Motorola i897 - Essentials; About This Guide and Phone Basics

CONTENTS
SAFETY AND GENERAL INFORMATION............................................v
MODEL INFORMATION...............................................................................ix
MODEL SPECIFICATIONS......................................................................x
PREFACE ...................................................................................................xi
CONTENTS ................................................................................................xiii
Chapter 1 ....................................................................................................17
SYSTEM OVERVIEW ..................................................................................17
1.1 iDEN Digital Modulation Technology......................................................................................... 17
1.2 iDEN Voice Compression Technology ........................................................................................ 19
1.2.1 RF Transmission Bursts......................................................................................................................... 19
1.2.2 Calling Area Coverage........................................................................................................................... 20
1.2.3 Service Area........................................................................................................................................... 21
1.3 Radio Architecture Overview......................................................................................................22
1.4 Roadrunner Circuitry ..................................................................................................................23
1.5 Audio Section ............................................................................................................................... 25
1.5.1 Acoustic Transducers............................................................................................................................. 25
1.5.2 Audio Amplifiers................................................................................................................................... 25
1.5.3 Audio Modes.......................................................................................................................................... 27
1.5.4 Audio Paths............................................................................................................................................ 27
1.5.5 Transmit Paths ....................................................................................................................................... 28
1.5.6 Receive Paths......................................................................................................................................... 28
1.6 Digital Section ...............................................................................................................................28
1.6.1 Zeus Processor....................................................................................................................................... 29
1.6.2 MCU Digital Phase Locked Loop (DPLL)............................................................................................ 30
1.6.3 Host System Clock Synthesizer............................................................................................................. 30
1.6.4 Host System Clock Synthesizer............................................................................................................. 30
1.6.5 ZEUS Digital Signal Processor.............................................................................................................. 31
1.6.6 DSP Phase Locked Loop (PLL)............................................................................................................. 31
1.6.7 Serial Peripheral Interface (SPI)............................................................................................................ 31
1.6.8 System Memory..................................................................................................................................... 32
1.6.9 USB2.0................................................................................................................................................... 32
1.6.10 Battery ID .............................................................................................................................................. 33
1.6.11 Keypad Block ........................................................................................................................................ 33
1.6.12 LCD Circuit ........................................................................................................................................... 34
1.6.13 CMOS 2.0 Mega-pixel Focus Camera................................................................................................... 34
1.7 Transmitter Path Section ............................................................................................................. 35
1.7.1 ROADRUNNER.................................................................................................................................... 36
1.7.2 Sledgehammer IC (TX Path).................................................................................................................. 37
1.7.3 JANUS................................................................................................................................................... 37
1.7.4 Cartesian Feedback................................................................................................................................39
1.7.5 Level Set and Phase Training................................................................................................................. 40
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