Re: Low-cost low-pin count MCU with USB Host support

From	rickman <gnuarm@gmail.com>
Newsgroups	comp.arch.embedded
Subject	Re: Low-cost low-pin count MCU with USB Host support
Date	2016-06-16 20:13 -0400
Organization	A noiseless patient Spider
Message-ID	<njvfbb$c29$1@dont-email.me> (permalink)
References	(9 earlier) <njrku5$d82$1@reader1.panix.com> <4fm3mblrv46nd92he2igemhobb9n9jinvr@4ax.com> <njtbns$4p8$2@reader1.panix.com> <0ti5mbpufd8gkrre7t1993vk0eopdcmk9n@4ax.com> <576332e4$0$27607$c3e8da3$fdf4f6af@news.astraweb.com>

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On 6/16/2016 7:14 PM, Clifford Heath wrote:
> On 17/06/16 02:27, Robert Wessel wrote:
>> On Thu, 16 Jun 2016 04:59:40 +0000 (UTC), Grant Edwards
>> <invalid@invalid.invalid> wrote:
>>> Well, I would have chosen "1.5 meg" and "12 meg".  But that's just me
>>> be silly.
>
> Was another name even needed? They're already called USB 1, 2, 3, so why
> not just refer to the speed by the standard version that introduced it?

That is a problem we still have.  Saying a device supports USB 2.0 does 
not mean 480 Mbps.  It may be 12 Mbps or even 1.5 Mbps.  Each revision 
of the standard provides for multiple speeds which each have names.


>> I was helping someone buy an air compressor a couple of weeks ago.
>> Air-powered tools have two parameters for the compressed air source -
>> a required pressure, and a required volume of (compressed) air
>> (usually PSI and SCFM in the US).
>
> Yep, that is dopey. Should be power (watts) at pressure, for continuous
> use, since that reflects the actual requirement.

Except if you are building and using these things you can measure PSI 
and perhaps airflow, it's harder to measure the output in watts.


>> I can sympathize with the manufacturers - they're not wanting people
>> to buy tools that won't work, but there doesn't appear to be a simple
>> (enough) way to communicate the requirements, that remains reasonably
>> accurate.
>
> Clifford Heath
>


-- 

Rick C

Thread

Low-cost low-pin count MCU with USB Host support pozz <pozzugno@gmail.com> - 2016-06-07 00:00 +0200
  Re: Low-cost low-pin count MCU with USB Host support Tim Wescott <seemywebsite@myfooter.really> - 2016-06-06 18:11 -0500
    Re: Low-cost low-pin count MCU with USB Host support pozz <pozzugno@gmail.com> - 2016-06-07 09:04 +0200
      Re: Low-cost low-pin count MCU with USB Host support Jack <jack4747@gmail.com> - 2016-06-07 05:49 -0700
        Re: Low-cost low-pin count MCU with USB Host support pozz <pozzugno@gmail.com> - 2016-06-07 22:59 +0200
      Re: Low-cost low-pin count MCU with USB Host support Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2016-06-07 18:39 +0000
        Re: Low-cost low-pin count MCU with USB Host support Espo <spam@spam.com> - 2016-06-14 21:39 +1000
          Re: Low-cost low-pin count MCU with USB Host support Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2016-06-14 18:09 +0000
            Re: Low-cost low-pin count MCU with USB Host support rickman <gnuarm@gmail.com> - 2016-06-14 16:18 -0400
              Re: Low-cost low-pin count MCU with USB Host support raimond.dragomir@gmail.com - 2016-06-15 04:19 -0700
                Re: Low-cost low-pin count MCU with USB Host support Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2016-06-15 12:57 +0000
                Re: Low-cost low-pin count MCU with USB Host support Grant Edwards <invalid@invalid.invalid> - 2016-06-15 13:24 +0000
                Re: Low-cost low-pin count MCU with USB Host support raimond.dragomir@gmail.com - 2016-06-15 07:28 -0700
                Re: Low-cost low-pin count MCU with USB Host support Robert Wessel <robertwessel2@yahoo.com> - 2016-06-15 17:46 -0500
                Re: Low-cost low-pin count MCU with USB Host support Grant Edwards <invalid@invalid.invalid> - 2016-06-16 04:59 +0000
                Re: Low-cost low-pin count MCU with USB Host support Robert Wessel <robertwessel2@yahoo.com> - 2016-06-16 11:27 -0500
                Re: Low-cost low-pin count MCU with USB Host support Clifford Heath <no.spam@please.net> - 2016-06-17 09:14 +1000
                Re: Low-cost low-pin count MCU with USB Host support rickman <gnuarm@gmail.com> - 2016-06-16 20:13 -0400
                Re: Low-cost low-pin count MCU with USB Host support Robert Wessel <robertwessel2@yahoo.com> - 2016-06-16 22:57 -0500
                Re: Low-cost low-pin count MCU with USB Host support rickman <gnuarm@gmail.com> - 2016-06-15 10:48 -0400
          Re: Low-cost low-pin count MCU with USB Host support pozz <pozzugno@gmail.com> - 2016-06-15 08:39 +0200

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