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Altera_Forum
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15 years ago

CIII/EPCS design configures and programs but does not start

Hi, I have a design with EP3C40 and EPCS64. I create flash files with: sof2flash --epcs --compress --input=logic.sof --output=logic.srec elf2flash --epcs --after=logic.srec --input=softwar...
Altera_Forum's avatar
Altera_Forum
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15 years ago

The SDRAM will need several (refresh?) cycles [1] after poweron before it will hold data. The SDRAM controller probably does these - but they'll take a few clocks.

[1] Well EDO DRAM needed them, which meant the software had to perform them before doing anything else.