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Program SPI Serial Flash from Xilinx FPGAs and CPLDs

Authored on: Jan 25, 2006 by Rick Folea

Technical Paper

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The good news: starting with the Xilinx® Spartan™-3E device, you can now use industry-standard SPI Serial Flash to configure your Xilinx FPGAs. Even better news: this will be the trend for all new Xilinx devices going forward, meaning that you will have multiple vendors from which to choose inexpensive and readily available memories.

The bad news: Xilinx won't be supporting these devices with programming tools—you are left on your own to program them. In this article, I'll take a look at SPI Flash, explain your options, and help you get up and running quickly.

Reprinted with permission from Xcell Journal / Fourth Quarter 2005. Article © Xcell Journal.

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jonnydoin Posted Feb 13, 2012

SPI is also a good interface to have in your VHDL tool bag. I have published a free VHDL SPI interface in OpenCores that can be used at over 100MHz of SPI clock, depending on P&R timing closure: http://opencores.org/project,spi_master_slave - Jonny Doin

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