[chbot] Looking for a micro

[Michael Hope]

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
>
>
>
>
>
>
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