Nokia 6255 Description And Troubleshooting page 6

6255/6255i6256/6256i (RM-19)
Baseband Description and Troubleshooting
Battery
Zocus
UHS Jack
DC Jack
Nut
Tomahawk
USB
Antenna
Bluetooth
GPS
UART
19.2 MHz
FM Radio
Flash Memory Flash Memory
(Program, (User, NAND)
NOR)
SDRAM
VCORE
SMPS
Page 6
Production
Test IF
UEME
Charge Control
FBUS / MBUS
VIO
D
RF
B
U
S
Tiku EDGE
PCM / UART
MCU ARM925
C-DSP Lead3
A-DSP Lead 3
2G System Logic
Figure 1: Baseband block diagram
©2005 Nokia Corporation
Sim
MMC
Regulation
Audio
SIM I/F
RTC
PDRAM
Company Confidential
Nokia Customer Care
Regulator
32 KHz
Mic
IHF Speaker
Amplifier
EarPiece
Vibra
Disp BL's
PWM
PWM
Cam Flash
Int Display
Parallel
Ext Display
Serial
Keyboard
EL
Camera
IRDA
Issue 2 05/2005