Huawei EM820W 11LEDWWAN signal, Pins Name Description Additional Direction to Module, Ledwwan

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HUAWEI EM820W HSPA+ PC Embedded Module

 

 

 

 

Hardware Guide

 

 

Description of the Application Interfaces

 

Table 3-11LED_WWAN signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pins

Name

 

Description

 

 

Additional

Direction to

 

 

 

 

 

 

 

Description

Module

 

42

LED_WWAN

 

Active-low LED signal

 

 

L: Light on

Output

 

 

 

 

indicating the status of

 

 

H: Light off

 

 

 

 

 

the module.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This signal is used to display the state of WWAN. The reference circuit diagram is shown in the following figure.

Figure 3-4LED_WWAN# signal reference circuit diagram

Normally, when the HUAWEI module is enabled, the LED is on, and when disabled, the LED is off. The wink mode of the LED can be customized according to the requirement of the client.

For resistance of R placed on PC, choose the value that satisfies the following equation:

IF*R+VF+IF*100 =VCC

VF: Forward Voltage

IF: Forward current

Take the LED 19-213/GVC-AMNB/3T as an example (its manufacturer is Everlight Electronics., Ltd. and the website is http://www.everlight.com). Figure 3-5 shows its IF-VFcurves. If VCC is 3.3 V and the desired current through the LED IF is 3 mA, then the voltage of the LED VF is 1.5 V. According to IF-VFcurves, the corresponding value for resistance of R is (3.3 - 0.003 x 100 - 1.5) / 0.003 = 500 Ω.

The brightness of the LED depends on the current value, and for most of the indicator lights the current between 2 mA to 5 mA is adequate.

Issue 01 (2010-12-31)

Huawei Proprietary and Confidential

15

Copyright © Huawei Technologies Co., Ltd.

 

 

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Contents Issue Date Hardware GuideNo Warranty History About This DocumentVersion Date Chapter Descriptions Contents Electrical and Reliability Features Recommendations for Designing the Module AntennasTables Figures Introduction OverviewAbout This Chapter Feature DescriptionOverall Description Function OverviewCircuit Block Diagram SMSApplication Block Diagram 1Circuit block diagram of the EM820W moduleDescription of the Application Interfaces Mini PCI Express InterfaceVCC3V3 UimresetWDISABLE# Wdisablen COEX1Active-low LED signal Output Indicating the state Card USB signal D Input/outputUSB signal D+ Input/output Mini Card ground Not connectedName Pins Minimum Type Maximum Power Sources and GroundsPower Supply Time Sequence VCCTimeNominal value Unit USB SignalsParameter Remarks Name Pin Description Direction to ModulePin Name Description Usim SignalsUsim Interface Schematic Reference UIM/SIMDesign Guide 7Vcc SIM CLK requirements Minimum Maximum2Vcc 7VccVcc Certification Test8SIM IO requirements Vcc Vcc+0.3Pins Name Description Direction to Module WDISABLE# SignalLEDWWAN# Signal SW Control Setting Radio OperationLedwwan 11LEDWWAN signalPins Name Description Additional Direction to Module IF*R+VF+IF*100 =VCCNC Pins Wakenbn SignalNC pins are not internally connected in the EM820W Conducted RF Measurement RF SpecificationsOperating Frequencies Test EnvironmentConducted Receive Sensitivity Conducted Rx Sensitivity and Tx PowerTest Standards EM820W Test Value dBmConducted Transmit Power 3GPP Protocol EM820W Test Value dBm Claim dBm Min Type MaxAntenna Design Indicators Antenna Design RequirementsDCS UMTS850UMTS900 PCSEnvelope Correlation Coefficient 3 GSM/WCDMA Antenna Requirements InterferenceGSM/WCDMA Antenna Requirements Radio Test Environment Passive TestsDesign Recommendations Recommendations for Designing the Module AntennasESD Protection for the Antenna Interface Issue 01 Huawei Proprietary and Confidential Working and Storage Temperatures and Humidity Electrical and Reliability FeaturesExtreme Working Conditions Electrical Criteria of Application Interfaces Specification Minimum Value Maximum Value UnitParameter Description Minimum Value Power Consumption Power Supply FeaturesPower Supply Power Voltage Tolerance Peak Maximum Normal MaximumHsupa ConfigurationHsdpa Description Test Value UnitsEDGE850 225 Up/1 DownGPRS900 250 Up/1 Down 351 488 165 217 293Scenario Idle Suspend Unit Offline Enabled Disabled Reliability FeaturesTest Condition Standard Test Condition Standard EMC and ESD Features Dimensions of the Mini PCI Express Connector Mechanical SpecificationsDimensions and Interfaces Dimensions and Interfaces of EM820WSpecification Selection for Fasteners Installing the EM820W on the Main Board of PCIssue 01 Huawei Proprietary and Confidential Romoving the EM820W from the Main Board of PC Appendix a Circuits of Typical Interfaces 1Circuits of typical interfaces in the EM820W moduleAppendix B Acronyms and Abbreviations Acronym or Abbreviation ExpansionPCB NTCPbcch PDU

EM820W specifications

The Huawei EM820W is a cutting-edge mobile broadband device that exemplifies Huawei's commitment to innovation and excellence in the telecommunications sector. Designed for seamless connectivity, the EM820W caters primarily to users who demand high-speed data access while on the move.

One of the standout features of the Huawei EM820W is its support for high-speed 4G LTE connectivity. With download speeds that can reach up to 150 Mbps and upload speeds of up to 50 Mbps, users can enjoy smooth streaming, rapid downloads, and responsive online gaming experiences. This capability makes the device an ideal choice for both individual users and business professionals who rely on robust internet access.

The EM820W is equipped with a compact and lightweight design, making it highly portable. This device can be easily carried in a pocket or bag, allowing users to stay connected wherever they go. Its plug-and-play feature simplifies the setup process, ensuring that even those who are not tech-savvy can easily get online.

Another notable aspect of the Huawei EM820W is its compatibility with a wide range of operating systems, including Windows, macOS, and various distributions of Linux. This versatility means that users can connect the device to their preferred platforms without facing compatibility issues, enhancing the overall user experience.

The device also incorporates advanced security features to safeguard user data, including built-in encryption protocols. This is particularly important for business users who require secure connections for sensitive transactions and communications.

In addition to its connectivity capabilities, the EM820W showcases energy-efficient technologies that optimize battery performance. The device is designed to consume minimal power, allowing users to prolong usage times without frequently recharging.

The Huawei EM820W comes with a user-friendly interface, enabling users to easily manage their connections and monitor data usage. This feature is valuable for those who need to track their internet consumption to avoid exceeding data limits imposed by service providers.

With its blend of speed, portability, and user-oriented features, the Huawei EM820W stands out as a reliable solution for those seeking robust mobile broadband capabilities. Whether for personal use or professional needs, this device ensures that users remain connected in an increasingly digital world.
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