ADAV4601BSTZ datasheet(44/60 Pages) AD

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ADAV4601

Rev. B | Page 44 of 60

Address 0x011E and Address 0x011F Headphone 1/AUXOUT4 Volume Control Registers (Default: 0x0080, 0x0000)

These two registers control the volume for the headphone and AUXOUT4 outputs.

The volume control words are 28-bit words in twos complement and a 5.23 format. This means there are five bits to the left of the decimal

point of which the most significant bit is the sign bit.

Table 37.

Bit No.

Bit Name

Description

Default

Bits[15:12]

Reserved

Always write as 0 if writing to this register.

0000

Bits[11:0]

Headphone 1 volume control[27:0]

0x011E Bits[11:0] = Headphone 1/AUXOUT 4 volume

Bits[27:16]

000010000000

Bits[15:0]

Headphone 1 volume control[27:0]

0x011F Bits[15:0] = Headphone 1/AUXOUT 4 volume

Bits[15:0]

0000000000000000

Address 0x0120 Headphone 1/AUXOUT4 Channel Loudness Register (Default: 0x0000)

Table 38.

Bit No.

Bit Name

Description

Default

Bits[15:7]

Reserved

Always write as 0 if writing to this register.

000000000

Bits[6:5]

Cutoff frequency

These register bits are used to control the cutoff frequency of the loudness.

00b = 10 Hz

01b = 30 Hz

10b = 50 Hz

11b = 70 Hz

Bits[4:0]

Loudness level

These register bits are used to control the required level of loudness. It can be

changed in 1 dB steps.

00000

0x00 = 0 dB

0x01 = 1 dB

…

0x0E = 14 dB

0x0F = 15 dB

Address 0x0121 Mute Control Register (Default: 0x0000)

Table 39.

Bit No.

Bit Name

Description

Default

Bits[15:8]

Reserved

Always write as 0 if writing to this register.

00000000

Bit[7]

Mute tweeter output

Mutes the tweeter output.

0b = mutes

1b = unmutes

Bit[6]

Mute woofer output

Mutes the woofer output.

0b = mutes

1b = unmutes

Bit[5]

Mute AUXOUT3 output

Mutes the AUXOUT3 output.

0b = mutes

1b = unmutes

Bit[4]

Mute HP1/AUXOUT4 output

Mutes the Headphone 1 and AUXOUT4 output.

0b = mutes

1b = unmutes

Bit[3]

Mute SDO0 output

Mutes the SDO0 output.

0b = mutes

1b = unmutes

Bit[2]

Mute SPDIF output

Mutes the SPDIF output.

0b = mutes

1b = unmutes

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