Internal Microphone; External Microphone - Nokia n81 Service Manual

RM-179; RM-223
System Module and User Interface

Internal microphone

Internal microphone is used for Handportable (HP) and Internal Handsfree (IHF) call modes.
A digital MEMS-microphone is connected directly to Rapido via Data (MicData on Genio42) and CLK (AudioCLK).
Mic is powered by VSIM2.
Figure 73 Internal microphone circuitry

External microphone

Headsets provide external analog microphone via AV connector.
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