Table of Contents
Baseband description............................................................................................................................................8–5
System module block diagram........................................................................................................................8–5
Baseband functional description.....................................................................................................................8–6
Absolute maximum ratings..............................................................................................................................8–6
Phone modes of operation...............................................................................................................................8–7
Operation modes...............................................................................................................................................8–8
Power distribution............................................................................................................................................8–9
Clocking scheme..............................................................................................................................................8–10
Bluetooth.........................................................................................................................................................8–10
IrDA...................................................................................................................................................................8–11
USB....................................................................................................................................................................8–11
SIM card............................................................................................................................................................8–11
RF-BB interface................................................................................................................................................8–11
FBUS..................................................................................................................................................................8–12
ACI interface.....................................................................................................................................................8–12
SIM interface....................................................................................................................................................8–13
MiniSD interface...............................................................................................................................................8–13
Battery interface..............................................................................................................................................8–14
User interface..................................................................................................................................................8–15
Display interface.........................................................................................................................................8–15
Keyboard.....................................................................................................................................................8–15
Display and keyboard backlight...............................................................................................................8–15
ALS interface...............................................................................................................................................8–15
E-Mail LED....................................................................................................................................................8–16
Audio concept.......................................................................................................................................................8–17
Audio HW architecture....................................................................................................................................8–17
Internal microphone.......................................................................................................................................8–18
Internal earpiece.............................................................................................................................................8–19
Internal speaker..............................................................................................................................................8–19
Vibra circuitry..................................................................................................................................................8–19
Baseband technical specifications......................................................................................................................8–20
External interfaces..........................................................................................................................................8–20
USB IF electrical characteristics......................................................................................................................8–20
FBUS interface electrical characteristics (between RAP and N2300).........................................................8–21
SIM IF connections...........................................................................................................................................8–21
MiniSD interface connections.........................................................................................................................8–22
Charger connector and charging interface connections & electrical characteristics...............................8–23
Battery interface electrical characteristics...................................................................................................8–24
Internal interfaces...........................................................................................................................................8–24
l2C.....................................................................................................................................................................8–24
Keyboard interface electrical characteristics................................................................................................8–24
Display connector and interface connections..............................................................................................8–25
Back-up battery interface electrical characteristics.....................................................................................8–26
Frequency mappings............................................................................................................................................8–27
GSM850 frequencies........................................................................................................................................8–27
EGSM900 frequencies......................................................................................................................................8–28
GSM1800 frequencies......................................................................................................................................8–29
GSM1900 frequencies......................................................................................................................................8–30
RM-88
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –3
Copyright © 2006 Nokia. All rights reserved.
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