User Guide

NEM-2
System Module and User Interface CCS Technical Documentation
Page 48 Copyright Nokia. All rights reserved. Issue 1 07/03
External Accessory Regulator
An external LDO Regulator exists for accessory power supply purposes. All ACI-accesso-
ries require this power supply. Regulator input is connected to battery voltage VBAT and
output is connected to Vout pin in the system connector. Regulator is controlled via UPP
(On/Off-function).
Accessory Regulator Signals
Acoustics
The following chapters give a description of acoustical parts.
Earpiece
Used earpiece is a standard part, NMP code 5140067. Its’ features include impedance
32 ohm, sensitivity 103dB+-3dB dB, SPL/1Vrms input 1kHz.
.
Figure 12: Earpiece view from top
Signal Min. Nom Max Note
Vout 2.70V 2.78 2.86V I
max
= 150mA
GenIO(0) 1.4 1.8 1.88
0.6
High (ON)
Low (OFF)