Baseband Module; Block Diagram; Technical Summary - Nokia NSE–3 SERIES Service Manual

NSE–3
System Module

Baseband Module

Block Diagram

TX/RX SIGNALS
COBBA
UI
IR
AUDIOLINES
BASEBAND

Technical Summary

The baseband module consists of four asics, CHAPS, CCONT, COBBA–
GJ and MAD2, which take care of the baseband functions of NSE–3.
The baseband is running from a 2.8V power rail, which is supplied by a
power controlling asic. In the CCONT asic there are 6 individually con-
trolled regulator outputs for RF–section and two outputs for the base-
band. In addition there is one +5V power supply output (V5V) for flash
programming voltage and other purposes where a higher voltage is need-
ed. The CCONT contains also 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 sup-
ply is a rechargable polyacene battery. The backup time with this battery
is minimum of ten minutes.
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RF SUPPLIES
COBBA SUPPLY
CCONT
BB SUPPLY
MAD
+
MEMORIES
SYSCON
Technical Documentation
PA SUPPLY 13MHz
CLK
SIM
32kHz
CLK
SLEEP CLOCK
VBAT
CHAPS
Original 11/97
PAMS
SYSTEM CLOCK
BATTERY