VV6501 datasheet(22/60 Pages) STMICROELECTRONICS

22 / 60 page

Functional Description

VV6501

22/60

3.2

Audio block

The audio amplifier is designed to drive an external ADC, possibly in the co-processor, with an

amplified audio signal taken from a FET microphone input. The 3-bit gain control and power down

for the reference are controlled via the I2C interface.

3.2.1

Co-processor support for audio

Table 8 below summarizes the audio capability of the different co-processors the VV6501 is

intended to work with.

Figure 17: VV6501 audio amplifier overview

Table 8: Co-processor support for audio

Co-processor

Audio support

Comment

STV0676

Audio 8-b digital endpoint

External ADC needed

STV0674

16 bit Sigma-Delta

501 audio output is directly AC coupled to STV0674

differential audio inputs.

STV0674 includes digital ALC and noise gate

STV0680/1

Successive approximation ADC

Low quality audio recording support

micro

Audio

Bandgap

AUDREF

MICIN

AUDGAIN[2:0]

AUDOUTP

AUDOUTN

MICBIAS

pdaudref

Digital block

AUD3V3

Power management

Audio amplifier

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