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TFE-4/RV-1
TF4 Technical Information
Block diagram of Engine Board
*** Note: RS232 facility is only utilised in the N810 ***
B2B Power/
RS232-
Connector
SIM
B2B System connector
A block diagram is shown in Figure 1. The baseband module contains 2 Asics namely the
Universal Energy Management (UEM) and the Universal Phone Processor (UPP). The
baseband module furthermore contains the Bluetooth module. The baseband is based on
the DCT4 engine program.
The UEM supplies both the baseband module as well as the RF module with a series of
voltage regulators. The RF module is supplied with regulated voltages 4.75 V and 2.78 V
and the baseband module with 2.78 V and 1.80 V. The UEM is furthermore supplying the
baseband SIM interface with a programmable voltage of either 1.8 V or 3.0 V and the
core of the UPP is supplied with a programmable voltage of 1.0 V, 1.3 V, 1.5 V or 1.8 V.
The UEM contains a series of PWM sourced drivers. The individual PWM signals are gen-
erated internally within the digital part of the UEM and distributed to the drivers.
The UEM contains a real-time clock sliced down from the 32768 Hz crystal oscillator. The
32768 Hz clock is fed to the UPP as a sleep clock.
Page 8b-6
Company Confidential
RS232
RF (Mjölner)
PA Supply
RF Supplies
UEM
MBus/FBus
Audio
Controllines
Figure 1: Block Diagram of the Engine Board
Copyright © 2005 Nokia Corporation.
Company Confidential
Clock
26 MHz
Clock
RF RX/TX
26 MHz
RF RX/TX
SIMIF
SLEEPCLK
32kHz
CBUS/
DBUS
BB
Supplies
Baseband
Nokia Customer Care
Bluetooth
CBUS
USART
UPP
FLASH
Issue 2.0 Mar/2005
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