[partial-reconfig] questions about the "four-slice boundary" limitation

["guhaiyun" <guhaiyun@xxxxxxxxxx>]

Hi,everyone:

     My name is echo, I am from China. I have some questions to ask you:

     1. In the xapp290, it is said that "the number of slice columns divided by four is 
the only real limit to the number of defined reconfigurable module regions." but what is the reason?

     2. In the DPRTutorial, it suggested "the boundary between two modules is placed on 
an even column(e.g. C19->C20)", is that considering that each Sprtan II CLB contains two 
slices(not four)? But 19 is not an even number, i am really confusing.

     3. I have completed several examples, the target device is Virtex FPGA whose CLB 
also contains two slices, and no matter the boundary is placed on even or odd column, it 
is all right.

     4. sometimes when I changed the package type of the device, the result will be different,for example, if i use "fg456xcv300", the result is correct, when i just change the package to "bg432xcv300", there will be errors in par. I don't know why?  
    
     thanks a lot!
  

　　　　　　　　

　　　　　　　　echo
　　　　　　　　guhaiyun@nju.edu.cn
　　　　　　　　　　2005-06-21



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