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4.1

Power Supply

The transient response of the regulator is important. If the power rails of the module are

supplied from an external voltage source, the transient response of any regulator used

should be 20 s or less.

4.2

Audio Interfaces

The Audio interface circuit consists of:

Stereo/dual-mono audio codec

Dual analogue audio inputs

Dual analogue audio outputs

6 digit MEMS microphone inputs

A configurable PCM,I2S or SPDIF interface

As below shows the functional blocks of the interface. The codec supports

stereo/dual-mono playback and recording of audio signals at multiple sample rates with a

16-bit resolution. The ADC and DAC of the codec each contain 2 independent

high-quality channels. Any ADC or DAC channel runs at its own independent sample rate.

The interface for the digital audio bus shares the same pins as the PCM codec interface

described in section as below which means each of the audio buses are mutually exclusive

in the usage. As below lists these alternative functions.

Figure 4

Figure 5