wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 54

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

WM8918
DIGITAL MIXING
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The Digital Microphone and DAC data can be combined in various ways to support a range of
different usage modes.
Data from either of the two Digital Microphone channels can be routed to either the left or the right
channel of the digital audio interface. In addition, data from either of the digital audio interface
channels can be routed to either the left or the right DAC. See "Digital Audio Interface" for more
information on the audio interface.
The WM8918 provides a Dynamic Range Control (DRC) feature, which can apply compression and
gain adjustment in the digital domain to either the Digital Microphone or DAC signal path. This is
effective in controlling signal levels under conditions where input amplitude is unknown or varies over
a wide range.
The DACs can be configured as a mono mix of the two audio channels. Digital sidetone from the
Digital Microphones can also be selectively mixed into the DAC output path.
DIGITAL MIXING PATHS
Figure 35 shows the digital mixing paths available in the WM8918 digital core.
Figure 35 Digital Mixing Paths
PD, Rev 4.0, September 2010
Production Data
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