3772 - Diamond / Spreadsheet View: How are the allowance and the percentage related in the Lattice Diamond tool's SSO (Simultaneous Switching Outputs) Analysis report? How to interpret the percentage with reference to allowance?

Solution:

The interpretation of the SSO (Simultaneous Switching Outputs) Analysis report for the allowance and the percentage columns is explained in this example:

Percentage is calculated as how many % of the Allowance value is the Total SSO.

Percentage=(100* Total SSO)/(Allowance Value)
The Pass/Fail status is given as:

Pass = (Allowance Value) > (Total SSO)
Fail = (Total SSO) > or = (Allowance Value)

Case 1: If Criteria is set to 800, Allowance % is set to 50%, and the Total SSO value is 300.
The Allowance value is calculated from the allowance percentage; 50% of 800 equals to 400.
Percentage is calculated as how many % of the Allowance value is the Total SSO:
Percentage=(100* Total SSO)/(Allowance Value) = (100*300)/(400) = 75%
The result is Pass, because Allowance Value (400) > Total SSO (300)

Case 2: If Criteria is set to 800, Allowance % is set to 50%, and the Total SSO value is 500.

The Allowance value is calculated from the allowance percentage; 50% of 800 equals to 400.
Percentage is calculated as how many % of the Allowance value is the Total SSO:

Percentage=(100* Total SSO)/(Allowance Value) = (100*500)/(400) = 125%
The result is Fail, because Total SSO (500) > Allowance Value (400)