User ManualTable of Contents1. Introduction61.1 Target Users61.2 Prerequisites61.3 Manual Structure62. GR47/GR48 Radio Devices72.1 About the GR47/GR48 Family72.2 Radio Devices in a Communication System72.3 Features92.4 Service and Support122.5 Precautions133. Abbreviations144. Mechanical Description174.1 Interface Description174.2 Physical Dimensions185. System Connector Interface195.1 Overview195.2 General Electrical and Logical Characteristics225.3 Grounds235.4 VCC - Regulated Power Supply Input235.5 Battery Charging Input (CHG_IN)245.6 Turning the Radio Device ON/OFF and the External Power Signal255.7 Analogue Audio295.8 PCM Digital Audio335.9 Serial Data Interfaces365.10 SIM Card Related Signals405.11 Service/Programming415.12 Buzzer425.13 LED425.14 General Purpose Digital I/O Ports435.15 Extended I/O capabilities445.16 General Purpose Analogue I/O Ports455.17 External I 2C Serial Control Bus485.18 TX_ON - Burst Transmission495.19 Real Time Clock496. Antenna Connector517. Keyboard Interface527.1 IO#/KEYROW#527.2 KEYCOL#528. Hints for Integrating the Radio Device548.1 Safety Advice and Precautions548.2 Installation of the Radio Device568.3 Antenna589. Embedded Applications609.1 Features609.2 Implementation6010. TCP/IP Stack6210.1 Implementation6211. Technical Data6312. Declaration of Conformity6513. Introduction to the Developer’s Kit6713.1 Contents of the Kit6713.2 General Functioning of the Kit6814. Using the Developer’s Kit7114.1 Start up Check List7214.2 Developer’s Board Overlay7314.3 Jumpers7414.4 Switches7814.5 Headers7914.6 Connectors8014.7 LED Indicators8214.8 System Connector Pin Assignments83Size: 1.16 MBPages: 84Language: EnglishOpen manual