WM8994ECSSLASHR datasheet(67/363 Pages) CIRRUS

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WM8994

Rev 4.6

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1536 (0600h)

DAC1 Mixer

Volumes

8:5

ADCR_DAC1_V

OL [3:0]

0000

Sidetone STR to DAC1L and

DAC1R Volume

0000 = -36dB

0001 = -33dB

…. (3dB steps)

1011 = -3dB

1100 = 0dB

(see Table 19 for gain range)

3:0

ADCL_DAC1_V

OL [3:0]

0000

Sidetone STL to DAC1L and

DAC1R Volume

0000 = -36dB

0001 = -33dB

…. (3dB steps)

1011 = -3dB

1100 = 0dB

(see Table 19 for gain range)

R1539 (0603h)

DAC2 Mixer

Volumes

8:5

ADCR_DAC2_V

OL [3:0]

0000

Sidetone STR to DAC2L and

DAC2R Volume

0000 = -36dB

0001 = -33dB

…. (3dB steps)

1011 = -3dB

1100 = 0dB

(see Table 19 for gain range)

3:0

ADCL_DAC2_V

OL [3:0]

0000

Sidetone STL to DAC2L and

DAC2R Volume

0000 = -36dB

0001 = -33dB

…. (3dB steps)

1011 = -3dB

1100 = 0dB

(see Table 19 for gain range)

R1569 (0621h)

Sidetone

9:7

ST_HPF_CUT

[2:0]

000

Sidetone HPF cut-off frequency

(relative to 44.1kHz sample rate)

000 = 2.7kHz

001 = 1.35kHz

010 = 675Hz

011 = 370Hz

100 = 180Hz

101 = 90Hz

110 = 45Hz

111 = Reserved

Note - the cut-off frequencies scale

with the Digital Mixing (SYSCLK)

clocking rate. The quoted figures

apply to 44.1kHz sample rate.

ST_HPF

Digital Sidetone HPF Select

0 = Disabled

1 = Enabled

Table 18 Digital Sidetone Volume Control

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