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Altera_Forum
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8 years ago

(Avalon-MM) identical slave outside master's address range (??)

Hi all, In short: I have two identical interfaces, but Qsys tells me the slave is outside the master's address range. I don't understand what's going on and why they would be different. Both ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Just an update. Daixiwen (post# 5 at http://www.alteraforum.com/forum/showthread.php?t=33226) has a really good short explanation of addressing.

In addition, I just found out (after a couple months of looking into this) that what I was doing is illegal...that's why the behavior seemed odd. All my other interfaces (32b and 64b) with exact matching Master-Slave data widths are able to connect without problem, except this 144-bit one. As per the Avalon -MM specification, however, data widths must be a power of 2 (from 8 to 1024)!