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Altera_Forum
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16 years ago

Details about the Avalon Bus

Greetings! I just want to ask what exactly is the Avalon Bus for? What is it and how is it different from I2C bus interface? I am going to implement an SD controller and the DE2 board implement...
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Altera_Forum
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16 years ago

The Avalon Bus is a framework interface that is the foundation of the SOPC builder tool.

http://www.altera.com/literature/manual/mnl_avalon_spec.pdf

The Avalon Bus is it's own protocol and it is a parallel interface as opposed to SPI and I2C which are serial in nature.

The reason the Avalon interface is used on the DE2 board for the SPI controller is to allow the module to be instantiated in an SOPC builder project. It is SPI on one side and Avalon on the other.