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How can i estimate a .pof file size？

Altera_Forum
Honored Contributor II
‎03-23-2010 02:49 AM
1,649 Views

i'm doing a project with EP3C, and the PCB is small, so i have to use the smallest area of ecps in the pcb. I read the file"cyc3_ciii51016.pdf",in table 9-3, it lists the size of .rbf. I wonder what the relation between .pof and .rbf. And can i think it's the maximum size of the .pof without .hex and anything else, or the size is fixed ?

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Altera_Forum
Honored Contributor II
‎03-23-2010 03:05 PM
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.rbf is the contents of the EPCS 

.sof has some more stuff like a header. 

 

To choose an EPCS device, all you need to know is the .rbf size. And if you use compression (available for free in EP3C FPGAs) it even gets smaller.
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Altera_Forum
Honored Contributor II
‎03-24-2010 02:04 AM
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that means i can think the size is fixed?and is it just decided by what the model i use ? 

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Altera_Forum
Honored Contributor II
‎03-24-2010 02:21 PM
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If you don't use compression, the size is fixed for any given device. 

 

If you use compression, it'll be smaller than the fixed size but will vary from design to design.
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