Part 15: Audio Interface - Alinx Cyclone IV FPGA User Manual

Part 15: Audio Interface

The AX515 development board uses the Wolfon WM8731 audio codec
(CODEC) chip to provide users with a high-quality audio interface. The chip
supports microphone input, line input and line output port, and the sampling rate
is adjustable from 8kHz to 96kHz. The WM8731 supports audio interfaces such
as I2S/PCM/AC97 and I2C control interface. Users can configure the WM8731
through the I2C bus.
Figure 15-1: FPGA and WM8731 connection diagram
Figure 15-2 detailed the audio part on the FPGA board, U11 is WM8731
chip, J7 is the audio input, J8 is the microphone input, and J9 is the audio
output.
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Cyclone IV FPGA Development Board AX515 User Manual
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