ASAHI KASEI

[AK4393]

M0039-E-01

2000/5

- 11 -

n Audio Serial Interface Format

Data is shifted in via the SDATA pin using BICK and LRCK inputs. Five data formats are supported and selected by the

DIF0-2 as shown in Table 5. In all formats the serial data is MSB-first, 2's compliment format and is latched on the rising

edge of BICK. Mode 2 can be used for 20 and 16 MSB justified formats by zeroing the unused LSBs.

Mode

DIF2

DIF1

DIF0

Mode

BICK

Figure

0

0

0

0

0: 16bit LSB Justified

³32fs

Figure 1

1

0

0

1

1: 20bit LSB Justified

³40fs

Figure 2

2

0

1

0

2: 24bit MSB Justified

³48fs

Figure 3

30

1

1

3: I

³48fs

Figure 4

4

1

0

0

4: 24bit LSB Justified

³48fs

Figure 2

Table 5. Audio Data Formats

SDATA

BICK

LRCK

SDATA

15

14

6

5

4

BICK

0

1

10

11

12

13

14

15

0

1

10

11

12

13

14

15

0

1

321

0

15

14

(32fs)

(64fs)

014

1

15

16

17

31

0

1

14

15

16

17

31

0

1

15

14

0

15

14

0

Mode 0

Don’t care

Don’t care

15:MSB, 0:LSB

Mode 0

15

14

6

5

4

3

2

1

0

Lch Data

Rch Data

Figure 1. Mode 0 Timing

SDATA

LRCK

BICK

(64fs)

09

1

10

11

12

31

0

1

9

10

11

12

31

0

1

19

0

19

0

Mode 1

Don’t care

Don’t care

19:MSB, 0:LSB

SDATA

Mode 4

23:MSB, 0:LSB

20

19

0

20

19

0

Don’t care

Don’t care

22

21

22

21

Lch Data

Rch Data

8

23

23

8

Figure 2. Mode 1,4 Timing