NSW-6
System Module SE2
PAMS Technical Documentation
Page 14
Issue 1 12/99
Nokia Mobile Phones Ltd.
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_D 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_D and the MAD
is implemented using serial connections. Digital speech processing is
handled by the MAD asic. The COBBA_D asic is a dual supply voltage
circuit, the digital parts are running from the baseband supply VBB and
the analog parts are running from the analog supply VCOBBA (VR6).
Block diagram for the phone is below.
CCONT
LCD
MAD1
CHAPS
COBBA_P
BATTERY
PA SUPPLY
RF SUPPLIES
BB SUPPLY
TX/RX SIGNALS
BASEBAND
VBAT
+
MEMORIES
COBBA SUPPLY
AUDIOLINES
32kHz
CLK
19.44M
CLK
SLEEP CLOCK
SYSTEM CLOCK
vibra
motor
NiMH LiIon
core voltage
CHARGER conn
Baseband Submodules
CTRLU
CTRLU comprises MAD ASIC (MCU, DSP, System Logic) and Memories.
The environment consists of two memory circuits; (FLASH, SRAM),
22–bit address bus, and 16–bit data bus. Also there are ROM1SELX,
ROM2SELX, and RAMSELX signals for chip selection.
