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The DE2-115 board provides high-quality 24-bit audio via the Wolfson WM8731 audio CODEC
(Encoder/Decoder). This chip supports microphone-in, line-in, and line-out ports, with a sample rate
adjustable from 8 kHz to 96 kHz. The WM8731 is controlled via serial I2C bus interface*, which is
connected to pins on the Cyclone IV E FPGA. A schematic diagram of the audio circuitry is shown
in Figure 4-23, and the FPGA pin assignments are listed in Table 4-17. Detailed information for
using the WM8731 codec is available in its datasheet, which can be found on the manufacturer‟s
website, or in the DE2_115_datasheets\Audio CODEC folder on the DE2-115 System CD.
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