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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

CVO frequency

I have a design that uses a CVO. This is in a Stratix III part. The User Guide states that the CVO should be able to run around 271 - 317MHz depending on it's configuration. I'm able to approach t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I added in the .sdc for the CVO and my worst case slack went from -1.468 to -0.259. So that's quite an improvement. Still not where I need to be but much closer. Sorry the .bmp doesn't show up very well.

From Node:

tx:InstTx|VipCvo:the_VipCvo|VipCvo_GN:auto_inst|alt_vip_IS2Vid:vipcvo|alt_vip_common_generic_count:v_counter|count[10]

To Node:

tx:InstTx|VipCvo:the_VipCvo|VipCvo_GN:auto_inst|alt_vip_IS2Vid:vipcvo|reset_counters

Is the worst case path.