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HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide Contents
Issue 01 (2010-12-31)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Contents
1 Introduction......................................................................................................................................1
1.1 Overview ........................................................................................................................................ 1
2 Overall Description..........................................................................................................................2
2.1 About This Chapter....................................................................................................................... 2
2.2 Function Overview........................................................................................................................ 2
2.3 Circuit Block Diagram................................................................................................................... 3
2.4 Application Block Diagram........................................................................................................... 4
3 Description of the Application Interfaces ......................................................................................5
3.1 About This Chapter....................................................................................................................... 5
3.2 Mini PCI Express Interface.......................................................................................................... 5
3.3 Power Sources and Grounds...................................................................................................... 8
3.4 Power Supply Time Sequence.................................................................................................... 8
3.5 USB Signals................................................................................................................................... 9
3.6 USIM Signals............................................................................................................................... 10
3.6.1 USIM Interface Schematic Reference ............................................................................ 10
3.6.2 Design Guide.......................................................................................................................11
3.6.3 Certification Test ................................................................................................................ 13
3.7 W_DISABLE# Signal.................................................................................................................. 14
3.8 LED_WWAN# Signal.................................................................................................................. 14
3.9 WAKE_NB_N Signal .................................................................................................................. 16
3.10 NC Pins...................................................................................................................................... 16
4 RF Specifications............................................................................................................................17
4.1 Operating Frequencies .............................................................................................................. 17
4.2 Conducted RF Measurement.................................................................................................... 17
4.2.1 Test Environment ............................................................................................................... 17
4.2.2 Test Standards.................................................................................................................... 18
4.3 Conducted Rx Sensitivity and Tx Power................................................................................. 18
4.3.1 Conducted Receive Sensitivity........................................................................................ 18
4.3.2 Conducted Transmit Power.............................................................................................. 19
4.4 Antenna Design Requirements................................................................................................. 20