WM8962B datasheet(76/295 Pages) WOLFSON

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WM8962

Rev 4.3

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R5 (05h)

ADC & DAC

Control 1

ADC_HPF_DIS

ADC High-Pass Filter Disable

0 = Enable

1 = Disable

R6 (06h)

ADC & DAC

Control 2

13:12

ADC_HPF_SR [1:0]

ADC High-Pass Filter Sample rate

00 = 8k, 11.025k, 12k

01 = 16k, 22.025k, 24k

10 = 32k, 44.1, 48k

11 = 88.2k, 96k

This field is for read-back only; it is

set automatically and cannot be

adjusted

ADC_HPF_MODE

ADC High-Pass Filter Mode select

0 = Hi-Fi mode (1st order)

1 = Application mode (2nd order)

9:7

ADC_HPF_CUT[2:0]

000

ADC High-Pass Filter Cutoff

Note that the cut-off frequency

scales with sample rate. See

Table 32 for cut-off frequencies at

all supported sample rates

Table 31 ADC High-Pass Filter

SAMPLE

FREQUENCY

(

kHz)

CUT-OFF FREQUENCY (Hz)

HI-FI

MODE

APPLICATION MODE / ADC_HPF_CUT[2:0]

000

001

010

011

100

101

110

111

8.000

3.0

80.5

100.5

129.0

160.5

200.5

256.5

320.5

400.5

11.025

4.5

111.0

138.5

177.5

221.0

276.5

353.0

442.0

551.5

12.000

4.5

120.5

151.0

193.0

240.5

300.5

384.5

481.0

600.5

16.000

3.0

80.0

101.0

129.0

161.0

200.5

256.5

321.0

401.0

22.050

4.5

110.5

139.0

177.5

221.5

276.0

353.5

442.0

552.5

24.000

4.5

120.5

151.5

193.5

241.5

300.5

385.0

481.5

601.0

32.000

2.5

80.0

101.5

129.0

160.5

200.0

257.5

320.0

401.0

44.100

3.5

110.0

139.5

177.5

221.0

275.5

355.0

441.0

552.5

48.000

4.0

119.5

152.0

193.0

240.5

300.0

386.5

480.0

601.0

88.200

3.5

112.5

139.0

177.0

220.0

274.0

355.0

442.0

551.0

96.000

4.0

122.5

151.5

192.5

239.5

298.0

386.5

481.0

600.0

Note:

‘Hi-Fi Mode’ refers to the mode when ADC_HPF_MODE = 0 (first order filtering and a cut-

off frequency of 3.5Hz at a sample rate of 44.1kHz); ‘Application Mode’ refers to the mode when

ADC_HPF_MODE = 1 (second order filtering and the cut-off frequency set by ADC_HPF_CUT)

Table 32 ADC High-Pass Filter Cut-Off Frequencies

The high-pass filter characteristics are shown in the

“Digital Filter Characteristics” section.

WM8962B Datasheet(PDF) 76 Page - Wolfson Microelectronics plc

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