Audio Concept; Audio - Nokia RM-721 Service Manual

RM-721; RM-722
System Module
The CCP-bus (Compact Camera Port) is a unidirectional interface that is used to transfer the image data from
the camera to BB. It is a high speed differential interface. The camera is equipped with CCP class2 interface,
i.e. up to 650 Mbit/s. The device baseband supports CCP class0 (specified up to 208 MHz) but limits the
frequency to 160 MHz. So clock/data-signaling is used in the device.
Figure 31 Camera concept

Audio concept

Audio concept
The functional core of the audio hardware is built around two ASICs; Energy management ASIC N2200 and
digital ASIC D2800.
N2200 provides an interface for the transducers and the AV connector.
There are three audio transducers:
• one earpiece
• one IHF speaker
• one Clapton microphone
N2200 also provides an output for the vibra motor.
All external audio accessories are connected to the specific AV connector.
The following block diagram illustrates the audio interface of the phone:
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