User Guide

SDRAM core voltage (1.8 V) is generated from N2200 VDRAM and I/O voltage (1.8 V) is from VIO. NOR flash

uses VIO for both core and I/O voltages.

Combo memory

The application processor includes a 16-bit dedicated memory interface called external memory interface

fast (EMIFF).

Audio concept

Audio HW architecture

The functional core of the audio hardware is built around two ASICs: RAP and the EM ASIC N2200.

The EM ASIC N2200 provides an interface for the transducers and the accessory connector. Because audio

amplifiers are also integrated into the EM ASIC N2200, the only discrete electronics components for audio

paths are audio filtering components and EMC/ESD components.

There are three audio transducers:

• 8 mm dynamic earpiece

• 16 mm dynamic speaker

• electret microphone module

In addition to the audio transducers, the EM ASIC N2200 also provides an output for the dynamic vibra

component.

All galvanic audio accessories are connected to the system connector.

A Bluetooth audio module, which is connected to the RAP ASIC supports Bluetooth audio functionality.

There is also a separate application ASIC for Symbian applications.

RM-49

System Module Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 8 –17