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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
17 years ago

In Stratix the POR duration depends on PORSEL pin.

if LOW => 100msec

if high => 12 msec

same applies to the config device but:

if LOW => 100msec

if high => 2 msec

It is recommended:

12 msec for stratix, 100msec for config device to make sure who is ready first.

As to power consumption difference, I am sure it is trivial.

For config data size:

You may consider the size of your largesst future device in case you decide to upgrade