Baseband Description; System Module Block Diagram; Baseband Functional Description; Application Processor - Nokia RX-44 Service Manual

RX-44
System Module

Baseband description

System module block diagram

The device consists of four different main modules: engine (2 EH), Main flex (2FC), Top Flex (2FD) , camera
and LCD module. The engine module consists of BB and RF components. Connection between UI flexies,,
camera and display is done with board-to-board connectors.
Figure 36 RX-44 system block diagram

Baseband functional description

The device is based on OMAP2420 (D4800) application processor on top of which the SDRAM / MuxOneNAND
combo memory is stacked. More detailed information about OMAP2420 (D4800) is presented in the following
chapter. EM asics are EM ASIC Vilma D1420, EM ASIC Betty N1310 and EM ASIC Menelaus N4200. Keyboard and
its lightning are controlled by N4300, AIC33 audio codec is N4100 and touch pad controller N1530. HS-USB
interface goes via USB controller ASIC N5350 and USB EM ASIC N5350. WVGA display has external display frame
buffer D1510.

Application processor

The application processor OMAP2420 (D4800) is also called an application ASIC because it is processing
application SW and handles the UI SW. It consists of the application processor and peripheral subsystems
such as camera, display and keyboard driver blocks.
In addition to interfaces mentioned above, the peripherals block includes several different I/O interfaces, for
example, for keyboard, audio, Bluetooth and WLAN.
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