Audio Concept; Audio Hw Architecture - Nokia N72 Service Manual

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Parameter Symbol
Host I/O VIO
supply
voltage1.8
V

Audio concept

Audio HW architecture

The functional core of the audio hardware is built around two ASICs: RAP CMT engine ASIC and the mixed-
signal ASIC.
The mixed-signal ASIC provides an interface for the transducers and the accessory connector. Because audio
amplifiers are also integrated into the ASIC, the only discrete electronics components needed 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 mixed-signal ASIC 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.
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COMPANY CONFIDENTIAL
Copyright © 2006 Nokia. All rights reserved.
unit note
V Nominal
1.8V
RM-180
System Module
Issue 1