The Nios® II Plug-In feature allows you to stop the program at the address you want to break and trigger SignalTapII at that address.
For details, please refer to the following application note.
(Reference) AN 446 "Debugging Nios II Systems with the SignalTap II Embedded Logic Analyzer"
https://docs.altera.com/v/u/docs/654956/debugging-nios-ii-systems-with-the-signal-tap-logic-analyzer-application-note
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Category:Nios® II
Tools:Quartus® Prime
Devices:-