User Guide

CCS Technical Documentation 7 - System Module & UI

Company Confidential NMM-3

Issue 1 (11/2003) Copyright  2003 Nokia Corporation Page 7-25

Company Confidential

Memory Block

PDRAM

The PDRAM block is the internal memory system for TIKU. It contains the following sub-

blocks:

• Boot ROM, containing MCU program code. The boot ROM size is 4k bytes (1k x

32).

• 256 Kbytes of x32 RAM (organized as 4 banks of 16k x 32) for the Cellular DSP

code.

• 256 Kbytes of x32 RAM (organized as 3 banks of 16k x 32 and 2 banks of 8k x 32)

for Application DSP code and data, all performance critical code is located here.

• One 4Kbytes (organized as 2k x 16) dual-port RAM, accessible by both Applica-

tion DSP and Cellular DSP.

External Flash Memory

NMM-3 uses conventional 128Mb “NOR” Flash for the program data and storage of

PMM calibration data, and a 256Mb “NAND” flash for the user data storage (pictures,

music, voice clips, etc).

Program Flash:

4341433 Samsung 128Mb Flash D451

User Flash

434xxxx Samsung 256Mb NAND Flash D450

External SDRAM

4341341 Samsung 64Mb SDRAM is used in NMM-3.

The SDRAM core supply is provided by regulator N450 and is the LP3987-2.85.

SDRAM core control in NMM-3 is as follows:

UEME

D200

EARP

EAR

UI Module