Technical Summary; Fig 2 Baseband Blocks - Nokia NPL-4 Series Manual

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Technical summary

The picture below shows the main Baseband function blocks
LCD
Passive colour
STN
SIM
Vibra
Keyboard
Illumination
Display
Illumination
Flashlight
DC/
DC
BATTERY BL-5B
DC
Charge
jack
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. UEMEK includes 7 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. UEMEK also includes SIM interface
which has supports both 1.8V and 3V SIM cards. Note: 5V SIM cards are no longer sup-
ported by DCT-4 generation baseband.
A real time clock function is integrated into the UEMEK, 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.
A UEMEK ASIC handles the analog interface between the baseband and the RF section.
UEMEK 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 UEMEK supplies the analog TXC and AFC signals to RF section according to the UPP
DSP digital control. Data transmission between the UEMEK and the UPP is implemented
using two serial busses, DBUS for DSP and CBUS for MCU. There are also separate signals
for PDM coded audio. Digital speech processing is handled by the DSP inside UPP ASIC.
Copyright © 2005 Nokia Corporation. All rights reserved.
Issue 2 05/05
Figure 2: Baseband blocks.
RF Interface
IHF
D-class
UEMEk
Amplifier
System connector
Tomahaw
k
System Module and User Interface
Compass
PSRAM
COMBO
128Mbit
Flash
16Mbit
PSRAM
UPP8M
V4.2
Keyboard
1.8 V
TEA5767
St
VGA VV6450
HWA
STV0900
FCI
NPL-4/5/
IR
FM radio
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