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Contrary to rumors, the iPhone 15 has a standard, by-the-book USB-C port
(arstechnica.com)
This is a most excellent place for technology news and articles.
hardware doesn't have a fucking manual
they put a usb c controller on a iphone motherboard, what is there to read
I guess you could say, that the official USB-C specifications are the "hardware manual".
USB.org has a 373 page pdf on cable and connector specifications, to start with.