WM8569 Datasheet, PDF (25/36 Pages) Wolfson Microelectronics plc – 24-bit, 192kHz Stereo CODEC with Volume Control

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WM8569
ADC MUTE MODES
Each ADC channel also has a mute control bit, which mutes the inputs to the ADC.
REGISTER ADDRESS BIT
0001100
0
ADC Mute
LABEL
AMUTER
1
AMUTEL
2 AMUTEALL
DEFAULT
0
0
0
DESCRIPTION
ADC Mute Select:
0 : Normal operation
1: mute ADC right
ADC Mute Select:
0 : Normal operation
1: mute ADC left
ADC Mute Select:
0 : Normal operation
1: mute both ADC channels
DE-EMPHASIS MODE
Each stereo DAC channel has an individual de-emphasis control bit:
REGISTER ADDRESS BIT
0001001
6
DAC De-Emphahsis
Control
LABEL
DEEMPH
DEFAULT
0
DESCRIPTION
De-emphasis Channel Selection
Select:
0 = Not de-emphasis
1 = De-emphasis
POWERDOWN MODE AND ADC/DAC DISABLE
The ADC and DAC may be powered down individually by setting the ADCPD and DACPD disable
bits. Setting ADCPD will disable the ADC and select a low power mode. The ADC digital filters will be
reset and will reinitialise when ADCPD is unset. Setting DACPD will disable the DAC and select a low
power mode.
REGISTER ADDRESS BIT
0001010
0
Powerdown Control
1
LABEL
ADCPD
DACPD
DEFAULT
0
0
DESCRIPTION
ADC Disable:
0: Active
1: Disable
DAC Disable
MASTER POWERDOWN
This control bit powers down the references for the whole chip. Therefore for complete powerdown,
both the ADC and DACs should be powered down first before setting this bit.
REGISTER ADDRESS
0001010
Interface Control
BIT LABEL DEFAULT
4 PWRDNALL
0
DESCRIPTION
Master Power Down Bit:
0: Not powered down
1: Powered down
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PP Rev 1.1 December 2005
25