MOSA

MS6258

Gain And Attenuation Volume Controller IC

REV 1

8

www.mosanalog.com.tw

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

Gain / Attenuation value (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. Where Ax=-1dB/step, Bx=-10dB/step, Cx=+1dB/step

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

3. The initial condition is set to be maximum attenuation –79dB and mute on mode when the power on.