User Guide

NSB-9
System Module and User Interface CCS Technical Documentation
Page 8 Nokia Corporation Issue 1 04/03
System Module: Baseband
Baseband Module, technical summary
Main functionality of the NSB-9 baseband is implemented with two ASICs: UPP (Univer-
sal Phone Processor) and UEM (Universal Energy Management).
Figure 1: 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) regulators 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
has supports both 1.8V and 3V SIM cards.
A real time clock function is integrated into the UEM which utilizes the same 32kHz
clock supply as the sleep clock. A backup power supply is provided for the RTC which
keeps the real time clock running when the main battery is removed. The backup power
supply is a rechargeable surface mounted battery (capacitor type). The backup time with
the battery is 30 minutes minimum.
The analog interface between the baseband and the RF section is handled by a UEM
ASIC. UEM provides A/D and D/A conversion of the in-phase and quadrature receive and
transmit signal paths and also A/D and D/A conversions of received and transmitted
UEMK UPP8M
RF interface
(GSM)
Memories
128M FLASH
(incl. EEPROM)
8M SRAM
FM radio
Battery
BLC-2
ENGINE
KEYBOARD
SIM
IR
LCD
System connector
Tomahawk
DC
jack
Charger
VOUT
2.8V
Mo/St Amp
LM4855
L
R
LED driver
VIBRA
HALL sw.
FLIP
KEYBOARD
uC
1.8V
UEMK UPP8M
RF interface
(GSM)
Memories
128M FLASH
(incl. EEPROM)
8M SRAM
FM radio
Battery
BLC-2
ENGINE
KEYBOARD
SIM
IR
LCD
System connector
Tomahawk
DC
jack
System connector
Tomahawk
DC
jack
Charger
VOUT
2.8V
Mo/St Amp
LM4855
L
R
LED driver
VIBRA
HALL sw.
FLIP
KEYBOARD
uC
1.8V