Introduction; Phone Description; Functional Description; Main Components - Nokia N900 Service Manual

RX-51
System Module

Introduction

Phone description

The device consists of two main mechanical blocks. The lower block holds the main PWB with most of the
electrical components. The upper block is basically the main flex that is connected to the main PWB with a
board-to-board connector. The upper block has the display, touch screen, ambient light sensor, secondary
camera, proximity sensor, RGB indication LED and earpiece.

Functional description

Baseband can be divided into two larger blocks. The application engine (APE) side runs with Linux operating
system which is controlled by OMAP3430 application processor. Most of the peripherals are connected to that.
Also OMAP controls the other major baseband block, the cellular engine side (CMT). The application engine
has 2Gbit of NAND flash and 2Gbit of SDRAM. Memory is stacked on top of the application processor.

Main components

Function
Application engine
Application engine EM
ASIC
APE memory
Cellular engine
Issue 1
Figure 48 System level block diagram
Description
OMAP3430
GAIA
Combo 2G DDR/2G M3
RapuYama
COMPANY CONFIDENTIAL
Copyright © 2009 Nokia. All rights reserved.
Item ref
D4800
D4200
D5000
D2800
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