MOSA

MS6821

4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control

REV 3

20/29

www.mosanalog.com

I

Input selector and input gain

Set left channel to be line-4 and input gain to be 3dB. Set right channel to be line-4 and input gain to be 3dB.

ACK

Start

MS6821 Address

ACK

100

0

11

01

L-ch = Line4, G = 3dB

ACK

R-ch = Line4, G = 3dB

1

0

10

11

01

Stop

Gain

Line

The left and right input channel are independent.

Volume control

Set left channel to be -15dB and right channel to be 30dB.

ACK

Start

MS6821 Address

ACK

100

0

11

01

L-ch = Line4, G = 3dB

ACK

R-ch = Line4, G = 3dB

1

0

10

11

01

Stop

Gain

Line

Power down mode

Set built-in DAC to be power down mode.

ACK

Start

MS6821 Address

ACK

1

1

0

1

0

0

00

DAC power down

Stop

DACPD

Output mode, mixer control and audio format

Set output mode to be SE mode, audio format is I2S, and both input channel to be mixed.

ACK

Start

MS6821 Address

ACK

11

11

0

1

11

SE mode, All mix, I2S

Stop

Output mode

Audio format

Mixer