WM8994ECSSLASHR datasheet(63/363 Pages) CIRRUS

63 / 363 page

WM8994

Rev 4.6

DIGITAL AUDIO

INTERFACE 2 (AIF2)

DIGITAL AUDIO

INTERFACE 1 (AIF1)

ADC

DMICDAT1

Gain Codes

V = Full volume control

(-71.625dB to 0dB, 0.375dB steps for DAC

-71.625dB to 17.625dB, 0.375dB steps for ADC/MICs)

S = Softmute/un-mute

G = Fixed gain control

(-36dB to 0dB, 3dB steps)

[Code]

MIC activity detector

(GPIO/Interrupt)

DRC

DAC

DAC1L

Vol

DAC1R

Vol

DAC2L

Vol

DAC2R

Vol

G G

DAC

Audio Interface 1

(AIF1) Output Mixing

Digital Sidetone

Mixing

Digital Sidetone Volume

and Filter Control

DAC Output

Digital Mixing

DAC Digital

Volume

Digital Audio

Interface Control

Sample Rate

Conversion

= SRC not supported

AIF1 Slot 0

AIF1 Slot 1

AIF1 Slot 0

DMICDAT2

fs / 4fs Select

DRC

AIF1 Slot 1

Left / Right source select / Mono Mix control

Left / Right source select /

Mono Mix control

DRC

Dynamic Range Control (DRC) /

Retune Mobile Parameter Equalizer (EQ) /

Stereo 3D Expansion /

Digital Volume and Filter Control

Note that the DRCs cannot be enabled

in the input and output paths of any

Digital Audio Interface simultaneously

Figure 21 Digital Core Architecture

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