Huawei EM820W manual Certification Test, 8SIM IO requirements, Vcc Vcc+0.3, ESD protection

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HUAWEI EM820W HSPA+ PC Embedded Module

 

 

Hardware Guide

 

Description of the Application Interfaces

 

Table 3-8SIM IO requirements

 

 

 

 

 

 

 

 

IO

Minimum

 

Maximum

 

 

 

 

 

 

VIL

0

 

0.4

 

 

 

 

 

 

VIH

0.7Vcc

 

Vcc

 

 

 

 

 

 

VOL

–0.3

 

0.2 Vcc

 

 

 

 

 

 

VOH

0.7 Vcc

 

Vcc+0.3

 

 

 

 

 

The VOLmax of 0.45 V for the output is specified at an output current of 3 mA whereas the

VILmax of 0.4 V for the SIM IO input is specified at an input current of 1 mA. With the smaller current drive, the output voltage would be driven lower than the stated maximum value.

zESD protection

Since the SIM is a CMOS device, ESD protection devices should be placed near the SIM connector to provide protection before connecting to the module. In addition, all the SIM interface signals should be bypassed with a 10 pF capacitor.

The used ESD device (PESD3V3L5UY, NXP) in Figure 3-2 is a low capacitance 5-fold ESD protection diode arrays in SOT363 package.

zClock frequency

The SIM must support clock frequencies between 1 MHz and 4 MHz. (The Mini Card can be programmed to generate a clock of 1.625 MHz, 2.6 MHz, or 3.25 MHz.)

zRouting recommendations

The SIM interface signals consist of four signals that are UIM_PWR, UIM_RST, UIM_CLK, and UIM_DATA (UIM_Vpp is neither connected nor used in many applications). Due to the relatively low clock frequencies involved, the concern is not the degradation of the SIM signals but that of routing of the SIM interface signals through areas considered to be of high risk for RF noise coupling (crosstalk and RF contamination), which can desensitize the radio circuitry. The general guidelines that should be followed are listed as follows:

−It is recommended that these signals should be routed over a continuous ground plane.

−SIM interface signals should not be routed near high transient signals (power supply chokes and DC/DC switching FETs).

−Prevent routing of these signals near output connectors.

−Keep SIM interface signals isolated from other signals. 2x width spacing (1.5x min) between SIM interface signals and all other signal routing is recommended.

3.6.3Certification Test

Using test equipment simulates a (U)SIM card to test U(SIM) protocol in GCF or PTCRB test, If some test. If you encounter some issues during SIM/USIM test, please contact Huawei for more details.

Issue 01 (2010-12-31)

Huawei Proprietary and Confidential

13

Copyright © Huawei Technologies Co., Ltd.

 

 

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Contents Issue Date Hardware GuideNo Warranty Version Date Chapter Descriptions About This DocumentHistory Contents Electrical and Reliability Features Recommendations for Designing the Module AntennasTables Figures Introduction OverviewFeature Description Overall DescriptionAbout This Chapter Function OverviewCircuit Block Diagram SMSApplication Block Diagram 1Circuit block diagram of the EM820W moduleDescription of the Application Interfaces Mini PCI Express InterfaceUimreset WDISABLE# WdisablenVCC3V3 COEX1USB signal D Input/output USB signal D+ Input/outputActive-low LED signal Output Indicating the state Card Mini Card ground Not connectedPower Sources and Grounds Power Supply Time SequenceName Pins Minimum Type Maximum VCCUSB Signals Parameter RemarksTimeNominal value Unit Name Pin Description Direction to ModuleUsim Signals Usim Interface Schematic ReferencePin Name Description UIM/SIMDesign Guide Minimum Maximum 2Vcc7Vcc SIM CLK requirements 7VccCertification Test 8SIM IO requirementsVcc Vcc Vcc+0.3WDISABLE# Signal LEDWWAN# SignalPins Name Description Direction to Module SW Control Setting Radio Operation11LEDWWAN signal Pins Name Description Additional Direction to ModuleLedwwan IF*R+VF+IF*100 =VCCNC pins are not internally connected in the EM820W Wakenbn SignalNC Pins RF Specifications Operating FrequenciesConducted RF Measurement Test EnvironmentConducted Rx Sensitivity and Tx Power Test StandardsConducted Receive Sensitivity EM820W Test Value dBmConducted Transmit Power 3GPP Protocol EM820W Test Value dBm Claim dBm Min Type MaxAntenna Design Indicators Antenna Design RequirementsUMTS850 UMTS900DCS PCSEnvelope Correlation Coefficient GSM/WCDMA Antenna Requirements Interference3 GSM/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 Extreme Working Conditions Electrical and Reliability FeaturesWorking and Storage Temperatures and Humidity Parameter Description Minimum Value Specification Minimum Value Maximum Value UnitElectrical Criteria of Application Interfaces Power Supply Features Power SupplyPower Consumption Power Voltage Tolerance Peak Maximum Normal MaximumConfiguration HsdpaHsupa Description Test Value Units225 Up/1 Down GPRS900EDGE850 250 Up/1 Down 351 488 165 217 293Test Condition Standard Reliability FeaturesScenario Idle Suspend Unit Offline Enabled Disabled Test Condition Standard EMC and ESD Features Mechanical Specifications Dimensions and InterfacesDimensions of the Mini PCI Express Connector 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 ExpansionNTC PbcchPCB 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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