[chbot] Looking for a micro

[Mark Atherton]

At first blush...

STM32F070F6P6TR 20-TSSOP US$0.62 @ 12,500 - https://www.digikey.com/products/en?keywords=497-17354-2-ND

48MHz 32 bit ARM M0, 32k FLASH, 6k RAM, I²C, SPI, UART, USB, ADC

Amazed that this part hits the US$1.08 price-point from Digikey in qty 100

May be in stock at Future in reels of 2500

Yee gads, where are we heading with this stuff, this is amazing price/performance.

-Mark


> On 08 January 2018 at 08:38 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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