calculate maximum frequency propagation delay
Hi ,
There is no such maximum frequency specification for combinational circuits.
Rather we specify the propagation delay from each input pin to output pin .
In a real circuit scenario , most oftem combo logic comes in between -
1) flops
2) between input and flop
3) flop to output
4) input to output
in 1) we know the setup requirement and clk to q delay of flop
so that we can calculate the maximum frequency
2) we know the delay from input side and setup time of flop
3) Output timing requirement and flop clk to Q
4) Here we should know input delay and output requirement .
In summary max freq of a ckt depends on all these , flop chara combo delays ,
net delays and input/output timings ...