which SRAM that FPGA configuration will be loaded?

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Dear experts,

I am a new with Altera device (Cyclone III EP3C25) and wonder if someone can help me answer below question:

During boot-up when the FPGA configuration file (.sof) is loaded to SRAM, which SRAM will be used? Is it on-chip SRAM (M9K)?

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FPGAs have a large number of configurable elements: the LUTs/Logic Elements, the I/O elements, the interconnect matrix and other specialized elements such as M9K, multpliers, PLLs, etc, etc.

Each and every element needs to have it's configuration set somehow.

In a SRAM based FPGA, as are Cyclone and Stratix (and Spartan and Virtex), the configuration values are held inside the FPGA by small SRAMs.

For example, for each 4 input LUT, there's a 16x1 bit SRAM that holds the look-up table.

When the FPGA configuration (the .sof) is loaded, it's loaded into each and every of those SRAMs.

Daixiwen, rbugalho,

Thank you very much for the answers.

It became clear to me now:)

Hello, buy a DE2 development board for a project. and need to read 960 bits from SDRAM to the FPGA in parallel, but I have not found a way to do this, please if anyone can help thank you.

Greetings from Colombia