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PATH COVERAGE




Path coverage represents yet another interesting measure. Due to conditional statements like if-else, case in the design different path is created which diverts the flow of stimulus to the specific path.


Path coverage is considered to be more complete than branch coverage because it can detect the errors related to the sequence of operations. As mentioned in the above figure path will be decided according to the if-else statement According to the applied stimulus the condition which is satisfied only under those expressions will execute, the path will be diverted according to that. Path coverage is possible in always and function blocks . Path created by more than one block is not covered. Analysis of path coverage report is not so easy task.




Path coverage report of the example:

Path 1 : 15,20 Not Covered
Path 2 : 15,21 Not Covered
Path 3: 15,22 Not Covered
Path 4: 17,20 Not Covered
Path 5 : 17,21 Covered
Path 6 : 17,22 Not Covered

Total possible paths : 6
Total covered path : 1
Path coverage Percentage : 16.67 (1/6)

Index
Asic Design
Bottle Neck In Asic Flow
Functional Verification Need
Testbench
Linear Testbench
Linear Random Testbench
How To Check The Results
Self Checking Testbenchs
How To Get Scenarios Which We Never Thought
How To Check Whether The Testbench Has Satisfactorily Exercised The Design
Types Of Code Coverage
Statement Coverage
Block Coverage
Conditional Coverage
Branch Coverage
Path Coverage
Toggle Coverage
Fsm Coverage
Make Your Goal 100 Percent Code Coverage Nothing Less
Functional Coverage
Coverage Driven Constraint Random Verification Architecture
Phases Of Verification
Ones Counter Example
Verification Plan

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