I have a circuit for an 8051 type microprocessor which executes a 1 minute program and then shuts down completely. I would like to then have a touch switch which resets the power supply to begin execution again. I find that cutting the power supply and then re-connecting the power supply works, but I need to cut the power supply for about 30 seconds before it will reset.
Since I want the battery to last a long time (e.g. a year or more), I would like to take this shutdown approach rather than an interrupt approach. But, I would also like to use a touch switch to reset rather than a hard off/on toggle switch.