User Guide

Table of Contents
Baseband description............................................................................................................................................9–5
System module block diagram........................................................................................................................9–5
Baseband functional description.....................................................................................................................9–5
Absolute maximum ratings..............................................................................................................................9–6
Phone modes of operation...............................................................................................................................9–6
Power distribution............................................................................................................................................9–7
Clocking scheme................................................................................................................................................9–8
Bluetooth...........................................................................................................................................................9–8
USB......................................................................................................................................................................9–8
Accelerometer....................................................................................................................................................9–8
FM radio..............................................................................................................................................................9–9
Camera................................................................................................................................................................9–9
Backup battery...................................................................................................................................................9–9
CBUS interface....................................................................................................................................................9–9
FBUS....................................................................................................................................................................9–9
ACI interface.....................................................................................................................................................9–10
VOUT interface.................................................................................................................................................9–10
Charger interface.............................................................................................................................................9–10
MicroSD interface.............................................................................................................................................9–10
SIM/USIM...........................................................................................................................................................9–11
Battery interface..............................................................................................................................................9–12
User interface..................................................................................................................................................9–13
Display interface.........................................................................................................................................9–13
Keyboard.....................................................................................................................................................9–13
Backlights....................................................................................................................................................9–14
ASICs.................................................................................................................................................................9–14
RAPGSM ASIC................................................................................................................................................9–14
Retu EM ASIC N2200...................................................................................................................................9–14
Tahvo EM ASIC (N2300)..............................................................................................................................9–14
Device memories.............................................................................................................................................9–14
RAPGSM memories NOR flash and SDRAM................................................................................................9–14
Audio concept.......................................................................................................................................................9–14
Audio HW architecture....................................................................................................................................9–14
Internal microphone.......................................................................................................................................9–15
External microphone.......................................................................................................................................9–15
Internal earpiece.............................................................................................................................................9–15
Internal speakers.............................................................................................................................................9–16
External earpiece.............................................................................................................................................9–16
Vibra circuitry..................................................................................................................................................9–16
Baseband technical specifications......................................................................................................................9–17
External interfaces..........................................................................................................................................9–17
Pop-PortTM connector....................................................................................................................................9–17
SIM connections...............................................................................................................................................9–18
Charger connector and charging interface connections & electrical characteristics...............................9–19
Battery connector and interface connections & electrical characteristics................................................9–19
Internal interfaces...........................................................................................................................................9–20
IF connections..................................................................................................................................................9–20
Keyboard interface electrical characteristics................................................................................................9–22
Display connector and interface connections..............................................................................................9–23
Back-up battery interface electrical characteristics.....................................................................................9–23
RM-86
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 9 –3
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