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LEON-G100/G200 - System Integration Manual

GSM.G1-HW-09002-C Preliminary Contents

Page 5 of 75

Contents

Preface ................................................................................................................................ 3

Contents .............................................................................................................................. 5

1 System description ....................................................................................................... 8

1.1 Overview .............................................................................................................................................. 8

1.2 Architecture .......................................................................................................................................... 9

1.2.1 Functional blocks ......................................................................................................................... 10

1.2.2 Hardware differences between LEON-G100 and LEON-G200 ...................................................... 10

1.3 Pin-out ............................................................................................................................................... 12

1.4 Operating Modes................................................................................................................................ 14

1.5 Power management ........................................................................................................................... 16

1.5.1 Power supply circuit overview ...................................................................................................... 16

1.5.2 Voltage supply (VCC) .................................................................................................................. 17

1.5.3 Battery charger (LEON-G200 only) ............................................................................................... 21

1.5.4 Voltage Backup Power (V_BCKP) ................................................................................................. 25

1.6 System functions ................................................................................................................................ 26

1.6.1 Module power on ....................................................................................................................... 26

1.6.2 Module power off ....................................................................................................................... 28

1.6.3 Module reset ............................................................................................................................... 29

1.7 RF connection ..................................................................................................................................... 31

1.8 Antenna supervisor ............................................................................................................................. 31

1.9 Audio ................................................................................................................................................. 31

1.9.1 Analog Audio interface ............................................................................................................... 32

1.9.2 Digital Audio interface (LEON-G200 only) .................................................................................... 37

1.9.3 Voiceband processing system ...................................................................................................... 39

1.10 SIM interface................................................................................................................................... 41

1.10.1 SIM functionality ......................................................................................................................... 42

1.11 Serial Communication ..................................................................................................................... 42

1.11.1 Asynchronous serial interface (UART)........................................................................................... 42

1.11.2 DDC (I

C) interface ...................................................................................................................... 47

1.12 ADC input (LEON-G100 only) .......................................................................................................... 48

1.13 General Purpose Input/Output (GPIO) ............................................................................................. 49

1.14 Approvals ........................................................................................................................................ 50

1.14.1 Compliance with FCC and IC Rules and Regulations .................................................................... 50

2 Design-In ..................................................................................................................... 51

2.1 Schematic design-in checklist .............................................................................................................. 51

2.2 Design Guidelines for Layout .............................................................................................................. 52

2.2.1 Layout guidelines per pin function ............................................................................................... 52

2.2.2 Footprint and paste mask ............................................................................................................ 58

2.2.3 Placement ................................................................................................................................... 60

1 2 3 4 5 6 7 8 9 10 ... 74 75

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