wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 55

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
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The polarity of each Digital Microphone output signal can be changed under software control using
the AIFTXL_DATINV and AIFTXR_DATINV register bits. The AIFTXL_SRC and AIFTXR_SRC
register bits may be used to select which Digital Microphone channel is used for the left and right
digital audio interface data. These register bits are described in Table 25.
Table 25 DMIC Routing and Control
The input data source for each DAC can be changed under software control using register bits
AIFRXL_SRC and AIFRXR_SRC. The polarity of each DAC input may also be modified using
register bits AIFRXL_DATINV and AIFRXR_DATINV. These register bits are described in Table 26.
Table 26 DAC Routing and Control
R24 (18h)
Audio
Interface 0
R38 (26h)
DMIC
Digital 0
R24 (18h)
Audio
Interface 0
REGISTER
REGISTER
ADDRESS
ADDRESS
BIT
BIT
12
11
7
6
1
0
5
4
AIFRXR_DATIN
AIFTXR_DATIN
AIFTXL_DATIN
AIFRXL_DATIN
AIFRXR_SRC
AIFTXR_SRC
AIFRXL_SRC
AIFTXL_SRC
LABEL
LABEL
V
V
V
V
DEFAULT
DEFAULT
0
1
0
0
0
0
0
1
Left Digital Audio interface source
0 = Left DMIC data is output on left
channel
1 = Right DMIC data is output on left
channel
Right Digital Audio interface source
0 = Left DMIC data is output on right
channel
1 = Right DMIC data is output on right
channel
Left Digital Microphone Invert
0 = Left DMIC output not inverted
1 = Left DMIC output inverted
Right Digital Microphone Invert
0 = Right DMIC output not inverted
1 = Right DMIC output inverted
Left DAC Invert
0 = Left DAC output not inverted
1 = Left DAC output inverted
Right DAC Invert
0 = Right DAC output not inverted
1 = Right DAC output inverted
Left DAC Data Source Select
0 = Left DAC outputs left interface data
1 = Left DAC outputs right interface data
Right DAC Data Source Select
0 = Right DAC outputs left interface data
1 = Right DAC outputs right interface
data
PD, Rev 4.0, September 2010
DESCRIPTION
DESCRIPTION
WM8918
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