a simple question about the timing lib

[incol]

Dear everyone

I am studying a file of timing lib and there are some questions need your help.

In the program as follows, what does the data in the index_1 & index_2 mean? Do they mean rising time or loading capacitance? Thanks very much!

delay_model : table_lookup;
/* 2. Define template of size 3 x 3*/
lu_table_template(constraint_template) {
variable_1 : constrained_pin_transition;
variable_2 : related_pin_transition;
index_1 ("0.0, 0.5, 1.5");
index_2 ("0.0, 2.0, 4.0");
}
. . .

 

[oratie]

Hello,

Index_1 means Variable_1 = constrained_pin_transition.
And
Index_2 means Variable_2 = related_pin_transition.

So, both of them are transition time.

 

[incol]

ok, got it, thank you very much