WM9713 datasheet(19/111 Pages) WOLFSON

19 / 111 page

Preliminary Technical Data

WM9713L

PTD, March 2004, Rev 2.2

Clock mode and division ratios are controlled by register 44h as shown in Table 1.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

14:12

SEXT[6:4]

000 (div 1)

Defines clock division ratio for Hi-fi block:

000: f

001: f/2

...

111: f/8

11:8

SEXT[3:0]

0000 (div 1)

Defines clock division ratio for PCM

interface and voice DAC:

0000: f

0001: f/1

…

1111: f/16

CLKSRC

1 (ext clk)

Selects between PLL clock and External

clock

5:3

PENDIV

000 (div 16)

Sets PENADC clock divisor

000: f/16

001: f/12

010: f/8

011: f/6

100: f/4

101: f/3

110: f/2

111: f

CLKBX2

0 (Off)

Clock doubler for MCLKB

CLKAX2

0 (Off)

Clock doubler for MCLKA

44h

CLKMUX

0 (MCLKA)

Selects between MCLKA and MCLKB

(N.B. On power-up clock must be present

on MCLKA and must be active for 2 clock

cycles after switching to MCLKB)

Table 1 Clock Muxing and Division Control

INTERNAL CLOCK FREQUENCIES

The internal clock frequencies are defined as follows (refer to Figure 2):

•

AC97 CLK – nominally 24.576MHz, used to generate AC97 BITCLK at 12.288MHz.

•

HIFI CLK – for HIFI playback at 48ks/s HIFI CLK = 24.576MHz. See Table 2 for voice only

playback.

•

PCM CLK – see Table 2 for sample rate vs clock frequency.

SAMPLE RATE

PCM CLK

FREQUENCY

HIFI CLK

FREQUENCY

8ks/s voice and HIFI

2.048MHz

24.576MHz

8ks/s voice only (power save)

2.048MHz

4.096MHz

16ks/s voice and HIFI

4.096MHz

24.576MHz

16ks/s voice only (power save)

4.096MHz

8.192MHz

32ks/s voice and HIFI

8.192MHz

24.576MHz

48ks/s voice and HIFI

12.288MHz

24.576MHz

Table 2 Clock Division Mode Table

WM9713 bảng dữ liệu(PDF) 19 Page - Wolfson Microelectronics plc

WM9713 bảng dữ liệu(HTML) 19 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 ...More

bảng dữ liệu tải về

Link URL