From what I've been able to gather, this is best done by pulling the RESET pin low for a minimum of 100us.
So my project is set-up to make this happen but I'm having intermittent problems where the chip does not emerge from the reset trigger signal in a stable condition.
I've tried pulling GPIOs 0 and 2 high, but this has not completely fixed the situation.
What additional steps can I take to ensure that the chip boots up stably from deep sleep?