AD1885

–13–

REV. 0

Headphones Volume Registers (Index 04h)

g

e

Rg

e

R g

e

R g

e

Rg

e

R

m

u

Nm

u

N m

u

N m

u

Nm

u

N

e

m

a

Ne

m

a

N

e

m

a

N

e

m

a

Ne

m

a

N5

1

D5

1

D 5

1

D 5

1

D5

1

D4

1

D4

1

D 4

1

D 4

1

D4

1

D3

1

D3

1

D 3

1

D 3

1

D3

1

D2

1

D2

1

D 2

1

D 2

1

D2

1

D1

1

D1

1

D 1

1

D 1

1

D1

1

D0

1

D0

1

D 0

1

D 0

1

D0

1

D9

D9

D9

D9

D9

D8

D8

D8

D8

D8

D7

D7

D7

D7

D7

D6

D6

D6

D6

D6

D5

D5

D5

D5

D5

D4

D4

D4

D4

D4

D3

D3

D3

D3

D3

D2

D2

D2

D2

D2

D1

D1

D1

D1

D1

D0

D0

D0

D0

D0

Dt

l

u

a

f

e

Dt

l

u

a

f

e

D

t

l

u

a

f

e

D

t

l

u

a

f

e

Dt

l

u

a

f

e

D

h

4

0h

4

0 h

4

0 h

4

0h

4

0e

m

u

l

o

V

s

e

n

o

h

p

d

a

e

He

m

u

l

o

V

s

e

n

o

h

p

d

a

e

H

e

m

u

l

o

V

s

e

n

o

h

p

d

a

e

H

e

m

u

l

o

V

s

e

n

o

h

p

d

a

e

He

m

u

l

o

V

s

e

n

o

h

p

d

a

e

HM

P

HM

P

H M

P

H M

P

HM

P

HX

X

X

X

X5

V

H

L5

V

H

L

5

V

H

L

5

V

H

L5

V

H

L4

V

H

L4

V

H

L

4

V

H

L

4

V

H

L4

V

H

L3

V

H

L3

V

H

L

3

V

H

L

3

V

H

L3

V

H

L2

V

H

L2

V

H

L

2

V

H

L

2

V

H

L2

V

H

L1

V

H

L1

V

H

L

1

V

H

L

1

V

H

L1

V

H

L0

V

H

L0

V

H

L

0

V

H

L

0

V

H

L0

V

H

LX

X

X

X

XX

X

X

X

X5

V

H

R5

V

H

R

5

V

H

R

5

V

H

R5

V

H

R4

V

H

R4

V

H

R

4

V

H

R

4

V

H

R4

V

H

R3

V

H

R3

V

H

R

3

V

H

R

3

V

H

R3

V

H

R2

V

H

R2

V

H

R

2

V

H

R

2

V

H

R2

V

H

R1

V

H

R1

V

H

R

1

V

H

R

1

V

H

R1

V

H

R0

V

H

R0

V

H

R

0

V

H

R

0

V

H

R0

V

H

Rh

0

0

0

8h

0

0

0

8

h

0

0

0

8

h

0

0

0

8h

0

0

0

8

RHV[5:0]

Right Headphone Volume Control. The least significant bit represents 1.5 dB. This register controls the out-

put from +6 dB to a maximum attenuation of –88.5 dB.

LHV[5:0]

Left Headphone Volume Control. The least significant bit represents 1.5 dB. This register controls the output

from +6 dB to a maximum attenuation of –88.5 dB.

HPM

Headphone Volume Mute. When this bit is set to “1,” the channel is muted.

HPM

xHV5 . . . xHV0

Function

0

00 0000

6 dB Gain

0

01 1111

–40.5 dB Attenuation

0

11 1111

–88.5 dB Attenuation

1

xx xxxx

–

∞ dB Attenuation

Master Volume Mono (Index 06h)

g

e

Rg

e

R g

e

R g

e

Rg

e

R

m

u

Nm

u

N m

u

N m

u

Nm

u

N

e

m

a

Ne

m

a

N

e

m

a

N

e

m

a

Ne

m

a

N5

1

D5

1

D 5

1

D 5

1

D5

1

D4

1

D4

1

D 4

1

D 4

1

D4

1

D3

1

D3

1

D 3

1

D 3

1

D3

1

D2

1

D2

1

D 2

1

D 2

1

D2

1

D1

1

D1

1

D 1

1

D 1

1

D1

1

D0

1

D0

1

D 0

1

D 0

1

D0

1

D9

D9

D9

D9

D9

D8

D8

D8

D8

D8

D7

D7

D7

D7

D7

D6

D6

D6

D6

D6

D5

D5

D5

D5

D5

D4

D4

D4

D4

D4

D3

D3

D3

D3

D3

D2

D2

D2

D2

D2

D1

D1

D1

D1

D1

D0

D0

D0

D0

D0

Dt

l

u

a

f

e

Dt

l

u

a

f

e

D

t

l

u

a

f

e

D

t

l

u

a

f

e

Dt

l

u

a

f

e

D

h

6

0h

6

0 h

6

0 h

6

0h

6

0

e

m

u

l

o

V

r

e

t

s

a

Me

m

u

l

o

V

r

e

t

s

a

M

e

m

u

l

o

V

r

e

t

s

a

M

e

m

u

l

o

V

r

e

t

s

a

Me

m

u

l

o

V

r

e

t

s

a

M

o

n

o

Mo

n

o

M

o

n

o

M

o

n

o

Mo

n

o

M

M

M

MM

M

M

M

M

M

M

M

MM

M

MX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

X4

V

M

M4

V

M

M

4

V

M

M

4

V

M

M4

V

M

M3

V

M

M3

V

M

M

3

V

M

M

3

V

M

M3

V

M

M2

V

M

M2

V

M

M

2

V

M

M

2

V

M

M2

V

M

M1

V

M

M1

V

M

M

1

V

M

M

1

V

M

M1

V

M

M0

V

M

M0

V

M

M

0

V

M

M

0

V

M

M0

V

M

Mh

0

0

0

8h

0

0

0

8

h

0

0

0

8

h

0

0

0

8h

0

0

0

8

MMV[4:0]

Mono Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from

0 dB to a maximum attenuation of 46.5 dB.

MMM

Mono Master Volume Mute. When this bit is set to “1,” the channel is muted.

PC Beep Register (Index 0Ah)

g

e

Rg

e

R g

e

R g

e

Rg

e

R

m

u

Nm

u

N m

u

N m

u

Nm

u

N

e

m

a

Ne

m

a

N

e

m

a

N

e

m

a

Ne

m

a

N5

1

D5

1

D 5

1

D 5

1

D5

1

D4

1

D4

1

D 4

1

D 4

1

D4

1

D3

1

D3

1

D 3

1

D 3

1

D3

1

D2

1

D2

1

D 2

1

D 2

1

D2

1

D1

1

D1

1

D 1

1

D 1

1

D1

1

D0

1

D0

1

D 0

1

D 0

1

D0

1

D9

D9

D9

D9

D9

D8

D8

D8

D8

D8

D7

D7

D7

D7

D7

D6

D6

D6

D6

D6

D5

D5

D5

D5

D5

D4

D4

D4

D4

D4

D3

D3

D3

D3

D3

D2

D2

D2

D2

D2

D1

D1

D1

D1

D1

D0

D0

D0

D0

D0

Dt

l

u

a

f

e

Dt

l

u

a

f

e

D

t

l

u

a

f

e

D

t

l

u

a

f

e

Dt

l

u

a

f

e

D

h

A

0h

A

0 h

A

0 h

A

0h

A

0e

m

u

l

o

V

P

E

E

B

_

C

Pe

m

u

l

o

V

P

E

E

B

_

C

P

e

m

u

l

o

V

P

E

E

B

_

C

P

e

m

u

l

o

V

P

E

E

B

_

C

Pe

m

u

l

o

V

P

E

E

B

_

C

PM

C

PM

C

P M

C

P M

C

PM

C

PX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

XX

X

X

X

X3

V

C

P3

V

C

P

3

V

C

P

3

V

C

P3

V

C

P2

V

C

P2

V

C

P

2

V

C

P

2

V

C

P2

V

C

P1

V

C

P1

V

C

P

1

V

C

P

1

V

C

P1

V

C

P0

V

C

P0

V

C

P

0

V

C

P

0

V

C

P0

V

C

PX

X

X

X

Xh

0

0

0

8h

0

0

0

8

h

0

0

0

8

h

0

0

0

8h

0

0

0

8

PCV[3:0]

PC Beep Volume Control. The least significant bit represents 3 dB attenuation. This register controls the output

from 0 dB to a maximum attenuation of –45 dB. The PC Beep is routed to Left and Right Line outputs even when

AD1885 is in a

RESET state. This is so that Power-On Self-Test (POST) codes can be heard by the user in case

of a hardware problem with the PC.

PCM

PC Beep Mute. When this bit is set to “1,” the channel is muted.

PCM

PCV3 . . . PCV0

Function

0

0000

0 dB Attenuation

0

1111

–45 dB Attenuation

1

xxxx

∞ dB Attenuation