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Altera_Forum
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12 years ago

ROM using altsyncram: timing question

Hi, Another newbie question. I have a simple ROM attached to my CPU, courtesy of altsyncram, and initialised using a .HEX file. All works, both in simulator and in the chip. My VHDL d...
Altera_Forum's avatar
Altera_Forum
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12 years ago

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Whilst I greatly appreciate this forum where should I be looking to find out things like this, so that I can reduce my newbie questions?

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Overall, I have found the Altera documentation "pretty good". In general, you can read the manual for the megafunction you are using (in this case, http://www.altera.com/literature/ug/ug_ram_rom.pdf). For something device-specific, you have to go to the device handbook (in this case for a Cyclone IV M9K, http://www.altera.com/literature/hb/cyclone-iv/cyiv-51003.pdf). Unfortunately, I'm not immediately seeing where either of those documents are useful and spell-out your observed behavior. Other than the parameter controlling input/output registering, for example I don't see any waveform that might be obvious.