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Huawei MS2131 Hardware Design Manual

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MS2131
Hardware Design Guide
Issue
02
Date
2017-1-13

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Summary of Contents for Huawei MS2131

  • Page 1 MS2131 Hardware Design Guide Issue Date 2017-1-13...
  • Page 2 Thus, the descriptions herein may not exactly match the product or its accessories which you purchase. Huawei reserves the right to change or modify any information or specifications contained in this manual without prior notice and without any liability.
  • Page 3 PURPOSE, ARE MADE IN RELATION TO THE ACCURACY, RELIABILITY OR CONTENTS OF THIS MANUAL. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL HUAWEI BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, OR LOSS OF PROFITS, BUSINESS, REVENUE, DATA, GOODWILL SAVINGS OR ANTICIPATED SAVINGS REGARDLESS OF WHETHER SUCH LOSSES ARE FORSEEABLE OR NOT.
  • Page 4 MS2131 Hardware Design Guide About This Document About This Document Change History Issue Date Chapter Note V1.0 2014-9-20 Initial Release V1.1 2017-1-13 6.3.2 Modify Peripheral Staking Requirements Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.

  • Page 5: Table Of Contents

    6 MS2131 Structure Features and Design Requirements ............ 21 6.1 About This Chapter ................................21 6.2 Dimensions and Weight ..............................21 6.3 MS2131 Design Requirements Addressing the Host Structure ..................22 6.3.1 USB Connector Outline Dimensions..........................22 6.3.2 MS2131 Peripheral Staking Requirements ........................24 7 MS2131 Power Design Guide .....................
  • Page 6 10.4.2 Working Current ................................36 10.5 Reliability Features ................................36 11 Appendix ..........................40 11.1 Appendix One MS2131 Power Consumption Data in Different Scenarios ..............40 11.2 Appendix Two MS2131 OTA Data ..........................42 11.3 Appendix Three MS2131 Thermal Test........................... 44...

  • Page 7: Introduction

    Introduction This document describes the MS2131's hardware specifications, port design requirements, design guide, and working principles. The next five chapters describe the MS2131's specifications and design requirements of its host. Chapter 6 to Chapter 9 provide details of the MS2131'S working principles and design guides. Chapter 10 introduces the MS2131's electrical features and reliability.

  • Page 8: Precautions

    Hardware Design Guide Precautions Precautions This chapter describes the precautions for using the MS2131, especially for the user device or host design. If not properly used, the MS2131 may not function normally and require design changes on the host. The MS2131 has strict peripheral power supply requirement. Strictly follow the design requirements in Chapter 7 when designing the power supply circuits.

  • Page 9: Ms2131 Overall Description

    WCDMA/GSM short message service (SMS)  The MS2131 can be connected to a host over a USB port to implement data card functions. In the coverage area of the HSPA+/UMTS or EDGE/GPRS/GSM network, you can access wireless networks, use SMS for communication, send and receive emails, and more.

  • Page 10: Function Overview

    Physical features Dimensions: 85 mm x 27 mm x 12.3 mm (33.5 in x 10.6 in x 4.8 in) Weight: about 22 g Certification CE, FCC, and GCF Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.

  • Page 11: Circuit Diagram

    MS2131 Hardware Design Guide MS2131 Overall Description 3.4 Circuit Diagram The MS2131 contains the following functional modules, as shown in Figure 3-1. Baseband processor (BB) and RF processor (RTR)  Nand flash  19.2 MHz crystal resonator  RF circuit ...

  • Page 12: Port Application Diagram

    MS2131 Hardware Design Guide MS2131 Overall Description 3.5 Port Application Diagram The MS2131 contains the following ports, as shown in Figure 3-2. USB2.0 port  SIM card slot (1.8 V or 3.0 V)  TS-5 external antenna port  Figure 3-2 MS2131 application diagram...

  • Page 13: Ms2131 Interface Features And Design Requirements

    4.2 MS2131 Interface Introduction 4.2.1 USB Port and Reference Circuits The MS2131 communicates with the host over the USB port, which supports the USB2.0 protocol. The MS2131 has the USB signals adjusted and provides build-out circuits. The host must be able to perform impedance matching and protection. Figure 4-1 shows the reference circuits.

  • Page 14: Power Port Introduction

    300 μF and a decoupling capacitor of 0.1 μF must be paralleled at the power port of the host. When the MS2131 works in GSM mode, its peak current can reach 2 A. To prevent the MS2131's voltage from dropping to lower than 3.5 V and help ensure the MS2131 function properly, place a large-capacity capacitor (at least 300 μF) near the USB port.

  • Page 15: Sim Card Port Introduction

    (LDO) is used for the power supply, the transient current capacity must be considered. 4.3 SIM Card Port Introduction A standard SIM card port is embedded in the MS2131. The port supports the 3.0 V and 1.8 V SIM cards. No external design is required. Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright ©...

  • Page 16: Ms2131 Rf Features And Design Requirements

    MS2131 RF features. As the design of the host imposes a great impact on the MS2131's wireless performance, this chapter provides detailed requirements for the host layout and stacking design. The antenna test environment is also introduced to help you understand the wireless performance test methods for the MS2131.

  • Page 17: Wireless Performance Specifications

    –100 –100 –98.5 (dBm) The preceding design specifications can be realized only when the MS2131 is in optimal layout with comprehensive shielding measures. Strictly follow the antenna design and stacking requirements to help realize the optimal MS2131 performance. 5.3.2 TRP Total Radiated Power (TRP) is an important transmission performance specification of the MS2131.
  • Page 18 It do not place any metal components around the antenna. Reference Figure 5-3. Follow the preceding requirements to ensure the optimal MS2131 performance. If any discrepancy exists, the MS2131 may fail to connect to the network or provide data, voice, or SMS services.
  • Page 19 MS2131 Hardware Design Guide MS2131 RF Features and Design Requirements Figure 5-2 Recommended peripheral layout for the MS2131 ① ② ⑤ ③ ④ Figure 5-3 Two common PCB layouts Layout 1: The USB dongle is embedded in the longer edge of the PCB.

  • Page 20: Antenna Test Environment

    Strictly follow the antenna layout requirements and the stacking requirements specified in section 6.3.2 "MS2131 Peripheral Staking Requirements" when designing the system. If you fail to follow the requirements, the TRP and TIS specifications of the MS2131 will deteriorate, and exceptions, such as network access failures and call failures, will occur.
  • Page 21 Auxiliary dedicated test platform: − Design the MS2131 dedicated test platform based on the stacking layout in Figure 5-2. Figure 5-6 shows the platform where a Thinkpad T61 is used. This dedicated platform simulates the actual system layout to the maximum extent and all the tests and commissioning on the MS2131 are performed in the platform.

  • Page 22: Ms2131 Structure Features And Design Requirements

    6.2 Dimensions and Weight The MS2131 has dimensions of 84.9 mm x 27 mm x 12.3 mm (including the USB cap) and weighs about 30.0 g. Figure 6-1 shows the outline dimensions of the MS2131.

  • Page 23: Ms2131 Design Requirements Addressing The Host Structure

    Structure 6.3.1 USB Connector Outline Dimensions A standard USB2.0 connector, shown in Figure 6-2, is used for the MS2131. The thickness of the PCB where the connector is inserted must range from 0.6 mm to 1.0 mm. The recommended thickness is 0.8 mm.
  • Page 24 MS2131 Hardware Design Guide MS2131 Structure Features and Design Requirements Figure 6-3 Dimensions of the USB connector Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.

  • Page 25: Ms2131 Peripheral Staking Requirements

    VBUS line must be routed at inner layer and packaged with the ground. · It recommended that the LC parallel resonant network should be reserved at the D+/D- digital line of the USB interface which is between other device and MS2131 to reduce the influence of harmonics on low frequency. ·...
  • Page 26 MS2131. We have given some design rules above for customers to solve the strong interference. If the customers are unable to meet the design rules, it may decrease the MS2131 performance even the MS2131 cannot work normally.

  • Page 27: Ms2131 Power Design Guide

    Power Design Requirements." 7.2 MS2131 Power Supply The working power of the MS2131 is provided through the USB port with an input voltage ranging from 4.75 V to 5.25 V (typical value: 5 V). 7.3 MS2131 Power Requirements in 2G Mode This section describes the MS2131 power features when in use in 2G mode.
  • Page 28 577uS x 8 slot 4.61ms 4.61ms 4.61ms In GSM mode, the MS2131 power transmission occurs in cycles and has transient changes during each transmission, as shown in Figure 7-3. Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.

  • Page 29: Ms2131 Power Requirements In 3G Mode

    Seen from Figure 7-3, the GMS power amplifier (PA) performs the transmission in the transmission slots. In case of poor signal reception, the PA transmission power may reach 33 dBm. The transient MS2131 power supply current may reach 2 A and a voltage drop then occurs.

  • Page 30: Ms2131 Power Consumption Features

    Power consumption in standby mode with a 3G network connected: 5 V and less than 100 mA 7.6 Peripheral Power Design Requirements Power supplied to the MS2131 must have a minimum general current of 800 mA and a minimum transient current of 2 A. The peripheral power design must be dedicated to these requirements, to help the MS2131 bear the power supply voltage drop for transmission in GSM mode.

  • Page 31: Derating Requirements

    Overvoltage and anti-reversion diodes must be connected to external power supply connectors to protect the power circuits when exceptions occur. If the host supplies power to the MS2131 over a DC/DC converter, the converter must be able to bear the 2 A transient current.

  • Page 32: Ms2131 Pcb Design Guide

    Do not interrupt the signal with strong interference or sensitive signals. 8.2 Power Design The power design is a key factor for the MS2131 performance, which has impacts on the following specifications: EMC performance ...

  • Page 33: Cable Routing Rules

    The power consumption of the MS2131 varies by network standard. Working in GSM mode, the MS2131 has a peak current of larger than 2 A. To ensure a sufficient power capacity and minimize the voltage drop caused by cable routing, a 100-mil cable routing width is recommended and the finish copper thickness is 1 OZ.

  • Page 34: Grounding Measure

    Ensure the continuity of reference grounds for all signal cables to avoid cross division.  Ensure a minimum loop path for each signal cable. Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.

  • Page 35: Ms2131 Esd Design Guide

    When connecting the host to the MS2131, ensure the grounding reliability. Use TVSs at the joint between the MS2131 and the host. The TVS on the male connector must have a parasitic capacitance less than 1 pF while the TVS on the power supply must have a peak power larger than 100 W at 8/20 μs...

  • Page 36: Ms2131 Electrical And Reliability Features

    ESD features  10.2 Ultra Working Conditions WARNING Table 10-1 lists the working condition limitation for the MS2131. Permanent damage may be caused to the MS2131 if used beyond the conditions. Table 10-1 Ultra working conditions of the MS2131 Symbol...

  • Page 37: Working And Storage Environment

    (0 Hz to 2.5 GHz) 10.4.2 Working Current The MS2131 working current is specified in section 11.1 "Appendix One MS2131 Power Consumption Data in Different Scenarios", obtained from a test using direct current and having a typical power supply of 5 V.
  • Page 38 MS2131 Hardware Design Guide MS2131 Electrical and Reliability Features Test Test Item Test Parameter Result Weight bearing test PASS 70 kgf for 2s on the front and rear surfaces Pressing test PASS 120 N for the surfaces Bending test PASS...
  • Page 39 MS2131 Hardware Design Guide MS2131 Electrical and Reliability Features Test Test Item Test Parameter Result Use two chambers. Keep the temperature at –40°C for one hour and then 70°C for another Temperature shock PASS hour at a maximum interval of 20 seconds.
  • Page 40 The MS2131 has dedicated ESD requirements. To ensure the proper connection between the MS2131 and the user interface board reference ground, it is recommended that copper studs or other low-impedance metal fasteners be used for the copper exposure (to connect to an interface reference ground) of the positioning holes on the user interface board.

  • Page 41: Appendix

    MS2131 Hardware Design Guide Appendix Appendix 11.1 Appendix One MS2131 Power Consumption Data in Different Scenarios Table 11-1 MS2131 working current (5 V) in common scenarios Description Bands Current Units Notes/Configuration HSDPA/WCDMA UMTS Power up and idle (DRX cycle = 8 bands [2.56 sec])
  • Page 42 Band VIII(W900) HSDPA Band I(W2100) Band II (W2100) Band V(W850) Band VIII(W900) Values in Table 11-3 are average values obtained from a certain number of test samples. Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.

  • Page 43: Appendix Two Ms2131 Ota Data

    Figure 5-2. The tests are implemented with a PC. If the stacking fails to meet requirements made in section 5.4 "Antenna Design Requirements", the MS2131 performance may worsen compared with data in Table 11-4.
  • Page 44 The preceding values are average values obtained from a certain number of test samples. Figure 5-2 shows the MS2131 deployed in a PCB. Samples are tested deployed in the board. If the PCB is not designed as required in section 5.4 "Antenna Design Requirements", the MS2131 performance may worsen compared with data in Table 11-4.

  • Page 45: Appendix Three Ms2131 Thermal Test

    MS2131 Hardware Design Guide Appendix 11.3 Appendix Three MS2131 Thermal Test Thermal Test Report of Huawei M Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.
  • Page 46 Global Positioning System Global System of Mobile communication HSDPA High Speed Downlink Packet Access Not connected Pulse-code modulation Universal Serial BUS WCDMA Wideband CODE division multiple access Huawei Proprietary and Confidential Issue 02 (2017-1-13) Copyright © Huawei Technologies Co., Ltd.

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