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Lab 7: Interfacing FPGA Spartan-6 with AC’97 Codec
http://www.dejazzer.com/ee478/labs/lab7_audio_ac97.pdf
FPGA to communicate with and control the codec. The driver can select the input into the codec (e.g., microphone, line-in) and set the volume – via the slide switches of the Atlys board. 2. Introduction AC'97 (Audio Codec '97; also MC'97 for Modem Codec '97) is an audio codec standard developed by Intel Architecture Labs in 1997.
Numato Lab - Stereo Audio Codec AC'97 LM4550 - Botland ...
https://botland.store/fpga-boards-and-kits/12185-numato-lab-stereo-audio-codec-ac-97-lm4550-extension-for-fpga-boards-5904422318826.html
Description. Module with LM4550 system, audio codec, compliant with AC'97 Rev 2.1, which lets you create and record high quality stereo sound. It has a built-in headphone amplifier with separate amplification control. Dynamic range is 90 dB. Compatible with plates Numato FPGA Laboratory, equipped with connectors 2 x 6 pin.
LM4550 AC’97 Stereo Audio Codec Expansion Module | Numato Lab
https://numato.com/product/lm4550-ac97-stereo-audio-codec-expansion-module/
This module features LM4550, an AC’97 Rev 2.1 compliant audio codec which enables producing and recording high-quality stereo audio. This module is designed to be used with Numato Lab’s FPGA/Microcontroller boards featuring a 2×6 pin Expansion connector. It can also be used with other boards and connector types by using manual wiring.
Checkpoint 1 AC97 Audio - University of California, Berkeley
https://inst.eecs.berkeley.edu/~cs150/fa07/Labs/Checkpoint1.pdf
2.2 AC97 Audio Codec The AC97 Audio Codec is simply a chip meant to convert between analog audio signals such as those going to the speakers/microphone and digital PCM signals which are easy to work with on an FPGA or in a computer.
ac 97 codec | JR's EE Blog
https://jreeblog.wordpress.com/tag/ac-97-codec/
The AC97 codecs generally have capabilities for several different stereo and mono inputs and outputs, including mics and headphones. They have muxes to select which input and output to use for each frame of communication. There is a protocol that all AC97 codecs use that includes frames for controlling registers and transferring audio.
audio - Using the AC97 Codec on an Atlys Spartan 6 Board ...
https://electronics.stackexchange.com/questions/12383/using-the-ac97-codec-on-an-atlys-spartan-6-board
I'm a beginner to FPGA programming. I just started programming an Atlys Spartan 6 board and so far have written one program to blink LEDs in a counter pattern. Now I'm trying to send the clock signal down-sampled to audio frequencies to the AC97 codec. Here is …
GitHub - evanfrazierc/FPGA-MP3-Player
https://github.com/evanfrazierc/FPGA-MP3-Player
Audio Codec. The AC97 Codec on the FPGA board interfaces with the verilog module using five pins: BIT_CLK is a 12.288 MHz clock signal the controller will use to move data bits. SYNC synchronizes each 256 bit frame which will be split up into 13 slots. Each SYNC cycle is 256 bit_clk cycles long. This makes the SYNC signal a 48 KHz oscillating ...
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