DS4201

20 of 24

102099

EXTENSION UNIT CONTROL SELECTOR

CONTROL SELECTOR

VALUE

OUTPUT_DOUBLE_CONTROL

0x00

APPENDIX B: PCM DATA FORMATS

The DS4201 supports four linear PCM data formats: 16–bit signed stereo, 16–bit signed mono, 8–bit

unsigned stereo, and 8–bit unsigned mono. Data for-mats for these four PCM types are shown in Figure

8–11. Coding for PCM 8 and 16 bit formats are shown in Figure 12. As shown in Figure 12, the 16–bit

signed format, also know as 2’s complement, uses the value -32768 (0x8000) to represent maximum

negative amplitude and 32767 (0x7FFF) to represent maximum positive. The 8–bit unsigned format uses

the value 0 (0x00) to represent maximum negative and 255 (0xFF) for maximum positive.

SIGNED 16–BIT STEREO DATA FORMAT Figure 8

? Time

. . .

SAMPLE 3

SAMPLE 2

SAMPLE 1

. . .

RIGHT

DATA

LEFT

DATA

RIGHT

DATA

LEFT

DATA

RIGHT

DATA

LEFT

DATA

. . .

31

16

15

0

31

16

15

0

31

16

15

0

(BIT

POSN)

SIGNED 16–BIT MONO DATA FORMAT Figure 9

? Time

. . .

SAMPLE 3

SAMPLE 2

SAMPLE 1

. . .

MONO DATA

MONO DATA

MONO DATA

. . .

15

0

15

0

15

0

(BIT POSN)

UNSIGNED 8–BIT STEREO DATA FORMAT Figure 10

? Time

. . .

SAMPLE 3

SAMPLE 2

SAMPLE 1

. . .

RIGHT

DATA

LEFT

DATA

RIGHT

DATA

LEFT

DATA

RIGHT

DATA

LEFT

DATA

. . .

15

8

7

0

15

8

7

0

15

8

7

0

(BIT

POSN)

UNSIGNED 8–BIT MONO DATA FORMAT Figure 11

? Time

. . .

SAMPLE 3

SAMPLE 2

SAMPLE 1

. . .

MONO DATA

MONO DATA

MONO DATA

. . .

7

0

7

0

7

0

(BIT POSN)