Path: ...!weretis.net!feeder8.news.weretis.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Carlos E.R." Newsgroups: sci.electronics.repair Subject: Re: USB functionality. Date: Wed, 13 Mar 2024 14:47:00 +0100 Lines: 35 Message-ID: References: <2219572717.2fe80b82@uninhabited.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net y6kRwb4XKVPoQw4HKmZluAH4qHmm0oAfAQVKh8NdXfLwgmjKWQ X-Orig-Path: Telcontar.valinor!not-for-mail Cancel-Lock: sha1:b71CTencXbQspbvXmXY9fql6n6M= sha256:xpiMC0+FoNxvtaFAw7r9s3YOpkrfK70N3jzSsRw324s= User-Agent: Mozilla Thunderbird Content-Language: es-ES, en-CA In-Reply-To: <2219572717.2fe80b82@uninhabited.net> Bytes: 2344 On 2024-03-09 23:09, Roger Hayter wrote: > On 9 Mar 2024 at 21:54:51 GMT, "Andrew Smallshaw" wrote: > >> On 2024-03-09, peter@easthope.ca wrote: >>> >>> This photo, >>> https://commons.wikimedia.org/wiki/File:USB-OTG_Setup_IMG_2342.JPG >>> suggests, to me at least, that the phone can be charged while the >>> keyboard, mouse and flash store are used. True? >> >> There are altogether too many unknowns here. Looking at the date >> of the photo - 2015 - some phones of that era could support USB >> OTG but were unable to supply power to connected peripherals, >> meaning you would need a Y cable to supply that separately. Others >> could do the job inclusive of power delivery, others couldn't work >> in OTG mode at all. Generally you couldn't use OTG and charge >> simultaneously, it's a role reversal that early USB wasn't designed >> for. >> >> Things are different with USB-C but of course that is much later. > > But can even USB-C accept a signal input (keyboard and mouse for instance) and > unrelated signal output (audio for instance) on the same physical socket? I > ask only out of curiosity. Certainly. That's normal USB functionality. It is a bus. You need a hub, though, in order to split the cables, one for each device. The only problem is which device supplies the power and in what direction. -- Cheers, Carlos.