Consider a embedded system such as Electro Hydraulic Power Steering ECU mounted in a heavy duty commercial truck.
When key switch is turned off, the ECU should executes very limited functionality in sleep. It is not suppose to log faults in sleep mode?
This article is meant to capture the path I followed when I was selecting an alternate small footprint, low-cost alternative to Adafruit’s Trinket.
In the past I’ve used Adafruit’s Trinket (https://www.adafruit.com/product/1500) and Trinket M0 (https://www.adafruit.com/product/3500) platforms...