You can change the system frequency in the XN.
If you haven't already copied the XN into your local directory, do that, then for each node, find the Node node and add two attributes: Oscillator="20Mhz" and SystemFrequency="200Mhz".
(Unless you're running on an XC-2, in which case you should use Oscillator="25Mhz", or a custom board where you should set it appropriately).
For example:
Code: Select all
<Node Id="0" Type="XS1-G4B-FB512" Oscillator="20Mhz" SystemFrequency="200Mhz">
Your reference clock will remain at 100Mhz.
IIRC this feature is working in all the 9.2.X releases.
Best friends with the code fairy.