSB75 Rev. A2 boards are no longer considered in the document.

  • Page 13: Scope Of Delivery

    Screws M2 (DIN 84 – ISO 1207) Insulating spacers for M2, self-gripping 1.3.2 Product specific accessories Some products require additional cables which are not part of the standard DSB75 package, but are supplied separately: AC65, AC75, XT65, XT75: Flat flexible cable (100 mm) for connecting the module to the board-to-board connector located on the DSB75 board.

  • Page 14: Terms And Abbreviations

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Terms and Abbreviations Table 2: Terms and abbreviations Abbreviation Description Analog-to-Digital Converter Asynchronous Serial Controller Board-to-Board connector Conformité Européene (European Conformity) Circuit Switched Data Clear to Send Digital-to-Analog Converter...
  • Page 15 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Abbreviation Description Request to Send Receive Direction Specific Absorption Rate SCLK Serial Clock Secure Digital SELV Safety Extra Low Voltage Subscriber Identification Module RF connector system: SubMiniature version A...

  • Page 16: General Overview

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released General Overview Key Features at a Glance Table 3: Key features Feature Implementation GSM module interface • Direct connection and mechanical fixing of GSM module via 80-pin board-to-board connector and screws.
  • Page 17 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Feature Implementation DAC output • One analog output for DC or AC voltages • Filtered PWM signal • Signal indication 23 LEDs are available for signal indication • Two LEDs for on/off indication •...

  • Page 18: System Overview

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released System Overview Power Supply USB A COM4 COM2 COM1 COM3 Relay box X400 X201 X205 X110 X401 X202 USB B ASC1 ASC0 ASC2 Power supply Digital aud io measurement 9V...15V...

  • Page 19: Location Of Connectors, Switches, Jumpers, Leds, Adjustable Resistors

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Location Connectors, Switches, Jumpers, LEDs, Adjustable Resistors (X111 bottom side) X201 X205 X202 X110 X401 X400 X203 X120 S112 X121 S110 S111 V457 V450 SD_D0 (GPIO1) not_used V451 V456...

  • Page 20: Block Diagram

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Block Diagram Test points 8 pin 2x40 pole CCxxx for future use USB-OTG USB Mini A/B Chip USB_DN, USB_DP, VUSB_IN VBUS_B USB B ASC2/GPIO RXD2_GPIO9, TXD2_GPIO10 RS232 SD_xxx(GPIO1-6) SD / GPIO...

  • Page 21: Interface Overview

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 3: Block diagram Interface Overview Table 4: Interfaces of the DSB75 Interface Reference Description number S421 Ignition push button Emergency S420 Emergency reset push button reset Handset X502 Audio interface 1 (4-pin western jack).
  • Page 22 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Interface Reference Description number I²C X511 3V and 5V I²C interface (10 pole dual strip SPI1/2 X510 SPI interface 1 and 2 (10 pole dual strip X703 DAI (digital audio interface)

  • Page 23: Description Of Dsb75 Interfaces

    The Molex board-to-board connector X100 on the DSB75 is an 80-pin double-row receptacle. Figure 4 shows the names and positions of the pins on the DSB75. The pin allocation is identical to the GSM module, but pin names may be different.

  • Page 24: Table 5: Pin Assignment Of B2B Connector X100

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Table 5: Pin assignment of B2B connector X100 Pin no. Signal name Signal name Pin no. Note: The electrical DAC_OUT ADC1_IN characteristics of this PWR_IND ADC2_IN interface meet the...

  • Page 25: Test Points

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Test Points All module pins at the B2B connector X100 are connected 1:1 to the pin headers X101, X102. They may be used for connecting measurement equipment, customized host interfaces or as access points to GPIOs, DAC, ADCs, audio lines, etc.

  • Page 26: Table 6: Pin Assignment - B2B Connector X100 And Test Points X101

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Table 6: Pin assignment – B2B connector X100 and test points X101 X100 pin Signal name X101 test Signal name X100 pin Note: number point number The electrical DAC_OUT...

  • Page 27: Gpio Lines

    Confidential / Released GPIO Lines The DSB75 board has 10 GPIO facilities (see Figure 7). Which of them are used depends on the type of GSM module and the software configuration. If the GPIO lines are configured as input, the level may be set to 0 or 1 by S460 - S469.

  • Page 28: Figure 8: Gpio - Location Of Switches And Leds

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released S110 V457 SD_D0 (GPIO1) V450 V456 V451 SD_D1 (GPIO2) V452 I2CDAT V504 SD_D2 (GPIO3) V503 V453 I2CCLK SD_D3 (GPIO4) V454 SD_CLK (GPIO5) V455 SD_CMD (GPIO6) Figure 8: GPIO - location of switches and LEDs...

  • Page 29: Sim Card Interface

    The DSB75 has an integrated SIM card interface. An appropriate SIM card (3V or 1.8V) is required to start the GSM module. The SIM card holder X503 placed on the DSB75 is from type Molex. To open the card holder simply press the yellow pin.

  • Page 30: Figure 10: Pin Location Of The Molex Sim Card Holder And Test Pins

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 10: Pin location of the Molex SIM card holder and test pins Table 10: Pin assignment – SIM card holder X503 and test pins X501 Pin number on...

  • Page 31: Rs-232 Interfaces

    COM3 (ASC2) The status of all interface lines is indicated by LEDs (refer to section 4). For using ASCx lines on the test pins X101, X102 without the DSB75 level converter please disable receiver outputs by removing jumpers X204 and X206.

  • Page 32: Figure 12: Location Of The Rs-232 Interfaces And Switches

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Common COM1 COM2 COM3 (X201) (X202) (X205) X201 X205 X202 X203 X120 S110 X206 X204 X703 S201 S200 X554 X561 X562 X560 X101 X102 S713 S712 S300 S302 S304 S306...

  • Page 33: Serial Interface 1 (Com1)

    Serial Interface 1 (COM1) The 1 serial interface COM1 (X201) of the DSB75 is intended for the communication between the GSM module and the host application. This RS-232C interface is a data and control interface for transmitting data, AT commands and providing multiplexed channels etc.

  • Page 34: Serial Interface 2 (Com2)

    Serial Interface 2 (COM2) The 2 serial interface COM2 (X202) of the DSB75 is intended for the communication between the GSM module and the host application. This RS-232C interface includes only the data lines RXD/TXD for transmitting GPRS data and AT commands, and the two control lines RTS/CTS.

  • Page 35: Debug Interface (Com3)

    3.5.3 Debug Interface (COM3) The debug interface COM3 (X205) of the DSB75 is reserved for internal software debugging. It is a two wire interface with data lines only. A level converter D201 adapts and inverts the V.24 signals (2.9V level) from the GSM module to RS-232C level.

  • Page 36: Analog Audio Interfaces

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Analog Audio Interfaces The DSB75 comprises two analog audio interfaces. Both audio interfaces are providing a supply circuit to feed an active microphone. Figure 14 shows the simplified interface schematic.

  • Page 37: Audio Interface 1 (Handset)

    MICP Microphone not inverted The Votronic handset is the reference handset used with the DSB75. Acoustic approval of the DSB75 module applies to the reference configuration comprising the Votronic handset and the DSB75. GSM applications that incorporate audio devices other than the reference handset must be submitted for additional type approval.

  • Page 38: Audio Interface 2 (Headset Or Speakerphone Operation)

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.6.2 Audio Interface 2 (Headset or Speakerphone Operation) The unbalanced audio interface 2 is designed for use with headsets or speakerphones. The interface is available on the 12-pin Lumberg connectors X700 and X701. The pin assignment of the Lumberg jacks is shown in Table 15.

  • Page 39: Speakerphone Operation

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.6.2.2 Speakerphone Operation The speakerphones which are currently available for the audio interface 2 are the “Siemens Car Kit Portable” and “Siemens Car Kit Portable HKP-500”. The plug of “Siemens Car Kit portable HKP-500” is compatible to Lumberg connector X701.

  • Page 40: Microphone Circuit (Feeding Bridges)

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.6.3 Microphone Circuit (Feeding Bridges) This section describes the microphone signal path through feeding bridges. The location of the audio connectors can be seen in Figure 14. Figure 17 shows the principal circuit of microphone feeding bridges.

  • Page 41: Digital Audio Interface

    GSM module and the customer application. The DAI of the GSM module is designed for use with a codec or a DSP. The DSB75 provides different facilities to connect the GSM module and the system environment: the 10 pin DAI connector X703 and the pin headers (X101, X102).

  • Page 42: Figure 20: Example For Connecting Measurement Equipment

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Table 16: Pin assignment of the USC/DAI interface X703 Signal name PCM Interface Type Approval DAI Remark 5.0V supply for external circuit 2.9V supply for external circuit DAI0 (USC0)

  • Page 43: Usb Device Interface

    USB connectors, switches, jumper and the pin location. Electrical characteristics are specified in section 8. DSB75 provides a USB B receptacle to connect a host device. The USB lines VBUS, D+, D- are connected directly to the GSM module via slide switches S110 - S112 (position 3).

  • Page 44: Figure 22: Location Of The Usb Interface, Switches And Jumper

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released X201 X205 X110 X401 X400 1 4 2 3 X120 S112 X121 S110 S111 Figure 22: Location of the USB interface, switches and jumper Table 17: Pin assignment of USB device interface X110...

  • Page 45: I²C Interface

    GSM module, see section 3.11). The I²C interface lines are available on the DSB75 at the 10 pin header X511. A level shifter V500/V501 converts from 3V up to 5V logic. The 3V logic lines are connected directly to the pins of the pin header X511, if switches S500 and S501 are set to position 1.

  • Page 46: Figure 23: I²C Interface

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 10 pole pin X511 I2C_CLK_3V, V504 (DAT) I2C_DAT_3V V503 (CLK) 0=on 1=off level shifter: 8,10 X100 V500/ 11,70 V501 I2CCLK, S500, I2CDAT S501 I2C_CLK_5V, I2C_DAT_5V D500 SCL,SDA Address S502 (A0),...

  • Page 47: Table 18: Pin Assignment Of The I²C Interface X511

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Table 18: Pin assignment of the I²C interface X511 X511 Name Description X100 signal Config. Remark name switches I2C_CLK_5V Clock, I2CCLK S500:3 EEPROM (5V logic) accessible External pull-up resistor 3k3...

  • Page 48: Sd Card Interface

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.10 SD Card Interface The SD card interface provides a card reader for SD (Secure Digital) memory cards. It has a smooth push-push mechanism with front cover retention for temper-resistant card insertion.

  • Page 49: Figure 26: Location Of Slide Switches And Card Reader Pins

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released S110 9 10 X703 S200 X554 S201 X561 X562 X560 X102 X101 S713S712 S300S302S304S306 S717S716 S303 S305 S307 S301 S731 S730 X500 11 10 8 7 6 5 4 3 2 1 9...

  • Page 50: Sd 4 Bit Mode

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.10.1 SD 4 Bit Mode Table 19: Pin assignment of SD card interface X301 (SD 4 bit mode) X301 X301 Description Remark X100 Configuration signal signal switches name name...

  • Page 51: Sd 1 Bit Mode

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.10.2 SD 1 Bit Mode Table 20: Pin assignment of SD card interface X301 (SD 1 bit mode) X301 X301 Description Remark X100 Configuration signal signal switches name name...

  • Page 52: Spi Bus Mode

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released 3.10.3 SPI Bus Mode This interface is an option and an alternative to the ASC1 and SPI2 interfaces. It has to be reconfigured via AT commands as SPI bus mode SD card interface. For further information refer to section 3.11.

  • Page 53: Serial Peripheral Interfaces

    (DI), serial data output (DO) and serial clock (SCLK). The GSM module may provide two different SPI interfaces available alternatively to the I²C-, and ASC1- lines (depending on software configuration). On the DSB75, they are available on the 10 pin X510 pin header.

  • Page 54: Figure 28: Spi Interfaces Location And Related Switches

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released S110 9 10 X703 S200 X554 S201 X561 X562 X560 X102 X101 S713 S712 S300S302S304S306 S717S716 S301 S303 S305 S307 Figure 28: SPI interfaces location and related switches Table 23: Pin assignment of the SPI interfaces X510...

  • Page 55: Analog Interface

    A filter circuit 2 order smoothes the PWM signal. • The filter on the DSB75 is optimized for 8.125kHz PWM frequency and can be removed by customer. Therefore the jumpers X560 - X562 have to be replaced by customer circuit.

  • Page 56: Figure 31: Analog Interface

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Test point strips X100 X101 DACOUT DACOUT Filter DACOUT_F X560 X561 X562 X551 X552 ADC1_IN ADC1_IN ADC2_IN ADC2_IN AGND AGND Figure 31: Analog interface Table 24: Pin assignment of the analog interface...

  • Page 57: Antenna Interface

    The RF signal of the GSM module is connected via the supplied RF adapter cable to the Hirose RF jack X505 located on the DSB75. Furthermore, in order to send or receive data, connect an external RF antenna to the SMA jack X506 which is internally connected to the Hirose RF connector X505.

  • Page 58: Power Supply Interfaces

    The constant voltage supply on the PCB provides all the supply voltages required for operating DSB75 and the GSM module. The power supply source can be a 9V…15V laboratory PSU or mains adapter and, in addition, an external battery used to feed only the GSM module.

  • Page 59: Figure 33: Location Of The Power Supply Connectors, Switches And Jumpers

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released X110 X401 X400 1 4 2 3 X120 S112 X121 S111 N400 C413 V 601 N410 V 602 X410 X405 V 600 N6 00 X411 C414 C415 X122 X602...

  • Page 60: Internal Supply Voltages

    Internal Supply Voltages This section describes the internal supply voltages generated by the power supply unit of DSB75. A simplified block diagram of the power supply concept is shown in section 3.14. Table 25: Description of power supply units Power Supply Unit...

  • Page 61: Figure 35: Schematic For Audio Supply (5V0_I)

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released AUDIO 100R 100R 5V0_I R751 R750 Figure 35: Schematic for audio supply (5V0_I) 3V3_4V5 VOUT LP3856-ADJ C412,414,415 R409 9410µF N410 X405 X410 X411 Figure 36: Schematic for GSM module supply (3V3_4V5 or BATT+)

  • Page 62: Power Supply For Dsb75 And Gsm Module

    If no battery is present and the GSM module is powered from the laboratory PSU be sure that the S601 toggle switch is in down position. The green LED (V431) on the DSB75 is driven by 3V0 voltage and indicates that the DSB75 is supplied with power and switched on. See also 4.3.

  • Page 63: Battery Powered Operation Of Gsm Module

    The battery charging current should be supplied from an external plug-in charger connected to the Lumberg connector X700 or X701 on the DSB75. Please note that the plug-in charger is not part of the delivery scope of the DSB75. It is available from Siemens (please ask your local Cinterion contact for support):...

  • Page 64: Charging Circuit

    3.14.3.2 Charging Circuit If a battery is used, it is possible to charge the battery by the charger circuitry on the DSB75. The charger circuitry provides trickle charge to the battery when the mobile is in deep discharge lockout or undervoltage lockout (when the battery condition is not suitable), and provides fast charging at normal charging conditions.

  • Page 65: Real Time Clock Supply

    3.14.4 Real Time Clock Supply A 100µF capacitor placed on the DSB75 is charged by the VDDLP line of the GSM module as long as the voltage BATT+ is applied. In case of power failure, the real time clock of the GSM module is supplied by the capacitor for approx.

  • Page 66: Adjusting The V Batt

    The maximum voltage is set only via the jumpers, it cannot be adjusted via the resistors. Figure 39 shows the location of the jumpers and variable resistors on the DSB75. The settings for adjusting the supply voltage of the GSM module are described in Table 31.

  • Page 67: Status Leds

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Status LEDs The DSB75 comprises several status LEDs. The position, the corresponding signal and the color of the LEDs can be seen in Figure 40. Figure 40: Location of LEDs...

  • Page 68: Indication Of Asynchronous Serial Interface Signals

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Indication of Asynchronous Serial Interface Signals All signals of the asynchronous interfaces ASC0, ASC1 and ASC2 are connected to buffers which drive 16 indicator LEDs. These buffers are enabled via the PWR_IND line which is activated by the module.

  • Page 69: Indication Of Power

    Indication of Power There are two power control LEDs on the DSB75. The green power control LED V431 is connected to the DSB75 supply voltage 3V0 which is always available when the DSB75 receives an input voltage. The yellow power control LED V430 is driven from the supply voltage VDD that is only active if a module is connected and turned on.

  • Page 70: Overview Of Switches And Jumpers

    Confidential / Released Overview of Switches and Jumpers This section provides an overview of all switches and jumpers located on DSB75. The exact location of each switch and jumper is shown in Figure 2 and Figure 43. Overview of Switches...
  • Page 71 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Reference Function Switch position 1 Switch position 3 S303 Using RXD1 line as ASC1-RXD Using RXD1 line as SD card data in (SPI mode) Connects B2B connector signal RXD1 to...
  • Page 72 ADC2_IN signal is open ADC2_IN signal is connected to the filtered DAC_OUT signal X554 Module boots from flash (normal operation) For Cinterion internal use only! Module boots from ROM based flash loader (necessary if flash is empty or corrupt) DSB75_hd_v12...
  • Page 73 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Reference Function Switch position 1 Switch position 3 S710 Disconnects a speaker connected to the Activates a speaker connected to the Lumberg connector X700 or X701 Lumberg connector X700 or X701 (audio...

  • Page 74: Figure 43: Location, Signal Names And Switch Positions Of The Slide Switches

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released from X111 S110 VUSB_IN from X110 5V; on EEPROM S500 I2CCLK 3V; on SPI1_CLK S502 EEPROM A0 from X110 S111 USB_DN from X111 S503 EEPROM A1 EEPROM A2 S504 5V;...

  • Page 75: Overview Of Jumpers

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Overview of Jumpers Table 33: Overview of jumpers Reference Function Jumper set Jumper not set X120 Voltage that is delivered by an USB Voltage that is delivered by an USB host is host connected to X110 can be used as disconnected to the module’s USB interface,...

  • Page 76: Figure 44: Location Of Jumpers

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 44: Location of jumpers X122 X203 Figure 45: Illustration of positions to cut the trace for jumpers X203 and X122 DSB75_hd_v12 Page 76 of 96 2008-08-26...

  • Page 77: Connecting Antenna And Gsm Module To Dsb75

    Connect the 80-pin board-to-board connector of the GSM module to the 80-pin board-to- board connector X100 of the DSB75. • Insert the M2 screws (1) from the bottom side into the small holes of the DSB75 (5). Push the self-gripping spacers (3) onto the screws as far as possible. •...

  • Page 78: Figure 47: Top View On Dsb75 With Connected Gsm Module (Mc75, Tc63 Or Tc65) And Rf

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 47: Top view on DSB75 with connected GSM module (MC75, TC63 or TC65) and RF cable DSB75_hd_v12 Page 78 of 96 2008-08-26...

  • Page 79: Turn On / Off The Gsm Module

    DTR line available on COM1. The high signal of DTR generates a low pulse on IGT which switches the module on. For this purpose, the DSB75 uses a differentiator circuit comprising the RC combination C420, R420, R421 and the transistor V420.

  • Page 80: Turn Off The Gsm Module

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Turn off the GSM Module Normal Power-off The best and safest approach to switch off the module is using the AT command AT^SMSO. This procedure lets the GSM module log off from the network and safe data before it shuts down.

  • Page 81: Technical Data Of Dsb75

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Technical Data of DSB75 Table 34: DSB75 maximum ratings Parameter Condition Min. Max. Unit Supply voltage Laboratory PSU Operating temperature °C Storage temperature °C Table 35: DSB75 technical data...
  • Page 82 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Parameters Condition Min. Typical Max. Unit Charging interface Charger voltage 4.75 Fast charging current (Jumper X600 not set) Fast charging current 1000 1050 (Jumper X600 set) Trickle charge current...
  • Page 83 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Parameters Condition Min. Typical Max. Unit Audio interface 1 Differential output voltage at full scale sine (balanced input) 1kHz Handset Mode Differential input (AT^SNFS=1) voltage for 0dBm0 (after settling)

  • Page 84: Cable Requirements

    1990MHz (2170MHz), its coverage also includes the 850MHz frequency band, sufficient ground plane and mounting provided. Cable Requirements The DSB75 has been tested and approved for use with a maximum cable length of 3m for following interfaces: - USB interface (shielded)

  • Page 85: Appendix

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Appendix List of Parts and Accessories Table 36: List of parts and accessories Description Supplier Ordering information DSB75 Support Board Cinterion Ordering number: L36880-N8811-A100 Votronic Handset VOTRONIC Votronic HH-SI-30.3/V1.1/0 VOTRONIC Entwicklungs- und Produktionsgesellschaft für...

  • Page 86: Circuit Diagrams Of Dsb75

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Circuit Diagrams of DSB75 Figure 49: Schematic of page signals DSB75_hd_v12 Page 86 of 96 2008-08-26...

  • Page 87: Figure 50: Schematic Of Position List

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 50: Schematic of position list DSB75_hd_v12 Page 87 of 96 2008-08-26...

  • Page 88: Figure 51: Schematic Sheet 1 - B2B Connector, Test Points, Usb Interface

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 51: Schematic sheet 1 – B2B connector, test points, USB interface DSB75_hd_v12 Page 88 of 96 2008-08-26...

  • Page 89: Figure 52: Schematic Sheet 2 - Asc0, Asc1 And Asc2 Interface

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 52: Schematic sheet 2 – ASC0, ASC1 and ASC2 interface DSB75_hd_v12 Page 89 of 96 2008-08-26...

  • Page 90: Figure 53: Schematic Sheet 3 - Sd Card Reader

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 53: Schematic sheet 3 – SD card reader DSB75_hd_v12 Page 90 of 96 2008-08-26...

  • Page 91: Figure 54: Schematic Sheet 4 - Gpios, Power Supply

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 54: Schematic sheet 4 – GPIOs, power supply DSB75_hd_v12 Page 91 of 96 2008-08-26...
  • Page 92 DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released DSB75_hd_v12 Page 92 of 96 2008-08-26...

  • Page 93: Figure 55: Schematic Sheet 5 - Sim Card, I2C, Spi, Analog And Antenna Interface

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 55: Schematic sheet 5 – SIM card, I2C, SPI, analog and antenna interface CHARGE LP2985IM5X-5.0 POWER VOUT VCHARGE V600 N600 ISENSE VSENSE V603 CRS04 R601 V602 0R15 0R15...

  • Page 94: Figure 57: Schematic Sheet 7 - Audio Interface

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Figure 57: Schematic sheet 7 – audio interface DSB75_hd_v12 Page 94 of 96 2008-08-26...

  • Page 95: Floor Plan Of The Dsb75

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released Floor Plan of the DSB75 X201 X205 X202 X110 R205 R206 R208 R209 R201 R202 R203 R250 R210 R211 R204 R207 L115 X401 X400 L111 L114 L116 L201 L203...

  • Page 96: Figure 59: Floor Plan Bottom Side

    DSB75 Development Support Board Rev. B1 Hardware Description Confidential / Released X111 TP104 X301 X701 Figure 59: Floor plan bottom side DSB75_hd_v12 Page 96 of 96 2008-08-26...

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