Mike Skinner

MCU Selection - S12 S12-XGATE

Discussion created by Mike Skinner on Nov 6, 2008
Latest reply on Nov 6, 2008 by Daniel Lundin
Hi all,
I am at present doing some forward thinking for a next generation of products.
Previously I have used HCS12 and HCS08 devices, and have code that is tested and ready for use in future products.
What I want to know is - which MCU family gives the best value / performance for money?
I am thinking the logical step is going to some of the XGATE devices - but how much faster are these than the "standard" HCS12 devices (specifically in terms of number crunching algorithms) and what is the sort of cost differential I can expect (i.e. not much / considerable)?
Are there any other gotchas I should be aware of (i.e. are XGATE devices better than HCS12 in every way, or has there been some compromise)?
Also, what is the compatibility of peripherals between HCS12 and XGATE (I'm thinking very good)?
Or would I get more value for money going to the cheaper end of the Coldfire architecture instead (it certainly seems that you get a lot of performance, to the point of having MAC and possibly even FPU at the upper cheap end) - and if so, how compatible are the HCS12 peripheral drivers I have already have in my toolbox of useful to Coldfire?
Or is there another alternative I've not considered?
Thanks for your help,