Specifically which MCU that can boot Linux has the lowest operating power? I imagine it would be a low-clock arm, I intend to lower the clock further for my application. I'm hoping for less than 15mW at 3V, more like 5mW if at all possible. LCD controller preferable but beside that and IO lines no other options required.
Has any company come out with low-power series of 32-bit MCUs? I couldnt find them targetting any such market at the usual places, atmel, sharp, arm website.