MOSA

MS6266

6-Channel Electronic Volume Controller

REV 2

9/13

www.mosanalog.com

Examples

Mute off

The initial condition is –79dB and mute on when power on. The first command must disable the mute function.

Data byte

MSB

ACK

Start

1

111

00

10

MS6266 Address

6 channels, Mute off

LSB

Stop

ACK

80H, 84H, 88H, 8CH

Set gain of 1

ACK

Start

MS6266 Address

ACK

1000

0

0

00

Ch 1, -10dB/step, 0dB

1001

00

00

ACK

Ch 1, -1dB/step, 0dB

Stop

Set attenuation of 5

ACK

Start

MS6266 Address

ACK

0110

0

0

00

Ch 5, -10dB/step, 0dB

0111

10

01

ACK

Ch 5, -1dB/step, -6dB

Stop

Set attenuation of 3

ACK

Start

MS6266 Address

ACK

0000

1

1

00

Ch 3, -10dB/step, -30dB

0001

11

00

ACK

Ch 3, -1dB/step, -3dB

Stop

Set gain of 3

ACK

Start

MS6266 Address

ACK

0000

0

1

10

Ch 3, +2dB/step, 4dB

0001

01

00

ACK

Ch 3, -1dB/step, -1dB

Stop

Odd gain 3dB = 2*2-1 = 2*(+2dB)+(-1dB)

Set power off preparation command to prevent pop noise before power is off.

ACK

Start

MS6266 Address

ACK

1

1

1

1

0

1

00

Power off preparation

Stop