Nokia n80 User Manual page 311

RM-91; RM-92
System Module
Baseband description............................................................................................................................................9-7
System module block diagram........................................................................................................................9-7
Baseband functional description.....................................................................................................................9-8
Absolute maximum ratings..............................................................................................................................9-8
Phone modes of operation...............................................................................................................................9-8
Power distribution..........................................................................................................................................9-10
Clocking scheme..............................................................................................................................................9-11
Bluetooth.........................................................................................................................................................9-12
FM radio............................................................................................................................................................9-12
USB....................................................................................................................................................................9-13
SIM interface....................................................................................................................................................9-13
IrDA interface...................................................................................................................................................9-14
SD card interface.............................................................................................................................................9-14
WLAN interface................................................................................................................................................9-14
Battery interface..............................................................................................................................................9-14
Camera interfaces............................................................................................................................................9-14
Back camera interface...............................................................................................................................9-14
Camera construction..................................................................................................................................9-15
Flash LED.....................................................................................................................................................9-15
Front camera..............................................................................................................................................9-16
User interface..................................................................................................................................................9-17
Main flexi..........................................................................................................................................................9-17
Slide position sensor.......................................................................................................................................9-17
Keyboards........................................................................................................................................................9-18
Display interface..............................................................................................................................................9-20
Display and keyboard backlight.....................................................................................................................9-20
ALS interface....................................................................................................................................................9-21
ASICs.................................................................................................................................................................9-22
RAP ASIC.......................................................................................................................................................9-22
EM ASIC N2200............................................................................................................................................9-22
EM ASIC N2300............................................................................................................................................9-22
Device memories.............................................................................................................................................9-23
RAP memories NOR flash and SDRAM.......................................................................................................9-23
Combo memory..........................................................................................................................................9-23
Audio concept.......................................................................................................................................................9-23
Audio HW architecture....................................................................................................................................9-23
Internal microphone.......................................................................................................................................9-24
External microphone.......................................................................................................................................9-24
Internal earpiece.............................................................................................................................................9-25
Internal speaker..............................................................................................................................................9-25
External earpiece.............................................................................................................................................9-26
Vibra circuitry..................................................................................................................................................9-26
System connector............................................................................................................................................9-27
Baseband technical specifications......................................................................................................................9-28
External interfaces..........................................................................................................................................9-28
External interfaces.....................................................................................................................................9-28
ACI interface electrical characteristics.....................................................................................................9-28
VOUT electrical characteristics..................................................................................................................9-29
USB IF electrical characteristics................................................................................................................9-29
FBUS interface electrical characteristics (between RAP and N2300)....................................................9-30
Issue 1
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