WM8581 datasheet(23/94 Pages) WOLFSON

23 / 94 page

Product Preview

WM8581

PP Rev 1.0 March 2006

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

PAIFRX

PAIF Rx Master/Slave Mode Select:

0 = Slave Mode

1 = Master Mode

R10

PAIFTX

PAIF Tx Master/Slave Mode Select:

0 = Slave Mode

1 = Master Mode

R11

SAIFMS

SAIF Master/Slave Mode Select:

0 = Slave Mode

1 = Master Mode

Table 26 Master Mode Registers

The frequency of a master mode LRCLK is dependant on system clock and the RATE register control

bits. Table 27 shows the settings for common sample rates and system clock frequencies.

MCLK CLOCK FREQUENCY (MHZ)

128fs

192fs

256fs

384fs

512fs

768fs

1152fs

SAMPLING RATE

(LRCLK)

RATE =000

RATE =001

RATE =010

RATE =011

RATE =100

RATE =101

RATE =110

32kHz

4.096

6.144

8.192

12.288

16.384

24.576

36.864

44.1kHz

5.6448

8.467

11.2896

16.9340

22.5792

33.8688

Unavailable

48kHz

6.144

9.216

12.288

18.432

24.576

36.864

Unavailable

96kHz

12.288

18.432

24.576

36.864

Unavailable

192kHz

24.576

36.864

Unavailable

Table 12 Master Mode MCLK / LRCLK Frequency Selection

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

PAIF 1

09h

2:0

PAIFRX_RATE

[2:0]

010

R10

PAIF 2

0Ah

2:0

PAIFTX_RATE

[2:0]

010

R11

SAIF 1

0Bh

2:0

SAIF_RATE

[2:0]

010

Master Mode MCLK/LRCLK

Ratio:

000 = 128fs

001 = 192fs

010 = 256fs

011 = 384fs

100 = 512fs

101 = 768fs

110 = 1152fs

Table 13 Master Mode RATE Registers

In master mode, the BCLKSEL register controls the number of BCLKs per LRCLK. If the

MCLK:LRCLK ratio is 128fs or 192fs and BCLKSEL = 10, BCLKSEL is overwritten to be 128

BCLKs/LRCLK. Also, if BCLKSEL = 00, and LRCLK is 192fs or 1152fs, the generated BCLK has a

mark-space ratio of 1:2.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

PAIF 1

09h

4:3

PAIFRX_BCLKSEL

[1:0]

R10

PAIF 2

0Ah

4:3

PAIFTX_BCLKSEL

[1:0]

R11

SAIF 1

0Bh

4:3

SAIF_BCLKSEL

[1:0]

Master Mode BCLK Rate:

00 = 64 BCLKs/LRCLK

01 = 128 BCLKs/LRCLK

10 = 256 BCLKs/LRCLK

11 = BCLK = System Clock.

Table 14 Master Mode BCLK Control

WM8581 датащи(PDF) 23 Page - Wolfson Microelectronics plc

WM8581 датащи(HTML) 23 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

датащи скачать

ссылки URL