WM8993 Datasheet, PDF (176/229 Pages) Wolfson Microelectronics plc – Audio Hub CODEC for Multimedia Phones

WM8993
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
10 = Right ADC
11 = Reserved
1:0 ADC_TO_DAC
00
Right DAC Digital Sidetone Source
R [1:0]
00 = No sidetone
01 = Left ADC
10 = Right ADC
11 = Reserved
Register 0Dh Digital Side Tone
Production Data
REGISTER
ADDRESS
R14 (0Eh)
ADC CTRL
BIT
LABEL
DEFAULT
DESCRIPTION
9 ADC_OSR128
1
ADC Oversample Rate Select
0 = disabled
1 = enabled
For 48kHz sample rate, the ADC oversample rate is
128fs when ADC_OSR128 is selected. Setting this bit
to 0 selects 64fs mode.
Default is 128fs.
8
ADC_HPF
1
ADC Digital High Pass Filter Enable
0 = disabled
1 = enabled
6:5 ADC_HPF_CU
00
ADC Digital High Pass Filter Cut-Off Frequency (fc)
T [1:0]
00 = Hi-fi mode (fc=4Hz at fs=48kHz)
01 = Voice mode 1 (fc=127Hz at fs=16kHz)
10 = Voice mode 2 (fc=130Hz at fs=8kHz)
11 = Voice mode 3 (fc=267Hz at fs=8kHz)
(Note: fc scales with sample rate.)
1 ADCL_DATINV
0
Left ADC Invert
0 = Left ADC output not inverted
1 = Left ADC output inverted
0
ADCR_DATIN
V
0
Right ADC Invert
0 = Right ADC output not inverted
1 = Right ADC output inverted
Register 0Eh ADC CTRL
REGISTER BIT
ADDRESS
R15 (0Fh)
8
Left ADC
Digital
Volume
7:0
LABEL
DEFAULT
DESCRIPTION
ADC_VU
ADCL_VOL
[7:0]
0
ADC Volume Update
Writing a 1 to this bit will cause left and right ADC
volume to be updated simultaneously
1100_0000 Left ADC Digital Volume
00h = MUTE
01h = -71.625dB
… (0.375dB steps)
EFh = +17.625dB
Register 0Fh Left ADC Digital Volume
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PD, November 2010, Rev 4.0
176