For anyone interested in the discussion and without knowledge of the ST ARM MicroControllers, this link is useful. http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1577 I'm using it to understand the differences between them With Warm Regards, Ivan Raul On Tue, Feb 4, 2014 at 1:44 PM, Antti Louko <alo@xxxxxxxxx> wrote: > Teemu Hakala wrote: > >> Originally we settled for 427, but 429 has crypto hardware, that >> might be nice. Regarding what I've said about magic numbers, both are >> magical in the same way. >> > > 429 doesn't have crypto. 437 and 439 have. > > /alo > >