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The Signal API defines classes and interfaces for the modeling of side-band signals such as interrupts.
There are two variants:
The Signal API features immediate propagation of the signal state (no update phase or time elapse) and does not require intermediate storage of the signal state in a channel.
The Signal classes and interfaces feature a
STATE template parameter.
sc_signal<>for side-band signal modeling at PV level. The SystemC
sc_signal<>is implemented as a primitive channel using the request/update mechanism. This introduces extra processes, resulting in extra delta cycles in the simulation, and prevents immediate propagation of the signal state.