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Altera_Forum's avatar
Altera_Forum
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17 years ago

Configuration flash size for Cyclone III

I'm designing a board with a Cyclone III on it and a microcontroller. I need some guidelines on different ways of booting the Cyclone III and how big the flash needs to be. The Cyclone III comes i...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Bringing this thread back to life. Looking at that document and trying to estimate the configuration time. I intend to use an EP3C16 device in a n EQFP144 package and the image size is 4.1Mbit according to the document.

However I'm not sure what kind of start-up time I can expect. The configuration time would be between 205ms and 103ms according to the manual but as far as I understand, that does not include the time it takes the device to power up (POR time). I'm a bit confused as to what exactly it means to switch between a standard or a fast POR time, what exactly I need to do in my circuit design to support a fast POR time, I understand there is a power requirement difference.