Hi!,

On Mon, May 25, 2015 at 9:09 AM, Isaac Marino Bavaresco
<isaacbavaresco@yahoo.com.br> wrote:
> I think it is hardly justifiable to use 8-bit microcontrollers anymore.
>
> ATMega328: 8-bit @ 20MHz, 2 kiB RAM, NO USB =3D US$3.25 @ 1, US$1.63 @ 10=
00
>
> PIC32MX110F016B: 32-bit @ 40MHz, 4 kiB, NO USB =3D US$2.50 @ 1, US$1.73 @=
 100
> PIC32MX210F016B: 32-bit @ 40MHz, 4 kiB, USB OTG =3D US$2.69 @ 1, US$1.86 =
@ 100
>
> ATSAM3U1CB: 32-bit @ 96MHz, 20kiB RAM, Hi-Speed USB device =3D US$5.71 @
> 1, US$2.85 @ 1000
> ATSAM3S1BA-AU: 32-bit @ 64MHz, 16kiB RAM, USB Device =3D US$4.66 @ 1,
> US$2.33 @ 1000
>

I agree with Russel that the real value in the Arduino compatibles is
the *huge* library
of useful code out there. It is that level of code re-usability what
drove the Arduino were
it is now.

But if you want developing a product, cheap 32bit microcontrollers are
here to stay, and
as you say there is little need to use 8bitters anymore. My picks:

The STM32 line, where the lowest price is:

STM32F030F4P6TR: 32-bit @ 48MHz, 16k flash, 4k RAM, US$1.45@1, US$0.89@100
(also available at less than US$0.8@10 on ebay).

The PSOC4 line, where you can find:

CY8C4013SXI-400: 32-bit @ 16MHz, 8k flash, 2k RAM, US$0.61@1, US$0.5@100

I like the PSOC4 5V compatibility, with internal 1.8V regulator, makes
interfacing with old
electronics really easy. Also, the bigger parts have 2 or 4 internal
CPLDs, with 8 macrocells
each, capable of implementing logic functions independent of the ARM core.

And I like the STM32 availability and good amount of reusable code in
the net, and Linux
support for the tools.
--=20
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