Nokia 5110 Service Manual
PAMS
Technical Documentation
NSE–1
System Module
Original 03/98
Page 3 – 10
Baseband Module
Block Diagram
CCONT
UI
SIM
MAD
SYSCON
CHAPS
COBBA
BATTERY
PA SUPPLY
RF SUPPLIES
BB SUPPLY
TX/RX SIGNALS
BASEBAND
VBAT
+
MEMORIES
COBBA SUPPLY
AUDIOLINES
32kHz
CLK
CLK
13MHz
CLK
CLK
SLEEP CLOCK
SYSTEM CLOCK
Technical Summary
The baseband module consists of four asics, CHAPS, CCONT, COBBA–
GJ and MAD2, which take care of the baseband functions of NSE–1.
GJ and MAD2, which take care of the baseband functions of NSE–1.
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 VCP for RF–part.
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 supply is a
rechargable polyacene battery. The backup time with this battery is mini-
mum of ten minutes.
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 VCP for RF–part.
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 supply is a
rechargable polyacene battery. The backup time with this battery is mini-
mum of ten minutes.