[chbot] Looking for a micro

Michael Hope michaelh at juju.net.nz
Sun Jan 7 22:04:39 GMT 2018


Ah, sorry.  The ATSAMD21G15B does but it's $1.07.  It can run at USB full
speed without a crystal but I haven't tried it.

-- Michael

On Sun, 7 Jan 2018, 22:47 Charles Manning, <cdhmanning at gmail.com> wrote:

> Thanks Blokes
>
> For me the STM32F0x2s are still winning over other STM32F070 because they
> don't need a crystal - even for USB.
>
> I see that the Kinetis devices from NXP seem to support crystal-less USB
> too. Anybody played with those?
>
> Michael: the ATSAMD21E15A/B don't seem to have USB.
>
> Any more candidates?
>
> Thanks
>
> Charles
>
>
> On Mon, Jan 8, 2018 at 10:35 AM, Michael Hope <michaelh at juju.net.nz>
> wrote:
>
>> I'm enjoying porting Zephyr to the SAMD series that's also used in the
>> Arduino Zero.
>>
>> If I've read it right, the ATSAMD21E15A with 32 k flash is 0.48 / 100 at
>> Digikey.
>>
>> On Sun, 7 Jan 2018, 20:39 Charles Manning, <cdhmanning at gmail.com> wrote:
>>
>>> Happy New Year y'all!
>>>
>>> A new year, a new project.
>>>
>>> I need a supervisory micro for an FPGA-based system. It needs to be:
>>> * Low cost (sub $1US @10k).
>>> * USB device + UART. It will make a CDC class "virtual comm port".
>>> * Low cost (sub $1US @10k).
>>> * A few GPIOs for LEDs + switch + controlling main power supply to turn
>>> on FPGA.
>>> * Low cost (sub $1US @10k).
>>>
>>> Other engineering driven requirements:
>>> * ARM Cortex M0/3. Life's too short to mess about with esoteric tool
>>> chains and instruction sets.
>>> * Small  footprint.
>>>
>>> So far my eye is drawn to the STM32F042 which is all of these and it
>>> seems does not need a crystal making for even more cost + board space
>>> saving.
>>>
>>> Anybody got other options?
>>>
>>> Thanks
>>>
>>> Charles
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>>> https://lists.ourshack.com/mailman/listinfo/chchrobotics
>>> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>>> Meetings usually 3rd Monday each month. See http://kiwibots.org for
>>> venue, directions and dates.
>>> When replying, please edit your Subject line to reflect new subjects.
>>
>>
>> _______________________________________________
>> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>> https://lists.ourshack.com/mailman/listinfo/chchrobotics
>> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>> Meetings usually 3rd Monday each month. See http://kiwibots.org for
>> venue, directions and dates.
>> When replying, please edit your Subject line to reflect new subjects.
>>
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ourshack.com/pipermail/chchrobotics/attachments/20180107/3d7c4c8a/attachment.html>


More information about the Chchrobotics mailing list