MOSA

MS6258

Gain And Attenuation Volume Controller IC

REV 6

9

www.mosanalog.com

Data bytes description

Function bits

MSB

LSB

Function

1

1

1

1

1

1

1

1

Function off (-79dB)

1

1

0

1

A3

A2

A1

A0

2-channel, -1dB/step

1

1

1

0

0

B2

B1

B0

2-channel, -10dB/step

1

0

1

0

A3

A2

A1

A0

Left channel, -1dB/step

1

0

1

1

0

B2

B1

B0

Left channel, -10dB/step

0

0

1

0

A3

A2

A1

A0

Right channel, -1dB/step

0

0

1

1

0

B2

B1

B0

Right channel, -10dB/step

1

1

0

0

C3

C2

C1

C0

2-channel, +1dB/step

0

1

1

0

C3

C2

C1

C0

Left channel, +1dB/step

0

1

0

1

C3

C2

C1

C0

Right channel, +1dB/step

0

0

0

0

Stereo1

0

0

0

1

Stereo2

0

0

1

0

Stereo3

0

1

0

0

0

0

1

1

Stereo4

0

0

0

1

Power off preparation (pop noise free)

1

0

0

1

2-channel, mute On

0

1

1

1

1

0

0

0

2-channel, mute Off

Gain / Attenuation bits

A3

A2

A1

A0

Attenuation (dB)

Gain (dB)

-

B2

B1

B0

C3

C2

C1

C0

A

B

C

0

0

0

0

0

0

0

0

0

0

1

-1

-10

+1

0

0

1

0

-2

-20

+2

0

0

1

1

-3

-30

+3

0

1

0

0

-4

-40

+4

0

1

0

1

-5

-50

+5

0

1

1

0

-6

-60

+6

0

1

1

1

-7

-70

+7

1

0

0

0

-8

-

+8

1

0

0

1

-9

-

+9

1

0

1

0

-

-

+10

1

0

1

1

-

-

+11

1

1

0

0

-

-

+12

1

1

0

1

-

-

+13

1

1

1

0

-

-

+14

1

1

1

1

-

-

+15

1. Attenuation bit, Ax = -1dB/step, Bx = -10dB/step

2. Gain bit, Cx = +1dB/step

3. Total gain / attenuation equal Ax + Bx + Cx.

4. The function of power off preparation is to prevent pop noise when power off.