User Guide
Table Of Contents
- System Module and User Interface
- Glossary of Terms
- Introduction
- System Module : Baseband
- Baseband Functional Description
- RF Module Introduction
- RF characteristics
- User Interface Modules
- Schematic Diagrams UI
- Schematic Diagrams TRX
- Return to main TOC

NHL-4/4U &RPSDQ\FRQILGHQWLDO
System Module and User Interface CCS Technical Documentation
3DJH 1RNLD&RUSRUDWLRQ ,VVXH
7DEOHRI&RQWHQWV
3DJH1R
Glossary of Terms.......................................................................................................... 5
Introduction.................................................................................................................... 8
Electrical Modules .......................................................................................................8
Interconnection Diagram .............................................................................................8
Temperature Conditions ..............................................................................................9
Humidity ......................................................................................................................9
System Module : Baseband.......................................................................................... 10
Baseband Module, technical summary ......................................................................10
Technical Summary ...................................................................................................11
Environmental Specifications ....................................................................................11
Temperature Conditions.......................................................................................... 11
Humidity and Water Resistance.............................................................................. 12
Baseband Technical Specifications ...........................................................................13
Absolute Maximum Ratings.................................................................................... 13
DC Characteristics................................................................................................... 13
Power Distribution diagram .................................................................................... 15
Baseband External and Internal Signals and Connections ........................................16
Integrated HF Speaker............................................................................................. 17
FM Radio Interface ................................................................................................. 17
Internal Speaker....................................................................................................... 18
Integrated HF Speaker............................................................................................. 18
External Signals and Connections .............................................................................22
Keyboard (board-to-board) Connector.................................................................... 22
LCD Connector (Board to Board)........................................................................... 23
DC Connector.......................................................................................................... 24
Bottom Connector ................................................................................................... 24
SIM connector......................................................................................................... 25
Internal Signals and Connections............................................................................ 25
Baseband Functional Description ................................................................................ 27
Modes of Operation ...................................................................................................27
No Supply................................................................................................................ 27
Back-up ................................................................................................................... 27
Acting Dead............................................................................................................. 27
Active ...................................................................................................................... 27
Sleep Mode.............................................................................................................. 28
Charging.................................................................................................................. 28
Battery..................................................................................................................... 28
Power Up and Reset ...................................................................................................29
Power Up with PWR key ........................................................................................ 30
Power Up when Charger is connected .................................................................... 30
Power Up when Battery is connected ..................................................................... 30
RTC Alarm Power Up............................................................................................. 31
A/D Channels .............................................................................................................31
FM Radio ...................................................................................................................32
IR Module ............................................................................................................... 32
SIM Interface........................................................................................................... 32
ACI.......................................................................................................................... 33










