[chbot] USB2 vs USB3 ports

[Charles Manning]

Perhaps I didn't explain properly... I meant the other way around:

plugging a development board (eg. CHIP/ RPi/whatever) into a PC for
software flashing etc. The dev board is a device.

eg. http://docs.getchip.com/chip.html#flash-chip-with-an-os

"If you are using a computer with USB3 ports, it’s suggested that you
attach a USB2-compliant hub and connect your CHIP to the hub, instead of
directly to the USB3 port."

I was under the impression that USB3 is a superset of USB2 allowing ALL
USB2 devices to work in USB3 slots.

Statements like those above suggest otherwise...



On Thu, Dec 8, 2016 at 8:00 AM, Mark Atherton <markaren1 at xtra.co.nz> wrote:

> http://www.slscorp.com/products/development-boards/usb-3-0-
> development-board.html
>
> Depends on the question you ask :)
>
> ---------
>
> The real answer may be that USB2 is almost ubiquitous in PC (and MAC)
> land, whereas USB3 is relatively new. Companies supplying dev-kits may be
> able to provide cheaper hardware, to a wider audience with USB2, unless
> there is a compelling reason that USB3 is required.
>
> Presumably USB3 will take over from USB2 in the fullness of time, but we
> are also at an interesting point in history where mobile devices are
> starting (?) to dominate the computing market. Not sure how a mobile device
> might implement USB3 OTG WRT to the increased power delivery requirement(?)
> of 5V/900mA.
>
> Anyway, just a thought...
>
> -Mark
>
>
>
> On 8/12/2016 7:32 AM, Charles Manning wrote:
>
>> I quite often see instructions for things like development boards to use
>> themwith USB2 port and not USB3 ports.
>>
>> Asked Uncle Google a few times, but I have yet to see a good reason why.
>>
>> Anyone know?
>>
>> Thanks
>>
>> Charles
>>
>
>
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