19/07/2004 15:01:53, "David Bisset"
<
david_bisset@itechnic.co.uk> wrote:
>Steve,
>Can we know what's currently on the PXA version, or in your
head...
>(delta from 2.05/2.06)?
Well, 2 days ago, the plan was a simple spin, adding a PXA255
and a kinder-to-software USB controller, plus rolling in any
bugfixes that were called for. However, Nick has put unclean
thoughts in my mind about PXA27X, and I'm very, very tempted.
It's 2 generations on, and it shows - I could ditch the external USB
controller and boot ROM, but I'd have to abandon the current
cheap&cheerful SDRAM and move to something low voltage - good
in some ways, annoying in others.
Some of the other PXA27X peripherals are pretty spiffy, too.
(Particularly taken by the MSL to avoid the need for shifting huge
busses around, and teh DMA controller now seems to be rather
more capable. The AC97 codec interface has a certain simple
charm - dunno if AC97 codecs come in low-power versions yet -
the last one I played with was a current hog)
Factors counting against the PXA27X are:
Software - the power control is pretty serious, and I know that the
SA1110 code doesn't always kick down as far as I'd like, and teh
peripherals are many and varied. There'll be fun beating the bugs
out of this. I'm not tracking the handhelds porting progress, on
whose shoulder
It's a big change. SA1110 to PXA255 was trivial(ish). The PXA27X
is, while still a SA1100 at heart, a substantial spin. The reference
schematic is 100 sheets, implying that I've got a heck of a lot of
reading. In fact, all the datasheets are massive.
At the moment, I'm tending towards the 27X, any comments from
the list?
Steve
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