I really wish the Arduino Team will look into using the Microchip family of processors.The links below describe the features they have as well as the power usage specs.https://www.microchip.com/design-centers/lowpower/products/32-bit-low-power-mcus
Low-Power Sleep Modes and Operating Voltage Active mode current down to 25 μA/MHz Deep sleep current down to 100 nA SRAM retention (40 KB) down to ~1 μA 1.2 μs wake-up time from idle state Fully operational down to 1.62V while still maintaining all functionality, including analog functions Highest certified ULPMark™ score for any Arm Cortex-M23 or Arm Cortex- M0+ class device; SAM L11 MCU achieved ULPMark score of 410
These are the specs for the 32 bit Microchip processors. It seems their deep sleep mode is better than the 328P no?
DDIN = 1.8V, CPU is running on Flash with three wait states
Where on the ATmega328P sheet does it say that it can run off of 1.8V?I couldn't find it.http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf. . .
@1.8V, highest current consumption I can find is 5.2 mA, CPU running a CoreMark algorithm
without putting it to sleep using really low amounts of power.