ADAV400_15 datasheet(30/36 Pages) AD

30 / 36 page

ADAV400

Rev. A | Page 30 of 36

Table 34. ADC Input Mux Control Register

Default = 0x0001

Function

15:4

Reserved (set to 0)

AIN4 to ADC

AIN3 to ADC

AIN2 to ADC

AIN1 to ADC

Table 35. Power Control Register

Default = 0x0000

Function1

PLL

Reference buffer

ADC

VOUT4 DAC

VOUT3 DAC

VOUT2 DAC

VOUT1 DAC

AUX2 right DAC

AUX2 left DAC

AUX1/HP right DAC

AUX1/HP left DAC

Headphone amplifier right

Headphone amplifier left

SRC

Digital ADC and DAC engine

Audio processor

1 0 = powered down, 1 = powered up.

Table 36. User Control Register 2

Default = 0x0000

Function

15:8

Reserved (set to 0)

Headphone amplifier mute

0 = normal operation

1 = mute

6:5

Reserved (set to 0)

4:0

Headphone amplifier attenuation

00000 = 0 dB

00001 = −1.5 dB

00010 = −3.0 dB

….

11110 = −45.0 dB

11111 = −46.5 dB

Table 37. User Control Register 1

Default Readback = 0x1E00

Function

15:13

Reserved (set to 0)

12:9

Reserved (set to 0)

These bits read back as 0b1111

SRC mux enable

0 = disabled

1 = enabled

SRC lock indicator (read only)

0 = SRC not locked

1 = SRC locked

MCLKO pin enable

0 = MCLKO pin disabled

1 = MCLKO pin enabled

5:3

MCLKO select

000 = reserved

001 = 1024 × fS (49.152 MHz)

010 = reserved

011 = reserved

1xx = 128 × fS (6.144 MHz)

2:1

PLL clock select

00 = 64 × fS (3.072 MHz)

01 = 128 × fS (6.144 MHz)

10 = 256 × fS (12.288 MHz)

11 = 512 × fS (24.576 MHz)

PLL enable

0 = PLL bypassed

1 = PLL in use

Table 38. DAC Amplifier Register

Default = 0x0000

Function

15:5

Reserved (set to 0)

DAC amplifier chopping1

0 = enabled

1 = disabled

3:0

Reserved (set to 0)

1 Set this bit to 1 to obtain maximum performance from the DAC amplifier.

Table 39. Headphone Amplifier Register

Default = 0x0000

Function

15:1

Reserved (set to 0)

Headphone amplifier chopping1

0 = enabled

1 = disabled

1 Set this bit to 1 to obtain maximum performance from the DAC amplifier.

ADAV400 Datasheet(PDF) 30 Page - Analog Devices

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