Parameter
Symbol
min
max
unit
note
Host I/O
supply
voltage1.8
V
VIO
1.71
1.89
V
Nominal
1.8V
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.
RM-180
Nokia Customer Care
System Module
Page 9 –28
COMPANY CONFIDENTIAL
Issue 1
Copyright © 2006 Nokia. All rights reserved.
