Circuit and design structure for synchronizing multiple digital signals

摘要

Disclosed is a circuit configured to synchronize multiple signals received by one clock domain from a different asynchronous clock domain, when simultaneous movement of the signals between the clock domains is intended. In the circuit multiple essentially identical pipelined signal paths receive digital input signals. XOR gates are associated with each of the signal paths. Each XOR gate monitors activity in a given signal path and controls, directly or indirectly (depending upon the embodiment), advancement of signal processing in the other signal path(s) to ensure that, if warranted, output signals at the circuit output nodes are synchronized. In a two-signal path embodiment, advancement of signal processing in one signal path is triggered, whenever transitioning digital signals are detected within the other signal path. In an n-signal path advancement of signal processing is triggered in all signal paths, whenever transitioning digital signals are detected on at least one signal path.