Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

A question about cyclone3 boot configuration from external flash

Hi everyboby. I've got an ebv cyclone 3 demoboard (dbc3c40). Actually I'm able to program via jtag both epcs and cfi flash but only the epcs one lets the fpga configuration when I restart the en...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hi,

I know the dbc3c40 board too.

Cyclone III supports active serial ( serial epcs device ) and active parallel configuration ( cfi flash ).

But if you want to configure your device from cfi flash, you have to set the correct msel pins. But that's not all !!!. You have to connect the cfi flash to the dedicated programming pins on your device ! ( See Cyclone III Handbook, active parallel configuration sheme ).

On the dbc3c40 the cfi flash is connected to gpio pins. Only the epcs flash is connected to dedicated programming pins.

So you can only use the active serial configuration mode.

If you use the Altera Cyclone III Starter Kit, there you can use the active parallel configuration mode with a cfi flash.