Internal Microphone; External Earpiece And Microphone - Nokia 500 Service Manual

RM-750
System Module
Figure 35 Internal handsfree (IHF) speaker diagram

Internal microphone

The digital microphone used is McCoy and it is connected to Rapu. DigiMic CLK is connected to Rapu Genio72
and DigiMic DATA is connected to Rapu Genio39.
Figure 36 Internal microphone diagram

External earpiece and microphone

The AV headset earpiece is connected to TPA6140 audio amplifier which is used for high quality audio output
and to guarantee long playback time for accessory use. TPA6140 is connected to Gazoo/Pearl XEarL, XEarLC,
XEarR, XEarRC lines for audio and is controlled via I2C_2 bus by RAPU.
The AV headset microphone line is connected to EM ASIC Gazoo/Pearl Mic2 line via AV switch N2037.
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