MOSA

MS6257

Gain and Attenuation Volume Controller IC

REV 6

9

www.mosanalog.com

Example

Mute off

Data byte

1

0

0

0

0

0

MSB

1

0

ACK

Start

0

1

1

1

0

0

1

0

MS6257 address

2-ch, Mute off

LSB

Stop

ACK

The initial condition is attenuation –79dB, gain 0dB and mute on when power up. The first command must disable the

mute function.

Set gain of two channels at 0dB

ACK

Stop

1

1

0

0

0

0

0

0

2-ch, +1dB/step, 0dB

ACK

Start

MS6257 Address

ACK

1

1

1

0

0

0

0

0

2-ch, -10dB/step, 0dB

1

1

0

1

0

0

0

0

ACK

2-ch, -1dB/step, 0dB

Set gain of two channels at 6dB

The value of attenuation must be set zero when the volume from attenuation to gain.

ACK

Stop

1

1

0

0

1

0

0

1

2-ch, +1dB/step, 6dB

ACK

Start

MS6257 Address

ACK

1

1

1

0

0

0

0

0

2-ch, -10dB/step, 0dB

1

1

0

1

0

0

0

0

ACK

2-ch, -1dB/step, 0dB

Set gain of two channels at -3dB

The value of gain must be set zero when the volume from gain to attenuation.

ACK

Start

MS6257 Address

ACK

1

1

0

0

0

0

0

0

2-ch, +1dB/step, 0dB

1

1

1

0

0

0

0

0

ACK

2-ch, -10dB/step, 0dB

ACK

Stop

1

1

0

1

1

1

0

0

2-ch, -1dB/step, -3dB