Do all the Vertex DCM outs use same global clock tree?

[Kelvin @ SG]

Hi, there:

Assume my chip uses the CLK180 and CLK90 at same time, does it mean CLK180 &
CLK90 uses
the same global clock tree? Or, do I need to instantiate a BUFG for each of
them?

Best Regards,
Kelvin

 

[Austin Lesea]

Kevin,

Yopu need a separate BUFG for each. All BUFG resources are matched, so
that the skew specs apply at the end of a BUFG, not at the output of the
DCM.

Austin

Kelvin @ SG wrote:

Hi, there:

Assume my chip uses the CLK180 and CLK90 at same time, does it mean CLK180 &
CLK90 uses
the same global clock tree? Or, do I need to instantiate a BUFG for each of
them?

Best Regards,
Kelvin