Toggle Coverage is measured in percentage and is used as a quality standard to grade tests. The Toggle Coverage feature reports covered and uncovered nodes. Covered nodes are ones that have reached a switched threshold state. The uncovered nodes have not switched state. The user sets the number of state transitions monitored.
Input can be a list of nodes or a hierarchy level in the input file.
Full hierarchy scoping, specific level with or without sub-level recursive operation, is supported. Output lists can be covered nodes, uncovered nodes or both. Output of one run may be fed into the following run in order to eliminate redundant testing. Multiple uncovered results can be merged into one input file. Toggle Coverage verifies testbench quality and circuit testability Toggle Coverage usage falls into two modes.