Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

Preview PDF HTML

WM8974 Datasheet(PDF) 21 Page - Cirrus Logic

Part # WM8974
Description  Mono CODEC with Speaker Driver
PDF  89 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8974 Datasheet(HTML) 21 Page - Cirrus Logic

Back Button WM8974 Datasheet HTML 17Page - Cirrus Logic WM8974 Datasheet HTML 18Page - Cirrus Logic WM8974 Datasheet HTML 19Page - Cirrus Logic WM8974 Datasheet HTML 20Page - Cirrus Logic WM8974 Datasheet HTML 21Page - Cirrus Logic WM8974 Datasheet HTML 22Page - Cirrus Logic WM8974 Datasheet HTML 23Page - Cirrus Logic WM8974 Datasheet HTML 24Page - Cirrus Logic WM8974 Datasheet HTML 25Page - Cirrus Logic Next Button
Zoom Inzoom in Zoom Outzoom out
 21 / 89 page
background image
WM8974
Rev 4.7
21
HPFCUT
FS (KHZ)
SR=101/100
SR=011/010
SR=001/000
8
11.025
12
16
22.05
24
32
44.1
48
000
82
113
122
82
113
122
82
113
122
001
102
141
153
102
141
153
102
141
153
010
131
180
196
131
180
196
131
180
196
011
163
225
245
163
225
245
163
225
245
100
204
281
306
204
281
306
204
281
306
101
261
360
392
261
360
392
261
360
392
110
327
450
490
327
450
490
327
450
490
111
408
563
612
408
563
612
408
563
612
Table 11 High-Pass Filter Cut-off Frequencies (HPFAPP=1)
Note that the High-Pass filter values (when HPFAPP=1) work on the basis that the SR register bits
are set correctly for the actual sample rate as shown in Table 11.
PROGRAMMABLE NOTCH FILTER
A programmable notch filter is provided. This filter has a variable centre frequency and bandwidth,
programmable via two coefficients, a0 and a1.
These coefficients should be converted to 2’s
complement numbers to determine the register values. a0 and a1 are represented by the register bits
NFA0[13:0] and NFA1[13:0]. Because these coefficient values require four register writes to setup
there is an NFU (Notch Filter Update) flag which should be set only when all four registers are setup.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R27
Notch Filter 1
6:0
NFA0[13:7]
0
Notch Filter a0 coefficient, bits [13:7]
7
NFEN
0
Notch filter enable:
0=Disabled
1=Enabled
8
NFU
0
Notch filter update. The notch filter values
used internally only update when one of
the NFU bits is set high.
R28
Notch Filter 2
6:0
NFA0[6:0]
0
Notch Filter a0 coefficient, bits [6:0]
8
NFU]
0
Notch filter update. The notch filter values
used internally only update when one of
the NFU bits is set high.
R29
Notch Filter 3
6:0
NFA1[13:7]
0
Notch Filter a1 coefficient, bits [13:7]
8
NFU
0
Notch filter update. The notch filter values
used internally only update when one of
the NFU bits is set high.
R30
Notch Filter 4
6:0
NFA1[6:0]
0
Notch Filter a1 coefficient, bits [6:0]
8
NFU
0
Notch filter update. The notch filter values
used internally only update when one of
the NFU bits is set high.
Table 12 Notch Filter Function



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


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com