| 摘要 |
<p>PURPOSE:To simply calculate the clock skew between two FF by providing a clock skew calculation means and a skew table containing the clock skew values corresponding to the 1st-n-th hierarchies respectively. CONSTITUTION:The skew values corresponding to each hierarchy are written into a skew table 6. When the calculation of skew value is desired between the clock input pins A and B, an operator supplies the clock paths CLKA1, CLKB1 and CLKC1 of the pin A and the clock paths CLKA1, CLKB2 and CLKC3 to clock skew calculation means 5. The means 5 checks the coincidence or discordance successively at and after the branch path name belonging to the 1st hierarchy and then outputs the clock skew value of the i-th hierarchy of the table 6 in case no coincidence is obtained between branch path names of both pins A and B in the i-th hierarchy.</p> |
