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Altera_Forum
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10 years ago

Cyclone V spi memory access

Hi, I wanted to know if the spi flash memory which is present inside the cyclone v can be accessed directly by an external flash. If so can anyone guide me through to how to do it as I am not a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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If you want to be able to access the quad SPI flash that is used to configure the image for the FPGA after the configuration is complete, you can instantiate the alt serial flash module that will allow you to access the FPGA pins connected to the SPI device. I use this block to allow my SPI flash config memory to be accessible via the JTAG chain, but it has capabilities beyond just this function.

All the details are here: https://www.altera.com/literature/an/an370.pdf

(https://www.altera.com/literature/an/an370.pdf)

You want to look at the 'Share ASMI interface in your design' option description.

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I did get access to the flash. Thanks for the info and the document. :)