K
Klaus Falser
Guest
Hello,
I have a rather large design for a XC95288XL which consumes 276 macrocells
of 288 possible.
Since Xilinx seems to prefer Coolrunner devices to the good old XC9500's
I tried to stuff the design into a Coolrunner II chip to look how it
would behave.
However, I was not able to make it fit even in a 512 macrocell device.
Timing should not be so tight, it has to run at 8 MHz clock, but the
timing analyzer gives me 17-18 MHz on the slowest 10 ns device.
Can anybody which know's the XCR2 better than me give me a hit where
to pay attention?
How can I see from the report where the fitter has a problem?
Thanky you very much
--
Klaus Falser
Durst Phototechnik AG
kfalser@IHATESPAMdurst.it
I have a rather large design for a XC95288XL which consumes 276 macrocells
of 288 possible.
Since Xilinx seems to prefer Coolrunner devices to the good old XC9500's
I tried to stuff the design into a Coolrunner II chip to look how it
would behave.
However, I was not able to make it fit even in a 512 macrocell device.
Timing should not be so tight, it has to run at 8 MHz clock, but the
timing analyzer gives me 17-18 MHz on the slowest 10 ns device.
Can anybody which know's the XCR2 better than me give me a hit where
to pay attention?
How can I see from the report where the fitter has a problem?
Thanky you very much
--
Klaus Falser
Durst Phototechnik AG
kfalser@IHATESPAMdurst.it