Posted on September 07, 2011 at 15:17http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/APPLICATION_NOTE/CD00270081.pdf
AN3193 says,
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/APPLICATION_NOTE/CD00270081.pdf Energy-efficient processing
The STM32L is built around the Cortex-M3, an industry standard 32-bit core, which has
been designed, among other criteria, for low power applications. The Cortex-M3 offers a
class-leading performance and code density. Although performance is not naturally linked
with low current consumption, it is a key benefit for most of the low power applications which
have to wake up periodically to execute software tasks. In this case, the Cortex-M3 spends
less time in Run mode due to its processing performance, thus maximizing the time in deep
sleep mode. If we consider only the processing consumption, expressed in mA/DMIPS
(DMIPS standing for Dhrystone MIPS measured using the public benchmark Rev 2.0), the
performance of the Cortex M3 is significantly better than that of the other architectures, in
particular 16-bit microcontrollers.
