User Guide

NSD-5
3. System Module PAMS Technical Documentation
Page 10 Nokia Corporation Issue 1 05/02
Baseband Module and Interface
Block Diagram
Figure 2: Baseband Module and Interface Block Diagram
Baseband Elements
Baseband refers to all technology elements in the phone design, which do not include RF
functions. The Baseband Module therefore includes audio, logic control, signal process-
ing, power supply, and user interface functions. Baseband functionality of this product
consists of third generation Digital Core Technology (DCT3) design solutions.
Baseband ASICS Description
MAD4
The MAD4 submodule includes the MAD4 ASIC (MCU, DSP, System Logic), external mem-
ories, and VIBRA circuitry.
The MCU block is used for general purpose processing applications such as UI control,
timers, PUP control, RX modem interface, audio control, evaluation of sensor data from
CCONT A\D, and battery charging control.
The DSP accommodates all communication protocols, such as CDMA data processing.
DSP also handles speech signal processing (e.g., vocodor).
The System Logic component includes: peripheral interface (MCU Parallel I/O, Serial I/O
[FBUS/MBUS]) and PWM control; accessory interface (FBUS); external memories inter-
face; RF interface and control; clocking, timing, and interrupts; sleep control; CAFE con-
trol; user interface control; reset generator; clock generator; and test interface.
CCONT
UI
MAD
SYSCON
CHARGING
Cafe
BATTERY
PA SUPPLY
RF SUPPLIES
BB SUPPLY
TX/RX SIGNALS
BASEBAND
VBAT
+
MEMORIES
Cafe SUPPLY
SWITCH
AUDIOLINES
32kHz
CLK
19.2MHzCLK
SLEEP CLOCK
SYSTEM CLOCK