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Basic TDML Vocabulary (Continued)
Logical State Transitions
- A waveform shows the logical state changes of a signal that occur over time.
- Waveforms can represent the state changes on individual data signals, clock signals, or signal buses.
- Individual state changes on waveforms are called edges.
- TDML can contain the following information about an edge:
- The type of state change (high->low, low->high, invalid->valid, etc.)
The allowable states are: 1-high, 0-low, Z-tristate, V-valid, X-invalid, L-resistive low, and H-resistive high
- The time of the state change (earliest time, latest time)
- The speed of the state change (slope or slew rate)