[chbot] Looking for a micro

[Charles Manning]

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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