Справочник ПользователяСодержаниеContents3Tables6Figures71 Introduction91.1 Key Features at a Glance91.2 ELS31-VA/ELS51-VA System Overview121.3 Circuit Concept132 Interface Characteristics142.1 Application Interface142.1.1 Pad Assignment142.1.2 Signal Properties162.1.2.1 Absolute Maximum Ratings212.1.3 USB Interface222.1.3.1 Interface implementation232.1.3.2 Reducing Power Consumption242.1.4 Serial Interface ASC0252.1.4.1 Serial Interface Start-up Behavior262.1.5 Serial Interface ASC1272.1.6 UICC/SIM/USIM Interface292.1.7 Digital Audio Interface312.1.8 Pulse Code Modulation Interface (PCM)312.1.9 Inter IC Sound Interface (I2S)332.1.10 GPIO Interface342.1.11 I2C Interface362.1.12 SPI Interface382.1.13 Pulse Counter392.1.14 HSIC Interface (ELS51-VA Only)392.1.15 SDIO Interface (ELS51-VA Only)392.1.16 Control Signals422.1.16.1 Status LED422.1.16.2 Power Indication Circuit432.1.16.3 Host Wakeup432.1.16.4 Fast Shutdown452.2 RF Antenna Interface462.2.1 Antenna Interface Specifications462.2.2 Antenna Installation472.2.3 RF Line Routing Design482.2.3.1 RF Interface Signals Circuit Diagram Example482.2.3.2 Line Arrangement Examples492.3 Sample Application542.3.1 Prevent Back Powering562.3.2 Sample Level Conversion Circuit563 Operating Characteristics573.1 Operating Modes573.2 Power Up/Power Down Scenarios583.2.1 Turn on ELS31-VA/ELS51-VA583.2.1.1 Connecting ELS31-VA/ELS51-VA BATT Lines583.2.1.2 Switch on ELS31-VA/ELS51-VA Using ON Signal593.2.2 Restart ELS31-VA/ELS51-VA603.2.2.1 Restart ELS31-VA/ELS51-VA via AT+CFUN Command603.2.2.2 Restart ELS31-VA/ELS51-VA Using EMERG_RST603.2.3 Signal States after First Startup623.2.4 Turn off ELS31-VA/ELS51-VA633.2.4.1 Switch off ELS31-VA/ELS51-VA Using AT Command633.2.5 Automatic Shutdown643.2.5.1 Thermal Shutdown643.2.5.2 Undervoltage Shutdown653.2.5.3 Overvoltage Shutdown653.3 Power Saving663.3.1 Power Saving while Attached to LTE Networks663.3.2 Wake-up via RTS0/RTS1673.4 Power Supply683.4.1 Power Supply Ratings693.4.2 Minimizing Power Losses703.4.3 Measuring the Supply Voltage (BATT_BB)703.4.4 Monitoring Power Supply by AT Command703.5 Operating Temperatures713.6 Electrostatic Discharge723.6.1 ESD Protection for Antenna Interface723.7 Blocking against RF on Interface Lines733.8 Reliability Characteristics764 Mechanical Dimensions, Mounting and Packaging774.1 Mechanical Dimensions of ELS31-VA/ELS51-VA774.2 Mounting ELS31-VA/ELS51-VA onto the Application Platform794.2.1 SMT PCB Assembly794.2.1.1 Land Pattern and Stencil794.2.1.2 Board Level Characterization814.2.2 Moisture Sensitivity Level814.2.3 Soldering Conditions and Temperature824.2.3.1 Reflow Profile824.2.3.2 Maximum Temperature and Duration834.2.4 Durability and Mechanical Handling844.2.4.1 Storage Conditions844.2.4.2 Processing Life854.2.4.3 Baking854.2.4.4 Electrostatic Discharge854.3 Packaging864.3.1 Tape and Reel864.3.1.1 Orientation864.3.1.2 Barcode Label874.3.2 Shipping Materials884.3.2.1 Moisture Barrier Bag884.3.2.2 Transportation Box904.3.3 Trays915 Regulatory and Type Approval Information935.1 Directives and Standards935.2 SAR requirements specific to portable mobiles955.3 Reference Equipment for Type Approval965.4 Compliance with FCC and IC Rules and Regulations976 Document Information996.1 Revision History996.2 Related Documents1006.3 Terms and Abbreviations1006.4 Safety Precaution Notes1037 Appendix1047.1 List of Parts and Accessories104Размер: 2,0 МБСтраницы: 106Язык: EnglishПросмотреть