사용자 설명서차례Document History8Introduction11Supported Software and Hardware Releases11Related Documents12Terms and Abbreviations13Type Approval17Safety Precautions19Product Concept21XT55/56 Key Features at a Glance22Circuit Concept25GSM Application Interface27GSM/GPRS Operating Modes27Power Supply29Power Supply Pins on the Board-to-Board Connector29Minimizing Power Losses30Monitoring Power Supply30Power Up / Down Scenarios31Turn on the GSM Part of XT55/5631Turn on the GSM Part of XT55/56 Using the Ignition Line GSM_32Timing of the Ignition Process33Turn on the GSM Part of XT55/56 Using the GSM_POWER Signal34Turn on the GSM Part of XT55/56 Using the RTC (Alarm Mode)34Turn off the GSM Part of XT55/5635Turn off GSM Part of the XT55/56 Module Using AT^SMSO36Emergency Shutdown Using GSM_EMERGOFF Pin37Automatic Shutdown38Temperature Dependent Shutdown38Temperature Control during Emergency Call39Undervoltage Shutdown if Battery NTC is Present39Undervoltage Shutdown if no Battery NTC is Present40Overvoltage Shutdown40Automatic GPRS Multislot Class Change41Charging Control of the GSM Part42Battery Pack Characteristics44Recommended Battery Pack Specification45Implemented Charging Technique46Operating Modes during Charging48Charger Requirements49Power Saving50No Power Saving (AT+CFUN=1)50NON-CYCLIC SLEEP Mode (AT+CFUN=0)50CYCLIC SLEEP Mode (AT+CFUN=5, 6, 7, 8)51CYCLIC SLEEP Mode AT+CFUN=951Timing of the GSM_CTS Signal in CYCLIC SLEEP Modes51Wake up XT55/56 from SLEEP Mode53Wake-up via /RTS0 and RTS1 (if AT+CFUN=0 or AT+CFUN=9)54Summary of State Transitions (Except SLEEP Mode)55RTC Backup for GSM Part of XT55/5656Serial Interfaces of the XT55/56 GSM Part57Features of the first Serial Interface of the GSM Part (ASC057Features of the second Serial Interface of GSM Part (ASC1)58ASC0 and ASC1 Configuration58Audio Interfaces59Microphone Circuit60Speech Processing61DAI Timing61SIM Interface63Requirements for Using the GSM_CCIN Pin64Design Considerations for SIM Card Holder65Control Signals66Inputs66Outputs67Synchronization Signal67Using the GSM_SYNC Pin to Control a Status LED68Behavior of the GSM_RING0 Line (ASC0 Interface only)70GPS Application Interface71Theory of Operation71Technical Data72GPS Operating Modes73Trickle Power Mode74Comparison of Trickle Power and Push-to-Fix Mode75Power Supply of the XT55/56 GPS Part76General Purpose Input/Output (GPIO)76Serial Interfaces of the XT55/56 GPS Part77GPS Control Signals77Receiver Architecture78Operation Procedure79Start-up Procedures80Coldstart80Warmstart80Hotstart80GSM and GPS Antenna Interfaces81GSM Antenna Installation81GSM antenna Connector81GSM Antenna Pad83Installing the GPS Antenna83Hirose Antenna Connector84Electrical, Reliability and Radio Characteristics88Absolute Maximum Ratings88Operating Temperatures88Pin Description90Power Supply Ratings96Current Consumption during GSM Transmit Burst98Electrical Characteristics of the Voiceband Part103Setting Audio Parameters by AT Commands103Audio Programming Model104Characteristics of Audio Modes105Voiceband Receive Path106Voiceband Transmit Path107Air Interface of the XT55/56 GSM Part108Electrostatic Discharge109Reliability Characteristics110Mechanics111Mechanical Dimensions of XT55/56111Mounting XT55/56 onto the Application Platform113Board-to-Board Connector115Reference Approval117Reference Equipment for Type Approval117Compliance with FCC Rules and Regulations (XT55 only)118Compliance with FCC Rules and Regulations (XT56 only)119Example Applications120List of Parts and Accessories124크기: 2.04메가바이트페이지: 125Language: English매뉴얼 열기