MOSA

MS6257

GAIN AND ATTENUATION VOLUME CONTROLLER IC

REV 1

9

www.mosanalog.com.tw

Example

Mute off

Data byte

1

000

00

MSB

10

ACK

Start

0111

00

10

MS6257 address

2-ch, Mute off

LSB

Stop

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

Set gain of 2 channel at 0dB

ACK

Stop

11

00

00

00

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

ACK

Start

MS6257 Address

ACK

1110

00

00

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

110

1

0

0

00

ACK

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

Set gain of 2 channel at 6dB

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

ACK

Stop

11

00

10

01

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

ACK

Start

MS6257 Address

ACK

1110

00

00

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

110

1

0

0

00

ACK

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

Set gain of 2 channel at -3dB

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

ACK

Start

MS6257 Address

ACK

1100

00

00

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

111

0

0

0

00

ACK

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

ACK

Stop

11

01

11

00

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

Set attenuation of left channel at –33dB

ACK

Start

MS6257 Address

ACK

Stop

1011

1

1

00

L-ch, -10dB/step, -30dB

1010

11

00

ACK

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