How to calculate library setup time and Hold timel?

[ramagandhi]

hello every one,

can any one explain about How to calculate library setup time and Hold time?



Thanks in Advance

RGR

 

[whenkey]

by using spice simulation the min delay (setup time) required between data and clock so that data is captured to output is calculated.

DATA __ __/```````\___
CLK _/``\__/``\__
OP _______/`````
for example, the simulation is done in number of steps by decreasing delay between data and clock. in each it verify the output (should be 1 in above case). in this way the min time between between clk and data pin gives the steup time.