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Altera_Forum
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14 years ago

about the CONF_DONE in the PS configuration

Dear all, I am trying to configure the Cyclone III device using the Passive Serial mode. In the very beginning, I draw the nCONFIG low, and subsequently the Cyclone III draw the nSTATUS low....the qu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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Cyclone III handbook:

http://www.altera.com/literature/lit-cyc3.jsp

Table 9-7, pp169-170: PS mode MSEL[3:0] = 0000b for standard POR, and 1100b for fast POR.

Given that your device does not have MSEL[3] it must be one of the smaller packages.

Your setting of MSEL[2:0] = 001b is invalid, it should be 100b or 000b.

Cheers,

Dave

--- Quote End ---

Yes that is what I found in my search. The documents I was given and told to use were wrong. They are currently modifying my board now and I should know shortly.