Nokia 2600 服务手册
RH-59/60
Nokia Customer Care
7-System Module
10
COMPANY CONFIDENTIAL
ISSUE 1 09/2004
Copyright © 2004 Nokia. All Rights Reserved.
for RF. The UEM is furthermore supplying the baseband SIM interface with a programmable
voltage of either 1.8 V or 3.0 V. 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.
voltage of either 1.8 V or 3.0 V. 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.
UPP operates from a 26MHz clock, coming from the RF ASIC MJOELNER, the 26 MHz clock
is internally divided by two, to the nominal system clock of 13MHz. DSP and MCU contain
phase locked loop (PLL) clock multipliers, which can multiply the system.
is internally divided by two, to the nominal system clock of 13MHz. DSP and MCU contain
phase locked loop (PLL) clock multipliers, which can multiply the system.
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.
32768 Hz clock is fed to the UPP as a sleep clock.
The communication between the UEM and the UPP is done via the bi-directional serial busses
CBUS and DBUS. The CBUS is controlled by the MCU and operates at a speed of 1 MHz set
by SW. The DBUS is controlled by the DSP and operates at a speed of 13 MHz. Both proces-
sors are located in the UPP.
CBUS and DBUS. The CBUS is controlled by the MCU and operates at a speed of 1 MHz set
by SW. The DBUS is controlled by the DSP and operates at a speed of 13 MHz. Both proces-
sors are located in the UPP.
The UEM ASIC mainly handles the interface between the baseband and the RF section. 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 signals to RF section according to the UPP
DSP digital control.
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 signals to RF section according to the UPP
DSP digital control.
RF ASIC MJOELNER is controlled through UPP RFBUS serial interface. There are also sepa-
rate signals for PDM coded audio. Digital speech processing is handled by the DSP inside UPP
ASIC. UEM is a dual voltage circuit, the digital parts are running from the baseband supply 1.8V
and the analog parts are running from the analog supply 2.78V, also VBAT is directly used by
some blocks.
rate signals for PDM coded audio. Digital speech processing is handled by the DSP inside UPP
ASIC. UEM is a dual voltage circuit, the digital parts are running from the baseband supply 1.8V
and the analog parts are running from the analog supply 2.78V, also VBAT is directly used by
some blocks.
The baseband supports both internal and external microphone inputs and speaker outputs.
The transceiver module is implemented on 6 layer selective OSP/Gold coated PWB.
■
Modes of operation
baseband has six different operating modes (in normal mode):
•No_Supply
•Power_off
•Acting_Dead
•Active
•Sleep
•Charging
•Power_off
•Acting_Dead
•Active
•Sleep
•Charging
Additionally two modes exist for product verification: 'testmode' and 'local mode'.
No supply
In No_Supply mode, the phone has no supply voltage. This mode is due to disconnection of
main battery or low battery voltage level.
main battery or low battery voltage level.
Phone is exiting from No_Supply mode when sufficient battery voltage level is detected. Battery
voltage can rise either by connecting a new battery with VBAT > V
voltage can rise either by connecting a new battery with VBAT > V
mstr+
or by connecting charg-
er and charging the battery above V
mstr+
.