WM8281ECSSLASHR datasheet(65/392 Pages) CIRRUS

65 / 392 page

WM8281

Rev 4.0

The ASRC, ISRC, and DSP Aux Input functions support selectable input sources, but do not

incorporate any digital mixing. The respective input source (*_SRCn) registers are identical to those of

the digital mixers.

The *_SRCn registers select the input source(s) for the respective mixer or signal processing block.

Note that the selected input source(s) must be configured for the same sample rate as the block(s) to

which they are connected. Sample rate conversion functions are available to support flexible

interconnectivity -

see “Asynchronous Sample Rate Converter (ASRC)” and “Isochronous Sample

Rate Converter (ISRC)

”.

A status bit associated with each of the configurable input sources provides readback for the

respective signal path. If an Underclocked Error condition occurs, then these bits provide readback of

which signal path(s) have been successfully enabled.

The generic register definition for the digital mixers is provided in Table 8.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1600

(0640h)

R3000

(0BB8h)

*_STSn

Valid for every

digital core

function input

(digital mixers,

DSP Aux inputs,

ASRC & ISRC

inputs).

[Digital Core function] input n status

0 = Disabled

1 = Enabled

7:1

*_VOLn

Valid for every

digital mixer input.

40h

[Digital Core mixer] input n volume

-32dB to +16dB in 1dB steps

00h to 20h = -32dB

21h = -31dB

22h = -30dB

... (1dB steps)

40h = 0dB

... (1dB steps)

50h = +16dB

51h to 7Fh = +16dB

7:0

*_SRCn

Valid for every

digital core

function input

(digital mixers,

DSP Aux inputs,

ASRC & ISRC

inputs).

00h

[Digital Core function] input n source

select

00h = Silence (mute)

04h = Tone generator 1

05h = Tone generator 2

06h = Haptic generator

08h = AEC loopback

0Ch = Mic Mute Mixer

0Dh = Noise generator

10h = IN1L signal path

11h = IN1R signal path

12h = IN2L signal path

13h = IN2R signal path

14h = IN3L signal path

15h = IN3R signal path

16h = IN4L signal path

17h = IN4R signal path

20h = AIF1 RX1

21h = AIF1 RX2

22h = AIF1 RX3

23h = AIF1 RX4

24h = AIF1 RX5

25h = AIF1 RX6

26h = AIF1 RX7

27h = AIF1 RX8

WM8281ECS/R Scheda tecnica(PDF) 65 Page - Cirrus Logic

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