WM8281ECSSLASHR datasheet(55/392 Pages) CIRRUS

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WM8281

Rev 4.0

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R802

(0322h)

DMIC3L

Control

5:0

IN3L_DMIC_DLY

[5:0]

00h

Input Path 3 (Left) Digital Delay

(Applicable to digital input only)

LSB = 1 sample, Range is 0 to 63.

(Sample rate is controlled by IN3_OSR.)

R804

(0324h)

IN3R

Control

IN3R_HPF

Input Path 3 (Right) HPF Enable

0 = Disabled

1 = Enabled

7:1

IN3R_PGA_VOL

[6:0]

40h

Input Path 3 (Right) PGA Volume

(Applicable to analogue inputs only)

00h to 3Fh = Reserved

40h = 0dB

41h = 1dB

42h = 2dB

… (1dB steps)

5F = 31dB

60h to 7Fh = Reserved

R806

(0326h)

DMIC3R

Control

5:0

IN3R_DMIC_DLY

[5:0]

00h

Input Path 3 (Right) Digital Delay

(Applicable to digital input only)

LSB = 1 sample, Range is 0 to 63.

(Sample rate is controlled by IN3_OSR.)

R808

(0328h)

IN4L

Control

IN4L_HPF

Input Path 4 (Left) HPF Enable

0 = Disabled

1 = Enabled

14:13

IN4_OSR [1:0]

Input Path 4 DMIC Oversample Rate

Controls the DMIC4 sample rate as below:

00 = 1.536MHz

01 = 3.072MHz

10 = 6.144MHz

11 = 768kHz

When IN4_OSR=11, the Input Path

sample rate (for all input paths) must be in

the range 8kHz to 16kHz.

If Input Path 4 DMIC is selected as a

source for the Rx ANC function, the

DMICCLK4 frequency will be set to

3.072MHz.

12:11

IN4_DMIC_SUP

[1:0]

Input Path 4 DMIC Reference Select

(Sets the DMICDAT4 and DMICCLK4

logic levels)

00 = MICVDD

01 = MICBIAS1

10 = MICBIAS2

11 = MICBIAS3

R810

(032Ah)

DMIC4L

Control

5:0

IN4L_DMIC_DLY

[5:0]

00h

Input Path 4 (Left) Digital Delay

(Applicable to digital input only)

LSB = 1 sample, Range is 0 to 63.

(Sample rate is controlled by IN4_OSR.)

R812

(032Ch)

IN4R

Control

IN4R_HPF

Input Path 4 (Right) HPF Enable

0 = Disabled

1 = Enabled

R814

(032Eh)

DMIC4R

Control

5:0

IN4R_DMIC_DLY

[5:0]

00h

Input Path 4 (Right) Digital Delay

(Applicable to digital input only)

LSB = 1 sample, Range is 0 to 63.

(Sample rate is controlled by IN4_OSR.)

Table 3 Input Signal Path Configuration

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