Internal Microphone; Internal Earpiece - Nokia RM-555 Service Manual

RM-555
System Module and User Interface
Figure 81 Audio system block

Internal microphone

The internal microphone is used for HandPortable (HP) and Internal HandsFree (IHF) call modes. A digital
microphone data and clock line are connected to Rapidoyawe and operating voltage is received from Avilma.
Figure 82 Internal microphone

Internal earpiece

Internal earpiece is used for the HandPortable (HP) call mode. A dynamic 5x10 mm earpiece capsule is
Connected to Avilma ASIC's differential output EarP and EarN.
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