You will have to do an analysis of startup times, like clocks (Fast IMO Dtartup Mode),
flushing A/D filters, etc.. This can be done via datasheets, module datasheet, and ap
Relative ap notes -
I can't find AN66803?
Since it will take a couple of ms to wakeup from sleep mode and having all clocks running again at nominal speed, I'm afraid that you will have difficulties to match your required timings.
You can also try the alternate active mode if waking up from sleep seems to take up a lot of time for your application.
is there any low power mode in PSoC to save maximum possible power?
Are you asking for the lowest power mode in PSOC 3? If so, it is Hibernate mode. Refer to AN77900