사용자 설명서차례Contents3Tables6Figures71 Introduction91.1 Key Features at a Glance91.2 ELS81-US System Overview121.3 Circuit Concept132 Interface Characteristics152.1 Application Interface152.1.1 Pad Assignment152.1.2 Signal Properties172.1.2.1 Absolute Maximum Ratings232.1.3 USB Interface242.1.3.1 Reducing Power Consumption252.1.4 Serial Interface ASC0262.1.5 Serial Interface ASC1282.1.6 UICC/SIM/USIM Interface302.1.6.1 Enhanced ESD Protection for SIM Interface322.1.7 RTC Backup332.1.8 GPIO Interface342.1.9 I2C Interface362.1.10 SPI Interface382.1.11 PWM Interfaces392.1.12 Pulse Counter392.1.13 Control Signals392.1.13.1 Status LED392.1.13.2 Power Indication Circuit402.1.13.3 Host Wakeup402.1.13.4 Fast Shutdown412.2 RF Antenna Interface422.2.1 Antenna Interface Specifications422.2.2 Antenna Installation442.2.3 RF Line Routing Design452.2.3.1 Line Arrangement Examples452.2.3.2 Routing Example502.3 Sample Application512.3.1 Sample Level Conversion Circuit533 Operating Characteristics543.1 Operating Modes543.2 Power Up/Power Down Scenarios553.2.1 Turn on ELS81-US553.2.1.1 Connecting ELS81-US BATT+ Lines553.2.1.2 Switch on ELS81-US Using ON Signal573.2.1.3 Automatic Power On583.2.2 Restart ELS81-US593.2.2.1 Restart ELS81-US via AT+CFUN Command593.2.2.2 Restart ELS81-US Using EMERG_RST603.2.3 Signal States after Startup613.2.4 Turn off ELS81-US623.2.4.1 Switch off ELS81-US Using AT Command623.2.5 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 WCDMA Networks663.3.2 Power Saving while Attached to LTE Networks673.3.3 Wake-up via RTS0683.4 Power Supply693.4.1 Power Supply Ratings693.4.2 Measuring the Supply Voltage (VBATT+)723.4.3 Monitoring Power Supply by AT Command723.5 Operating Temperatures733.6 Electrostatic Discharge743.6.1 ESD Protection for Antenna Interfaces743.7 Blocking against RF on Interface Lines753.8 Reliability Characteristics774 Mechanical Dimensions, Mounting and Packaging784.1 Mechanical Dimensions of ELS81-US784.2 Mounting ELS81-US onto the Application Platform804.2.1 SMT PCB Assembly804.2.1.1 Land Pattern and Stencil804.2.1.2 Board Level Characterization824.2.2 Moisture Sensitivity Level824.2.3 Soldering Conditions and Temperature834.2.3.1 Reflow Profile834.2.3.2 Maximum Temperature and Duration844.2.4 Durability and Mechanical Handling854.2.4.1 Storage Conditions854.2.4.2 Processing Life864.2.4.3 Baking864.2.4.4 Electrostatic Discharge864.3 Packaging874.3.1 Tape and Reel874.3.1.1 Orientation874.3.1.2 Barcode Label884.3.2 Shipping Materials894.3.2.1 Moisture Barrier Bag894.3.2.2 Transportation Box914.3.3 Trays925 Regulatory and Type Approval Information935.1 Directives and Standards935.2 SAR requirements specific to portable mobiles965.3 Reference Equipment for Type Approval975.4 Compliance with FCC and IC Rules and Regulations986 Document Information1006.1 Revision History1006.2 Related Documents1006.3 Terms and Abbreviations1006.4 Safety Precaution Notes1047 Appendix1057.1 List of Parts and Accessories105크기: 1.58메가바이트페이지: 107Language: English매뉴얼 열기