DF1706

7

SBAS182

FIGURE 4. Audio Data Input Formats.

1

2

15

1/f

S

Lch

Rch

MSB

LSB

16

LRCIN

BCKIN

AUDIO DATA WORD = 16-BIT

D

IN

1

2

15

MSB

LSB

16

2

1

2

1

1

2

23

MSB

LSB

24

AUDIO DATA WORD = 24-BIT

D

IN

1

2

23

MSB

LSB

24

14

15

16

1

2

15

1/f

S

Lch

Rch

MSB

LSB

16

LRCIN

BCKIN

AUDIO DATA WORD = 16-BIT

(a) Standard Data Format; L-Channel = HIGH, R-Channel = LOW

D

IN

1

2

15

16

18

19

22

23

20

1

2

19

MSB

LSB

20

AUDIO DATA WORD = 20-BIT

D

IN

1

2

19

20

24

1

2

23

MSB

LSB

24

AUDIO DATA WORD = 24-BIT

D

IN

1

2

23

MSB

LSB

24

AUDIO INPUT INTERFACE

The audio input interface is comprised of BCKIN (pin 2),

LRCIN (pin 28), and DIN (pin 1). BCKIN is the input bit

into the DF1706 on the rising edge of BCKIN. The left/right

clock, LRCIN, is used as a word latch for the audio input

4 (a) through (c) show the input data formats, which are sel-

ected by hardware or software controls.

See Figure 5 for the audio input interface timing requirements.

FIGURE 3. External Forces Reset Timing.

1024 system clocks

Reset

Reset Removal

System Clock

Internal Reset

External Reset

1

2

3

22

23

1/f

S

Lch

Rch

MSB

LSB

24

LRCIN

BCKIN

AUDIO DATA WORD = 24-BIT

D

IN

1

2

3

1

2

3

22

23

MSB

LSB

24

(b) Left-Justified Format; L-Channel = HIGH, R-Channel = LOW