VV6501 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VV6501

VGA CMOS Color Image Sensor

STMicroelectronics 

Functional Description

VV6501

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.

Figure 17: VV6501 audio amplifier overview

Power management

AUD3V3

Digital block

AUDGAIN[2:0]

pdaudref

Audio amplifier

Audio

+

x1

x1

Bandgap -

+

-

AUDOUTP

-

+

AUDOUTN

AUDREF MICBIAS

micro

MICIN

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.

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

22/60

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