hi could I operate the de2 board with less then 9 volt ?

I am having trouble with burning my code into the DE2 board SDRAM (that way I wouldn't need to burn my code every time I shut his power down) does any body know how could I do that?

And yes I can activate the system with less than 9 [v] but their is a catch at 5 [v] min (although the chip himself is working at 1.2 [v] as I was told) the system is comming to life but in order to burn new programs to the board need we need at least 6 [v] and in order to activate all the sensors and motors and even the communication module that is connected to my system the board needed at least 8[v] weird ... but I guess it could change form system to system

If you examine the DE2 schematic, you'll notice that the 3.3V switcher LM2676 has a specified minimum inpout voltage of 8V. There's no specification about reduced performanve with lower input voltage. In addition a voltage drop of 0.6..0.8 will be caused by the schottky bridge rectifier.

thanks , I did examine the schematic (wasn't easy to find) but I didn't thought about the minimum voltage needed to activate the regulator. so I guss that's way all of my gpio connections didn't work. do you know what do I need to do in order to burn my code into the DE2 memory execpt from switching the switch to prog state ?

Refer to the user manual chapter "Configuring the EPCS16 in AS Mode"

de2 board minimum voltage | Altera Community

13 Replies

Altera_Forum
Honored Contributor
15 years ago
today I tried to burn again with two other cards
one de2-70 and another de2-35
I failed in both attempts ... is it even possible to burn with the
as-programming mode?
Altera_Forum
Honored Contributor
15 years ago
The programmer screenshot looks like AS programming has been succesful. In case of doubt, you are also able to verify the EPCS data. Sucessful programming doesn't imply, that the code is valid for the respective FPGA, however. But that's nothing we can help with. Did you try to run the same code through (volatile) JTAG programming?
Altera_Forum
Honored Contributor
15 years ago
yes and it works
I also check the verify checkbox and everything was ok
but the board still remained in the previous state ( turn on on weak light)

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de2 board minimum voltage

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