Nokia RM-235 Service Manual page 191

RM-235
System module and user interface
Introduction............................................................................................................................................................8-5
Phone description .............................................................................................................................................8-5
Energy management..............................................................................................................................................8-6
Battery and charging ........................................................................................................................................8-6
Backup battery...................................................................................................................................................8-7
Normal and extreme voltages .........................................................................................................................8-7
Power key and system power-up ....................................................................................................................8-7
Power distribution ............................................................................................................................................8-8
Clocking scheme ................................................................................................................................................8-8
Bluetooth and FM RDS radio
GPS module ..........................................................................................................................................................
WLAN module ......................................................................................................................................................
FM transmitter module
High-speed USB....................................................................................................................................................
CBUS interface......................................................................................................................................................
FBUS ......................................................................................................................................................................
ECI interface .........................................................................................................................................................
Charger interface .................................................................................................................................................
SIM interface ........................................................................................................................................................
MicroSD card interface
Camera concept ...................................................................................................................................................
Camera concept ..............................................................................................................................................
User interface.......................................................................................................................................................
User interface..................................................................................................................................................
I/O expander and keyboard
Display module ...............................................................................................................................................
Backlight and illumination............................................................................................................................
Ambient Light Sensor.....................................................................................................................................
ASICs......................................................................................................................................................................
RAPIDOYAWE ..................................................................................................................................................
EM ASIC BETTY N2300
EM ASIC VILMA N2200
Device memories .................................................................................................................................................
Combo memory ..............................................................................................................................................
Audio concept ......................................................................................................................................................
Audio HW architecture...................................................................................................................................
Internal microphone
Internal earpiece ............................................................................................................................................
Internal speakers............................................................................................................................................
Vibra circuitry .................................................................................................................................................
Accessory AV connector
Baseband technical specifications.....................................................................................................................
External interfaces
SIM IF connections..........................................................................................................................................
Charger connector and charging interface connections & electrical characteristics
Internal interfaces..........................................................................................................................................
Back-up battery interface electrical
RF technical description......................................................................................................................................
Receiver (RX) ...................................................................................................................................................
Transmitter (TX) .............................................................................................................................................
Issue 1
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characteristics....................................................................................
COMPANY CONFIDENTIAL
Copyright © 2008 Nokia. All rights reserved.
Table of Contents
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8-11
8-11
8-12
8-12
8-12
8-13
8-13
8-13
8-13
8-14
8-14
8-14
8-15
8-15
8-16
8-17
8-18
8-18
8-19
8-19
8-19
8-19
8-20
8-20
8-20
8-20
8-21
8-22
8-22
8-22
8-23
8-24
8-24
8-24
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8-25
8-25
8-25
8-25
8-26
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