VT1616 datasheet(1/40 Pages) ETC2

Part #	VT1616

Description	6-Channel AC97 Codec with S/PDIF

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Manufacturer	ETC2 [List of Unclassifed Manufacturers]

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VIA

Technologies

Incorporated

6-Channel AC97 Codec with S/PDIF

VT1616

Revision 1.5, October 11, 2002

1

Data Sheet

Features

• AC’97 2.2 compliant codec

• 20-bit, stereo ADC and6-channel stereo DACs

• 1 Hz resolution VSR on all channels

• IntegratedIEC958 line driver for S/PDIF output

• S/PDIF compressed digital or LPCM audio out

• Hardware downmix option to 2 channels

• ADC DC removal for removing recording white noise

• 4-bit 3D stereo expansion for simulatedsurround

• 4 stereo, 2 mono analog line-level inputs

• Secondline-level output with volume control

• External Audio Amplifier Control

• Low Power consumption mode

• Exceeds Microsoft® WHQL logo requirements

• 3.3V digital, 3.3 or 5V analog power supply

• 48-pin LQFP small footprint package

Description

VIA Technologies’ VT1616TM 20-bit

¦∆ audio

codec conforms to the AC’97 2.2 and S/PDIF

Output specifications.

The VT1616 integrates

Sample Rate Converters on all channels andcan be

adjusted in 1Hz increments. There is a provision in

hardware for down-mixing the 6 channels into

stereo when only two endpoints are available. The

analog

mixer

circuitry

integrates

a

stereo

enhancement to provide a pleasing 3D surround

sound effect for stereo media.

This codec is

designed with aggressive power management to

achieve low power consumption. When usedwith a

3.3V analog supply, power consumption is further

reduced. The primary applications for this part are

desktop

and

portable

personal

computers

multimedia subsystems. However, it is suitable for

any system requiring 6-channel audio output for

home theater systems at competitive prices.

Figure 1.Functional Block Diagram

SYNC

BIT_CLK

SDATA_OUT

SDATA_IN

RESET#

VOL

MUTE

VOL

MUTE

VOL

MUTE

VOL

MUTE

VOL

MUTE

VOL

MUTE

VOL

MUTE

VOL

DAC

VOL

MUTE

Σ

+20dB

Σ

MASTER

VOLUME

MONO

VOLUME

Σ

MASTER

INPUT

VOLUME

OSC

AC’97

Digital

Interface

VIDEO

AUX

MIC1

MIC2

PC_BEEP

PHONE

CD

LINE

XTL_IN

XTL_OUT

PCM IN

LINE_OUT

MONO_OUT

ADC

Σ

M

U

X

M

U

X

M

U

X

3D

VOLUME

/MUTE

SRC

CENTER

+LFE

PCM OUT

LNL/SR_OUT

SRC

LFE/CENTER

S/PDIF_OUT

DAC

SRC

VOL

MUTE

DAC

SRC

M

U

X

REAR

SURROUND

PCM OUT

FRONT PCM OUT

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