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Altera_Forum
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17 years ago

Size of the my digital system into the EPCS16

I am using a DE2 board with a 16 Mbits in its serial config device. How do I know if my design fits into the serial configuration device? I found that RPD file is always of a same size no matter how ...
Altera_Forum's avatar
Altera_Forum
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17 years ago

The size of the uncompressed configuration data is fixed for a given FPGA. So a 2C35 will always require the exact same number of configurations bits and it can be found in the documentation as a previous poster pointed out.

However, compression can be enabled on the bitstream and will compress the data by 35-55%. This compressed file size can vary by design. You can use 0.65 * (rbf size) as an upper limit to the size of the compressed file.

Uncompression is performed by the FPGA on the fly as it receives the compressed bitstream so this can reduce the config time in addition to saving space in the EPCS device.