On Dec 2, 2011, at 3:09 AM, Eric Smith wrote:
David Riley wrote:
(TI's Stellaris series has a built-in PHY,
but it's undesirable for a number of other reasons).
I've used TI/Luminary/Stellaris parts for several projects. What do you find
undesirable about them?
I don't find them generally undesirable (we've used them in projects, too), but
their voltage rails aren't as flexible. Perhaps I'm overthinking it (a result of
too many projects where the rails got out of hand).
I'm actually having a hard time remembering now what in particular I was thinking
about as far as problems with the Stellaris. Their ROMed drivers are a nice feature, and
the built-in PHY is pretty handy. I guess it's probably a result of too many
unfortunate interactions with TI's support on other projects. They have a nasty habit
(probably from experience, but still) of assuming that if you're asking for the
datasheet for something, you're going to be calling their engineers up for support all
the time.
We had an outdoor wildlife camera project where the requirement was booting from a cold
start and take a picture in under a second. Not entirely unreasonable if you're
running on bare metal. TI had one of their media processing chips with an embedded JPEG
engine, and I asked for the datasheet to that part (which was unreleased). They told me
to just "use the provided Linux driver", regardless of my protestations that
that wasn't really an option for something that needed to boot in a second.
Anyway, long-winded rant. The Stellaris parts are fine, I think I just have some negative
associations with TI support that color my thinking. :-)
- Dave