AD1986ABSTZ datasheet(35/56 Pages) AD

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AD1986A

Rev. 0 | Page 35 of 56

C/LFE DAC VOLUME (REGISTER 0x36)

This register controls the CENTER/LFE DAC gain and mute to the output selector section. The volume register contains five bits,

generating 32 volume steps of −1.5 dB each for a range of +12.0 dB to −34.5 dB.

Note that the left/right association of the center and LFE channels can be swapped at the codec outputs by setting the CSWP bit in

Reg

Name

D15

D14

D13

D12

D11

D10

Default

0x36

C/LFE

DAC

Volume

LFEM

LFE4

LFE3

LFE2

LFE1

LFE0

CNTM

CNT4

CNT3

CNT2

CNT1

CNT0

0x8888

Table 96.

Function

Controls the gain of the center channel to the output selector section from +12.0 dB to −34.5 dB. The least significant

bit represents −1.5 dB.

CNTM

CNT [4:0]

Function

Default

0 0000

+12 dB gain

0 1000

0 dB attenuation

Default

1 1111

−34.5 dB attenuation

CNT [4:0]

(Center Volume)

x xxxx

Muted

CNTM

(Center Mute)

Mutes the center channel.

Default: muted (0x1)

Controls the gain of the LFE channel to the output selector section from +12.0 dB to −34.5 dB. The least significant bit

represents −1.5 dB.

LFEM

LFE[4:0]

Function

0 0000

+12 dB gain

0 1000

0 dB attenuation

Default

1 1111

−34.5 dB attenuation

LFE [4:0]

(LFE Volume)

x xxxx

Muted

LFEM

(LFE Mute)

Mutes the LFE channel.

Default: muted (0x1)

Reserved.

Default: 0

SURROUND DAC VOLUME (REGISTER 0x38)

This register controls the surround DAC gain and mute to the output selector section. The volume register contains five bits, generating

32 volume steps of −1.5 dB each for a range of +12.0 dB to −34.5 dB.

Reg

Name

D15

D14

D13

D12

D11

D10

Default

0x18

Surround

DAC

Volume

LV4

LV3

LV2

LV1

LV0

RV4

RV3

RV2

RV1

RV0

0x8888

Table 97.

Function

Controls the left/right channel gains of this input to the output selector section from +12 dB to -34.5 dB. The least

significant bit represents −1.5 dB.

L/RM

L/RV [4:0]

Function

Default

0 0000

+12 dB gain

0 1000

0 dB

Default

1 1111

−34.5 dB attenuation

L/RV [4:0]

(Left/Right

Volume)

x xxxx

Muted

L/RM

(Left/Right

Mute)

Mutes the left/right channels independently.

Default: muted (0x1)

Reserved.

Default: 0

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