Date: Thu, 24 May 2018 09:41:28 +0200 From: "H. Schmalzbauer - OmniLAN" <h.schmalzbauer@omnilan.de> To: Ravi Pokala <rpokala@freebsd.org>, Edward Tomasz Napierala <trasz@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r334115 - in head: share/man/man4 sys/dev/usb/template Message-ID: <fa8a13c4-c1ed-0b23-6c2e-3e23ecfe8137@omnilan.de> In-Reply-To: <9B0033E1-56EC-4CA0-BC28-056871B32B0A@panasas.com> References: <201805232006.w4NK64jS044384@repo.freebsd.org> <9B0033E1-56EC-4CA0-BC28-056871B32B0A@panasas.com>
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Am 23.05.2018 um 22:35 schrieb Ravi Pokala: > Hi Traz, > > You're referring to power consumption in terms of (milli)Amps. That's not right; power is measured in Watts. What you're actually talking about is *current*. And it looks like in some situations USB devices can draw more than 500mA. Since the voltage isn't a variable when talking about USB power, speaking of "power" while refering to current seems valid to me – it's 5 V only and those who read that don't even need to do any math in head. I never read 2500mW in USB world, 500mA is common. Just my 2¢ -harry
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