WM8581 datasheet(39/100 Pages) WOLFSON

39 / 100 page

Production Data

WM8581

PD Rev 4.0 April 2007

DE-EMPHASIS MODE

A digital de-emphasis filter may be applied to each DAC channel. The de-emphasis filter for each

stereo channel is enabled under the control of DEEMP[3:0]. DEEMP[0] enables the de-emphasis

filter for DAC 1, DEEMP[1] enables the de-emphasis filter for DAC 2, DEEMP[2] enables the de-

emphasis filter for DAC 3 and DEEMP[3] enables the de-emphasis filter for DAC 4.

BIT

LABEL

DEFAULT

DESCRIPTION

3:0

DEEMP[3:0]

0000

De-emphasis mode select:

DEEMP[0] = 1, enable De-

emphasis on DAC1.

DEEMP[1] = 1, enable De-

emphasis on DAC2.

DEEMP[2] = 1, enable De-

emphasis on DAC3.

DEEMP[3] = 1, enable De-

emphasis on DAC4.

R17

DAC CONTROL 3

11h

DEEMPALL

0 = De-emphasis controlled by

DEEMP[3:0]

1 = De-emphasis enabled on all

DACs

Table 27 De-emphasis Register

Refer to, Figure 41, Figure 42, Figure 43 and Figure 44 for details of the De-Emphasis modes at

different sample rates.

DAC OUTPUT PHASE

The DAC Phase control word determines whether the output of each DAC is non-inverted or inverted

BIT

LABEL

DEFAULT

DESCRIPTION

R18

DAC CONTROL 4

12h

7:0

PHASE

[7:0]

11111111

Controls phase of DAC outputs

0 = inverted

1 = non-inverted

PHASE[0] = 0 inverts phase of

DAC1L output

PHASE[1] = 0 inverts phase of

DAC1R output

PHASE[2] = 0 inverts phase of

DAC2L output

PHASE[3] = 0 inverts phase of

DAC2R output

PHASE[4] = 0 inverts phase of

DAC3L output

PHASE[5] = 0 inverts phase of

DAC3R output

PHASE[6] = 0 inverts phase of

DAC4L output

PHASE[7] = 0 inverts phase of

DAC4R output

Table 28 DAC Output Phase Register

WM8581 bảng dữ liệu(PDF) 39 Page - Wolfson Microelectronics plc

WM8581 bảng dữ liệu(HTML) 39 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

bảng dữ liệu tải về

Link URL