Re: [partial-reconfig] BUFG and DCM constraint help

[Ashok Verma <ashokv@xxxxxxx>]

"Where to LOC", very much depends upon the rest of the constrains. In 
general you can ...
1) Run without any LOC constrain
2) Open the placed/routed design
3) See if placing the DCMs somwhere else helps. (By analysing routing 
for the clock-out from the DCM)....

--
Ashok



Ye Zijia wrote:
> Hi all,
>         can someone tell me how do i know where can i constraint the DCM 
> and BUFG components i have for my design ? I am using virtex 2 pro 
> (xc2vp4fg256-5).  I have these in my constraint files but i have no idea 
> where i can constraint them to. Could not find anything in the data sheet.
>
> INST "U_DCM" LOC = ??; componenet DCM
>
> INST "U_DCM0" LOC = ??; componenet DCM
>
> INST "BUF_2" LOC = ??; componenet BUFG
>
> INST "OBUF_3" LOC = ??; componenet BUFG
>
> INST "OBUF_4" LOC = ??; componenet BUFG
>
> Also, do i need to apply constraint for IBUFG , IOBUF, OBUF components 
> too or just DCM and BUFG components need to be constrainted ? The 
> application note just mention DCM and BUFG components.
>
> Thanks for your time !
>
> Regards,
>
> Zijia
>
>
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