BenutzerhandbuchInhaltsverzeichnisDocument History7Introduction9Related Documents9Terms and Abbreviations10Type Approval13SAR Requirements Specific to Portable Mobiles15Safety Precautions16Product Concept18Key Features at a Glance18AC65/AC75 System Overview21Circuit Concept22Application Interface23Operating Modes24Power Supply26Minimizing Power Losses26Measuring the Supply Voltage VBATT+27Monitoring Power Supply by AT Command27Power-Up / Power-Down Scenarios28Turn on AC65/AC7528Turn on AC65/AC75 Using Ignition Line IGT28Configuring the IGT Line for Use as ON/OFF Switch31Turn on AC65/AC75 Using the VCHARGE Signal32Reset AC65/AC75 via AT+CFUN Command32Reset or Turn off AC65/AC75 in Case of Emergency33Using EMERG_RST to Reset Application(s) or External Device(s33Signal States after Startup34Turn off AC65/AC7536Turn off AC65/AC75 Using AT Command36Leakage Current in Power-Down Mode37Turn on/off AC65/AC75 Applications with Integrated USB38Automatic Shutdown39Thermal Shutdown39Deferred Shutdown at Extreme Temperature Conditions40Monitoring the Board Temperature of AC65/AC7540Undervoltage Shutdown if Battery NTC is Present40Undervoltage Shutdown if no Battery NTC is Present41Overvoltage Shutdown41Automatic EGPRS/GPRS Multislot Class Change42Charging Control43Hardware Requirements43Software Requirements43Battery Pack Requirements44Charger Requirements45Implemented Charging Technique46Operating Modes during Charging47Power Saving49Network Dependency of SLEEP Modes49Timing of the CTSx Signal in CYCLIC SLEEP Mode 750Timing of the RTSx Signal in CYCLIC SLEEP Mode 950Summary of State Transitions (Except SLEEP Mode)51RTC Backup52SIM Interface53Installation Advice54Serial Interface ASC055Serial Interface ASC157USB Interface58I2C Interface59SPI Interface61Audio Interfaces63Speech Processing64Microphone Circuit64Single-ended Microphone Input65Differential Microphone Input66Line Input Configuration with OpAmp67Loudspeaker Circuit68Digital Audio Interface (DAI)69Master Mode70Slave Mode72GPIO Interface74Using the GPIO10 Pin as Pulse Counter74Control Signals75Synchronization Signal75Using the SYNC Pin to Control a Status LED76Behavior of the RING0 Line (ASC0 Interface only)77PWR_IND Signal77Antenna Interface78Antenna Diagnostic79Antenna Connector80Electrical, Reliability and Radio Characteristics82Absolute Maximum Ratings82Operating Temperatures83Storage Conditions84Reliability Characteristics85Pin Assignment and Signal Description86Power Supply Ratings93Electrical Characteristics of the Voiceband Part96Setting Audio Parameters by AT Commands96Audio Programming Model97Characteristics of Audio Modes98Voiceband Receive Path99Voiceband Transmit Path100Air Interface101Electrostatic Discharge102Mechanics103Mechanical Dimensions of AC65/AC75103Mounting AC65/AC75 to the Application Platform105Board-to-Board Application Connector106Sample Application109Reference Approval111Reference Equipment for Type Approval111Compliance with FCC Rules and Regulations112Appendix113List of Parts and Accessories113Fasteners and Fixings for Electronic Equipment115Fasteners from German Supplier ETTINGER GmbH115Größe: 2,69 MBSeiten: 118Language: EnglishHandbuch öffnen
