User Guide

Figure 59 Audio block diagram

Internal microphone

Internal microphone is used for HandPortable (HP) and Internal HandsFree (IHF) call modes.

An analogue electret microphone is connected to N2200 Mic1P and Mic1N inputs via asymmetric electrical

connection.

Figure 60 Internal microphone circuitry

External microphone

Galvanic accessories are connected to the system connector.

The accessory audio mode is automatically enabled/disabled during connection/disconnection of dedicated

phone accessories.

RM-198

System Module Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 8 –15