User Guide

CCS Technical Documentation System Module and User Interface
NPM-6/6X
Issue 2 06/03 Nokia Corporation. Page 11
Block Diagram
Figure 2: Baseband block diagram
Technical Summary
Baseband of the NPM-6/6X 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 regulator for RF. It also includes
4 current sources for biasing purposes and internal usage. UEM also includes SIM inter-
face 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-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
battery is 30 minutes minimum.
The interface between the baseband and the RF section is mainly handled by the UEM
ASIC. The 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
audio signals to and from the user interface. The UEM supplies the analog TXC and AFC
signals to RF section according to the UPP DSP digital control.
UEM
v4
UPP8M
v2
FLASH
64Mbit
(incl. EEPROM)
RF Interface
Vibra
FM radio
TEA5767
St
Mo/St Amp
LM4855
Battery
BL-4C
Keyboard
SIM
DCT-3
1.8 V
IR
LCD
Passive colour STN
System connector
Tomahawk
DC
j
ack
Charger
Accessory
Regulator
IHF
Keyboard
Illumination
Flashlight
SRAM
4Mbit