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?
I would love to use the chips at 1.62 volts with i.e. 2 AA batteries and the use of analog functions is a requirement for one of my projects.
I just got an Arduino Nano 33 IoT.
I know it comes with a couple of sensors, but I can't find specs on it regarding
deep sleep mode current consumption, etc.
I don't know the details of how much current consumption is regarding the built in USB and it would be nice to have it on the SAML10/11, but I'm getting by with a usb to serial converter on the Arduino Pro Mini.
Even without the power regulator and the power led on the Arduino Pro Mini, the lowest deep sleep mode with watch dog timer enabled is .0045 mA or 4500 nA based on the site below:
In terms of regular/idle/deep sleep mode aren't the Microchip processors a better option in terms of power usage?
Wireless application or not, if a battery were used wouldn't it last longer for a project application?
I've seen battery applications for various things online like weather stations, farming, long distance intermittent signal transmission, etc...
To put things into perspective I was expecting an option to keep the power led off on the Nano 33 IoT or even on the Nano Every in active mode. Can this be done while they are not in deep sleep?
I was powering the Nano 33 IoT via a 5V 100 mA solar panel and it was able to stay on with full sunlight, but I'm trying to power it with i.e. cloudy sunlight or morning sunlight. It either couldn't stay on, or the power led was barely flickering at times in such weather conditions. I used such a small panel for portability and small foot print reasons.
I don't have much experience with the the low power modes of the 328P but I've been trying to find a way to use the 3.3v Arduino Pro Mini at a lower voltage and clock frequency. With my current application I'm using 2 analog inputs and smoothing them 64 times.