wat is cell timing and how take the cell timing to the LIB?

[vamsi_addagada]

wat is cell timing and how take the cell timing to the LIB?

 

[onlymusic16]

Re: wat is cell timing and how take the cell timing to the L

Do you mean .lib contents?

Read out more on the propagation delay and transition times.

In short, You have a circuit. you simulate and find the delay numbers by applying a range of slew values at its input pins and a range of load values at its output pins. This is in the form of matrices inside the .lib file.

Is this what you wanted to know?

 

[au_sun]

Cell timings consist of
1. Propagation delay from the Input to the output pins, for various load capacitance and various input transition.
2. Output Transition time for various load capacitance and various input transition.

And also setup time and hold time for Flipflop .

these timing values are entered in a defined format called Liberty or any other format such as ALF.

 

[shavakmm]

Re: wat is cell timing and how take the cell timing to the L

standard cell characteristics are provided by fab vendor in the form of library