Altera DE1-SoC - DE1-SoC 24-bit Audio CODEC

DE1-SoC User Manual
30
www.terasic.com
March 14, 2014
GPIO_1 [12]
PIN_AH27
GPIO Connection 1[12]
3.3V
GPIO_1 [13]
PIN_AJ27
GPIO Connection 1[13]
3.3V
GPIO_1 [14]
PIN_AK29
GPIO Connection 1[14]
3.3V
GPIO_1 [15]
PIN_AK28
GPIO Connection 1[15]
3.3V
GPIO_1 [16]
PIN_AK27
GPIO Connection 1[16]
3.3V
GPIO_1 [17]
PIN_AJ26
GPIO Connection 1[17]
3.3V
GPIO_1 [18]
PIN_AK26
GPIO Connection 1[18]
3.3V
GPIO_1 [19]
PIN_AH25
GPIO Connection 1[19]
3.3V
GPIO_1 [20]
PIN_AJ25
GPIO Connection 1[20]
3.3V
GPIO_1 [21]
PIN_AJ24
GPIO Connection 1[21]
3.3V
GPIO_1 [22]
PIN_AK24
GPIO Connection 1[22]
3.3V
GPIO_1 [23]
PIN_AG23
GPIO Connection 1[23]
3.3V
GPIO_1 [24]
PIN_AK23
GPIO Connection 1[24]
3.3V
GPIO_1 [25]
PIN_AH23
GPIO Connection 1[25]
3.3V
GPIO_1 [26]
PIN_AK22
GPIO Connection 1[26]
3.3V
GPIO_1 [27]
PIN_AJ22
GPIO Connection 1[27]
3.3V
GPIO_1 [28]
PIN_AH22
GPIO Connection 1[28]
3.3V
GPIO_1 [29]
PIN_AG22
GPIO Connection 1[29]
3.3V
GPIO_1 [30]
PIN_AF24
GPIO Connection 1[30]
3.3V
GPIO_1 [31]
PIN_AF23
GPIO Connection 1[31]
3.3V
GPIO_1 [32]
PIN_AE22
GPIO Connection 1[32]
3.3V
GPIO_1 [33]
PIN_AD21
GPIO Connection 1[33]
3.3V
GPIO_1 [34]
PIN_AA20
GPIO Connection 1[34]
3.3V
GPIO_1 [35]
PIN_AC22
GPIO Connection 1[35]
3.3V
3.6.4 24-bit Audio CODEC
The DE1-SoC board offers 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 adjustable
sample rate from 8 kHz to 96 kHz. The WM8731 is controlled via serial I2C bus, which is
connected to HPS or Cyclone V SoC FPGA through an I2C multiplexer. The connection of the
audio circuitry to the FPGA is shown in Figure 3-19, and the associated pin assignment to the
FPGA is listed in Table 3-12. More information about the WM8731 codec is available in its
datasheet, which can be found on the manufacturer’s website, or in the directory
\DE1_SOC_datasheets\Audio CODEC of DE1-SoC System CD.
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