Internal Speakers - Nokia RX-44 Service Manual

RX-44
System Module
Figure 43 Audio concept
The D4800 is the heart of the device's audio system handling digital signal processing and controlling of
audio related peripherals chips.
The audio HW codec handling ADC and DAC tasks and analog signal amplifications is referred as N4100. The
N4100 is also interface against the device's internal digital microphone module B4130.

Internal speakers

The D4800 feeds digital audio data to the N4100 via the I2S interface. After the N4100 the signal is further
amplified by stereo audio power amplifier (N4101) and fed to the dynamic speakers (B4140 and B4141).
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