|  | Three Module Example  |  | 
| Event | Time | Description | 
| 1 | 0 ns | Source places token on A | 
| 2 | 5 ns | Delay places token on B | 
| 3 | 5 ns | Sink acks token on B | 
| 4 | 5 ns | Delay acks token on A | 
| 1 | 10 ns | Source places next token on A | 
Copyright University of Virginia Center for Semicustom Integrated Systems. Reprinted with permission.
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