Unfortunately, there is not same kind of documentation (i.e KBA) for PSoC4 series as PSoC Boot Time.
There is one AN "AN60616 - PSoCR 3 and PSoC 5LP Startup Procedure"
Even though, this AN is described for PSoC3 and PSoC5LP, it can be same idea for PSoC4.
the startup from POR to main() function consists Hardware startup and Software (Firmware) Startup.
- Hardware startup usually has IMO stabilization. This is mentioned as the parameter Tstartimo in Datasheet.
- Software start-up - we don’t have any specific time as this depends on the configured CPU frequency.
So, the total start up time from POR to main() function cannot be defined specifically.