wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 128

• Manufacturer Part Number: wm8903
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8903
R37 (25h)
ADC Digital
Volume
Right
Register 25h ADC Digital Volume Right
R38 (26h)
ADC Digital
0
Register 26h ADC Digital 0
w
REGISTER
REGISTER
ADDRESS
ADDRESS
BIT
6:5
BIT
7:0
4
1
0
8
ADC_HPF_CUT[1:0]
ADCR_VOL[7:0] 1100_0000 Right ADC Digital Volume
ADC_HPF_ENA
ADCR_DATINV
ADCL_DATINV
ADCVU
LABEL
LABEL
DEFAULT
DEFAULT
0
00
0
0
0
ADC Volume Update
Writing a 1 to this bit causes left and right ADC
volume to be updated simultaneously
00h = Mute
01h = -71.625dB
02h = -71.250dB
… (0.375dB steps)
C0h = 0dB
… (0.375dB steps)
EFh = +17.625dB
F0h to FFh = +17.625dB
ADC Digital High Pass Filter Cut-Off Frequency
(fc)
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 fs.)
ADC Digital High Pass Filter Enable
0 = disabled
1 = enabled
Left ADC Invert
0 = Left ADC output not inverted
1 = Left ADC output inverted
Right ADC Invert
0 = Right ADC output not inverted
1 = Right ADC output inverted
DESCRIPTION
DESCRIPTION
PP, Rev 3.1, August 2009
Pre-Production
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