slew propagation primetime
The analysis modes can be classified by different ways. The way timing arcs are calculated from clock arrival and Slew propagated across the path. Let me explain with PT as signoff tool. It may be applicable for other tools too, but not yet worked on timing sign off tools.
To make clear about this, let us consider the single OC also with BC-WC and OCV.
Single OC :
At Launch clock path: Late clock, max delay in clock path ,No derating and single OC.
At Data path : Max delay, Single OC,No derating.
At Capture clock path : Early clock, min delay in clock path, single OC. no derating.
slew propagation : max slew is propagated irrespective setup or hold.
BC-WC :
At Launch clock path: : Late clock,max delay in clock path, late derating,WC OC.
At Data path : Max delay, WC OC, late derating.
At Capture clock path : Early clock, min delay in clock path, WC OC. early erating
slew propagation : max slew is propagated during setup analysis and min slew propagted during hold analysis.
OCV :
At Launch clock path: : Late clock,max delay in clock path, late derating,WC OC.
At Data path : Max delay, WC OC, late derating.
At Capture clock path : Early clock, min delay in clock path, BC OC. early erating
slew propagation : During setup analysis, max slew for data launching path and min slew for data capturing path. During hold analysis, min slew for data launch path and max slew for data capture path.
Single OC is used before layout,since design was not extended for clock tree structure. BC-WC is recommended to test both corners after layout. but OCV will account more pessimisam to account for PVT variations across the die.
Hope you understood.
Regards,
Sam