User Guide

Issue 1 12/04 COMPANY CONFIDENTIAL 9

RAE-6/RA-4

6 - Baseband Description and Troubleshooting Nokia Customer Care

Baseband Top-Level Description

RAE-6/RA-4 HW architecture consists of:

• Two colour displays

• QWERTY keyboard

• Cover keyboard

• Engine PWB

There are three PWBs: main engine board, QWERTY flex and UI flex. Both displays and the

cover keyboard are connected to the engine via the UI flex. The QWERTY keyboard is con-

nected to the engine through a QWERTY controller.

RAE-6/RA-4 engine PWB architecture consists of four main building blocks:

• Application Processor Engine (APE)

• Cellular Mobile Telephone (CMT)

•CMT RF

The APE part is constructed using OMAP1510 processor with external SDRAM and NAND

based flash memory as the core. Other major parts for APE are power supplies, UI interfaces,

audio support and Bluetooth.

APE and CMT parts are connected together by serial communication buses and by a few con-

trol lines. The APE part reset and power control comes from the CMT side. Audio control is

mostly on the APE side. APE and CMT operate with no clear master-slave nomination.

The diagram below shows a high level block diagram of RAE-6/RA-4.