de2 board minimum voltage

[Altera_Forum]

hi  

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

[Altera_Forum]

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?

[Altera_Forum]

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

[Altera_Forum]

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.

[Altera_Forum]

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 ?

[Altera_Forum]

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

[Altera_Forum]

thanks a lot (:

[Altera_Forum]

hi  

I followed the manual but when I press start I got this massage   "Cannot start device configuration because no programming options have been selected for device chain"   what can I do?

[Altera_Forum]

Hi 

I was successfully burn something nut it's not my code... the altera de2 board have a blue power led on and every of the other green and red and lcd screen is turn on weak I tried to erase and burn again but I got the same result

[Altera_Forum]

The burning process still doesn't work I did everything that was said in the manual but nothing  

In quartus there is no warning and as far as he consider everything is ok But I didn't get the code to burn on the card instead all of the lights or turned on in a weak light I added a screen shot of the programming window Hope someone could help 

[Altera_Forum]

maybe I need to use the altserial_flash_loader component?

[Altera_Forum]

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]

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]

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)