ARM's Cortex M: Even Smaller and Lower Power CPU Cores
 

ARM (and its partners) were arguably one of the major causes of the present day smartphone revolution. While AMD and Intel focused on using Moore’s Law to drive higher and higher performing CPUs, ARM and its partners used the same physics to drive integration and lower power. The result was ultimately the ARM11 and Cortex A-series CPU cores that began the revolution and continue to power many smartphones today. With hopes of history repeating itself, ARM is just as focused on building an even smaller, even lower power family of CPU cores under the Cortex M brand.

http://www.anandtech.com/show/8400/a...ower-cpu-cores