WM8980CGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM8980CGEFL/RV Datasheet - Page 47

• Manufacturer Part Number: WM8980CGEFL/RV
• Description: Stereo CODEC with Speaker Driver and Video Buffer
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
Figure 23 Noise Gate Operation
OUTPUT SIGNAL PATH
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The WM8980 output signal paths consist of digital application filters, up-sampling filters, stereo Hi-Fi
DACs, analogue mixers, speaker, stereo headphone and stereo line/mono/midrail output drivers. The
digital filters and DAC are enabled by register bits DACENL And DACENR. The mixers and output
drivers can be separately enabled by individual control bits (see Analogue Outputs). Thus it is
possible to utilise the analogue mixing and amplification provided by the WM8980, irrespective of
whether the DACs are enabled or not.
The WM8980 DACs receive digital input data on the DACDAT pin. The digital filter block processes
the data to provide the following functions:
High performance sigma-delta 24-bit audio DAC converts the digital data into an analogue signal.
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Digital volume control
Graphic equaliser
Digital peak limiter.
Sigma-Delta Modulation
PP, Rev 3.8, May 2012
WM8980
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