User Guide

NPE-4
3 - Audio System PAMS Technical Documentation
Page 3-2 ãNokia Corporation. Original
Table of Contents
Description Page No.
Introduction ......................................................................................................................................
4
Abbreviations .................................................................................................................................... 4
Technical overview .......................................................................................................................... 5
Block diagram ............................................................................................................................ 5
Parts list ...................................................................................................................................... 5
DC characteristics .................................................................................................................... 7
Audio function description ............................................................................................................ 7
Audio control ............................................................................................................................. 7
Gain table ................................................................................................................................... 8
Internal audio devices .................................................................................................................... 9
Earpiece ....................................................................................................................................... 9
Earpiece acoustic design ................................................................................................. 10
Earpiece electrical interface .......................................................................................... 12
Microphone ................................................................................................................................ 13
Sketch of microphone acoustic design ....................................................................... 14
Microphone electrical interface .................................................................................... 15
Buzzer .......................................................................................................................................... 16
Buzzer acoustic design .................................................................................................... 17
Buzzer electrical interface ............................................................................................. 18
Vibra specification ................................................................................................................... 19
Vibra electrical interface ................................................................................................. 19
External audio devices .................................................................................................................... 20
Audio accessories ..................................................................................................................... 20
External audio interface ......................................................................................................... 23
External audio interface - electrical interface ................................................................. 23
External audio connector ................................................................................................ 27
External audio signal electrical specification ........................................................... 28
Accessory detection, identification and control .............................................................. 30
Accessory detection .......................................................................................................... 30
Accessory identification .................................................................................................. 30
Accessory control .............................................................................................................31
List of Figures
Figure 1 Audio block diagram ................................................................................................. 5
Figure 2 Sketch of earpiece acoustic design ....................................................................... 10
Figure 3 Mechanical assembly of earpiece and vibra ....................................................... 11
Figure 4 Earpiece frequency response - ERP corrected - non DSP corrected ............ 11
Figure 5 DAI receiving frequency response, B4.0 .............................................................. 12
Figure 6 Internal earpiece electrical interface ................................................................... 12
Figure 7 Microphone acoustical design ............................................................................... 14
Figure 8 DAI sending frequency response, B4.0 ................................................................. 14
Figure 9 Internal microphone electrical interface ............................................................ 15