AD1835AS datasheet(20/23 Pages) AD

20 / 23 page

REV. PrA

PRELIMINARY TECHNICAL DATA

AD1835

–20–

Table VII. ADC Peak

FUNCTION

Four Fixed

Address

R/W RES Six Data Bits

Bits

15, 14, 13, 12

9, 8, 7, 6, 5, 4

3, 2, 1, 0

0010 = Left ADC

000000 = 0.0 dBFS

0000

1011 = Right ADC

000001 = –1.0 dBFS

000010 = –2.0 dBFS These

four bits

are always

zero

111111 = –63.0 dBFS

Table VIII. ADC Control I

FUNCTION

ADC

Sample

Address

RES

Dither

Filter

Power-Down

Rate

Reserved

15, 14, 13, 12

5, 4, 3, 2, 1, 0

1100

0 = Disabled

0 = All Pass

0 = Normal

0 = 48 kHz

0, 0, 0, 0, 0, 0

1 = Enabled

1 = High-Pass

1 = Power-Down

1 = 96 kHz

0, 0, 0, 0, 0, 0

Table IX. ADC Control II

FUNCTION

Master/Slave

ADC

ADC Data-

ADC MUTE

Address

RES

Aux Mode

Data Format

Word Width

Reserved

Right

Left

15, 14, 13, 12

8, 7, 6

5, 4

3, 2

1101

0 = Slave

000 = I2S

00 = 24 Bits

0, 0

0 = On

1 = Master

001 = RJ

01 = 20 Bits

1 = Mute

010 = DSP

10 = 16 Bits

011 = LJ

11 = Reserved

100 = Packed 256

101 = Reserved

110 = Auxiliary 256

111 = Auxiliary 512

Table X. ADC Control III

FUNCTION

IMCLK

ADC

DAC

ADC

Address

RES RES Reserved

Clocking Scaling

Peak Readback

Test Mode

15, 14, 13, 12 11

9, 8

7, 6

4, 3, 2

1, 0

1110

0, 0

00 = MCLK

20 = Disabled Peak Readback 000 = Normal Mode 00 = Normal Mode

01 = MCLK

1 = Enabled Peak Readback

All others reserved

10 = MCLK

2/3

11 = MCLK

Table VI. DAC Volume Control

FUNCTION

Address

RES

DAC Volume

15, 14, 13, 12

9, 8, 7, 6, 5, 4, 3, 2, 1, 0

0010 = DACL1

0000000000 = 1/1024

0011 = DACR1

0000000001 = 2/1024

0100 = DACL2

0000000010 = 3/1024

0101 = DACR2

1111111110 = 1022/1024

0110 = DACL3

1111111111 = 1023/1024

0111 = DACR3

1000 = DACL4

1001 = DACR4

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