Freescale Shrinks World’s Smallest ARM-Based MCU by 15%

In comparison Atmels use of IoT in that case seems more justified by the fact that they are marketing a solution with network connectivity. And imho the integration of connectivity and microcontroller is far more significant than 15% reduction of already ittybitty package size.

http://www.ti.com/ww/en/launchpad/launchpads-tivac-ek-tm4c12...

Hell, at that price, you can afford to do stupid shit with them, like put them in your friends' LED lightbulbs to screw with them, or build a physical neural-network computer, just so you can hook up LEDs between all the interconnects and make a blinklichten display.

The only problem is that they are ball grid array devices. I wouldn't necessarily say that BGA is impossible for a hobbiest, but typically you're just not going to find that kind of equipment at your local hackerspace.

It even works with the Mbed system, so you don't need to worry about setting up a compiler environment becuase you can do it all online (unless you want to - it works with GCC)

http://mbed.org/handbook/mbed-FRDM-KL25Z

http://mecrisp.sourceforge.net/

  void setup_code() {
    // configure SPI
    // analog to digital converters
    // timers
    // fix internal and external buggy hardware
  }

  void interrupt_handler() {
    TURN_OFF_INTERRUPTS;
    // packet recv
    // time expired
    // etc
    TURN_ON_INTERRUPTS;
  }


  setup_code();
  register_interrupt_handler(interrupt_handler);
  while(1) {
    // application code
  }