I'm interested in running a pi 0w on a computer USB port with power running through an arduino that acts as a USB device. I could add a transistor to turn on PI when arduino finishes USB enumeration so it could receive 500mA. But instead, if there is a setting I can enable to hold pi in a kind of reset/powered down mode by applying 0V or 3.3V to a pi pin, that would be easier. I know there's an overlay to shut down pi if a certain pin is set or reset. What about a general reset pin like a microcontroller? Will the shutdown pin overlay keep the pi in a shutdown state that won't generate a spike on the USB power rail? Thanks.
Arduino data loggers, user interface, printed circuit board designer since 2009, RPI 3B 2B 2B Zero Jessie, assembly/C/C++/java/python programmer since the 80's