Figure 7: Block Diagram - Nokia NSB-5 Series Technical Documentation Manual

PAMS Technical Documentation
mined by some network parameters. When the sleep mode is entered both the MCU and
the DSP are in standby mode and the normal VCTCXO clock has been switched off.
The battery voltage range in DCT3 family is 3.0V to 4.5V depending on the battery charge
and used cell type (Li–Ion or NiMH). Because of the lower battery voltage the baseband
supply voltage is lowered to a nominal of 2.8V.
The baseband is running from a 2.8V power rail which is supplied by a power controlling
asic (CCONT). In the CCONT there are seven individually controlled regulator outputs for
the RF section, one 2.8V output for the baseband plus a core voltage for MAD2WD1.
However this is not used in NSB–5 because the chipset supports 2.8 Volts. In addition
there is one +5V power supply output(V5V). TheCCONTalso contains a SIM interface
which supports both 3V and 5V SIM cards. A real time clock function is integrated into
the CCONT 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 polyacene battery
with a backup time of ten minutes.
The interface between the baseband and the RF section is handled by a specific asic. The
COBBA_GJP asic 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 UI parts. Data transmission between the
COBBA_GJP and the MAD2WD1 is implemented using serial connections. Digital speech
processing is handled by the MAD2WD1 asic. The COBBA_GJP asic is a dual supply volt-
age circuit, the digital parts are running from the baseband supply VBB and the analog
parts are running from the analog supply VCOBBA (VR6).
TX/RX SIGNALS
COBBA_GJP
LCD
vibra
motor
IR
roller
AUDIOLINES
BASEBAND
Issue 1 03/01
RF SUPPLIES
COBBA SUPPLY
CCONT
BB SUPPLY
core voltage
MAD2WD1
+
MEMORIES
SYSCON

Figure 7: Block Diagram

Nokia Mobile Phones Ltd.
PA SUPPLY 13MHz
CLK
SIM
32kHz
CLK
SLEEP CLOCK
VBAT
CHAPS
NSB-5
System Module
SYSTEM CLOCK
BATTERY
NiMH LiIon
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