User Guide

NPL-3 Company confidential
System Module and User Interface CCS Technical Documentation
Page 8 ãNokia Corporation. Issue 1 3/03
System Module: Baseband
The System module (or Engine) consists of Baseband and RF sub-modules, each described
below.
Baseband Module, technical summary
Main functionality of the baseband is implemented into two ASICs: UPP (Universal Phone
Processor) and UEM (Universal Energy Management).
Figure 2: Baseband block diagram
Baseband is running from power rails 2.8V analog voltage and 1.8V I/O voltage. UPP core
voltages can be lowered down to 1.0V, 1.3V and 1.5V. UEM includes 6 linear LDO (Low
Drop-Out) regulator for baseband and 7 regulators for RF. It also includes 4 current
sources for biasing purposes and internal usage. UEM also includes SIM interface which
supports both 1.8V and 3V SIM cards. Note: 5V SIM cards are no longer supported by
DCT-4 generation baseband.
A real time clock function is integrated into the UEM. RTC utilizes the same 32kHz clock
supply as the sleep clock. A backup power supply is provided for the RTC-battery, which
keeps the real time clock running when the main battery is removed. The backup power
supply is a rechargeable surface mounted Li-Ion battery. The backup time with the bat-
tery is 30 minutes minimum.
UEMK UPP8Mv3
Combo
Memory
DCT-4 Flash 64Mbit
SRAM 4Mbit
RF Interface
V
ibra
FM radio
TEA5767
Mo/St Amp
LM4855
Battery
BLD-3
Keyboard
SIM Reader
DCT-3
IR
1.8V
LCD
Passive colour STN
4096 color
System connector
Pop-Port
DC
jack
Charger
Accessory
Regulator
2.8V 70mA
IHF
RTC
battery
Led Driver
Keyboard &
display
illumination