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Wake-up from Deep Power-Down mode causes a reset in LPC1768

Question asked by Mosi Yaghi on Dec 5, 2016
Latest reply on Dec 9, 2016 by Mosi Yaghi

I need to minimize the current consumption in my board which uses a LPC1768. Now I don't have any problem with going into Deep Sleep or Power-Down modes and waking up from those modes. I have configured the RTC to generate an interrupt after some predefined time which does wake up the MCU correctly and works just fine. 

My problem occurs when I want to go into Deep Power-Down mode which is precisely what I need (its consumes much less power). But after generating the RTC Interrupt the MCU goes into a reset state and starts the execution from the beginning as if someone pushes the reset button !

Now why is that? I read from the documents (like this one: AN10915: Using the LPC1700 power modes | ) that these three routines are pretty much the same. 

I really need to do this.