User Guide

CCS Technical Documentation 7 - System Module & UI
Company Confidential NMM-3
Issue 1 (11/2003) Copyright  2003 Nokia Corporation Page 7-23
Company Confidential
External Microphone connection:
External Earphone Connections
The external earphone output has stereo fully differential lines are connected to UEME
HF outputs HF, HFCM, HFR and HFCMR.
The external audio is processed by the Audio Receive Path in UEME, and controlled by
TIKU. UEME performs the following functions:
• Digital to analog conversion of EAR DATA, and low pass filtering (common to all
Rx audio)
• Programmable attenuating stage
• Stereo HF and HFCM drivers
External Earphone connections:
Internal Audio
IHF Speaker
The Integrated Hands Free Speaker is used to generate speech audio, alerting and warn-
ing tones. The speaker capsule is mounted in the C-cover. Spring contacts are used to
connect the IHF speaker to the Engine PWB. The IHF speaker is driven directly from UEME
that incorporates the audio power amplifier and a programmable attenuation stage.
XMICP
XMICN
HOOKINT
MICB2
UEME
D200
MIC2P
MIC2N
EMC / ESD
Components
R415
System
Connector
Pop-Port
HFCM
HF
UEME
D200
HFCMR
HFR
EMC / ESD
Components
System Connector
Pop-Port
XEARN
XEARP
XEARN
R
XEARP
R