Query on Latch/ICG timing

[mvasanth]

Hi all,

I have two questions :

1). We know about the time borrowing from a latch, so is the borrowing inferred during timing analysis by the tool or inference comes from a lib?

2). Similarly we know that a clock gating cell is made up of a latch and an combo gate, so can time be borrowed from the ICG as well?


Thanks in advance for your responses.
mvasanth

 

[srp8514]

HI,

1. Time borrowing needs to be enabled by the user .libs have no information about time borrowing. The tool understands the a latch based design and if time borrowing is enabled then it will optimize the design accordingly depending on the combo logic between the two latches
2. Yes time borrowing can be implemented for ICGs as well.

srp8514