Nokia NSB-9 Service Manual page 16

NSB-9
System Module and User Interface
Table of Contents
Glossary of terms ........................................................................................................... 3
Introduction.................................................................................................................... 6
System Module: Baseband............................................................................................. 7
Baseband Module, technical summary ........................................................................7
Baseband Technical Specifications .............................................................................9
Absolute Maximum Ratings...................................................................................... 9
DC Characteristics..................................................................................................... 9
Power Distribution diagram .................................................................................... 11
Baseband External and Internal Signals and Connections ........................................12
Internal Signals and Connections............................................................................ 12
External Signals and Connections........................................................................... 18
Baseband Functional Description ................................................................................ 23
Modes of Operation ...................................................................................................23
No supply ................................................................................................................ 23
Backup..................................................................................................................... 23
Acting Dead............................................................................................................. 23
Active ...................................................................................................................... 23
Sleep mode .............................................................................................................. 24
Charging .................................................................................................................. 24
Power Up and Reset ...................................................................................................24
Power up with PWR key ......................................................................................... 25
Power up when charger is connected ...................................................................... 25
Power up when battery is connected ....................................................................... 26
RTC alarm power up ............................................................................................... 27
A/D Channels .............................................................................................................27
FM Radio ...................................................................................................................28
FM-radio audio connections.................................................................................... 29
Keyboards ..................................................................................................................29
Engine Keyboard..................................................................................................... 29
Flip .......................................................................................................................... 30
Flip keyboard........................................................................................................... 30
Flip position detection............................................................................................. 31
IR Module ..................................................................................................................31
SIM Interface .............................................................................................................31
System Connector ......................................................................................................33
External accessory regulator ......................................................................................33
Battery ........................................................................................................................34
Backup Battery ..........................................................................................................35
LCD & Keypad Illumination .....................................................................................36
LCD ...........................................................................................................................37
ACI ............................................................................................................................38
External Audio ...........................................................................................................38
External Microphone Connection ........................................................................... 38
External Earphone Connections .............................................................................. 40
Internal Audio ............................................................................................................40
Internal Microphone................................................................................................ 40
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Nokia Corporation
CCS Technical Documentation
Issue 1 04/03
Page No