Ormund Williams wrote:
>
> I had considered that chip for a project but needed an LCD
> controller more than I needed the Ethernet MAC so I went with
> the LH77790 from Sharp.
You too, huh?
> The 77790 also uses the ARM7 core so a port to either should
> work on both chips.
One reason I've ruled it out, even though it's such a fine chip,
is that the 77790 MMU does not have anywhere near the MMU
abilities I need for Linux.
For example, doing execute-in-place requires either some extremely
tricky run-time relinking, or some sort of mechanism to map
logical addresses to physical addresses. The granularity of this
should be a page of some size between 256 and 4K bytes, which
implies being able to have an unlimited number of pages.
There are only 8 pages in the LH77790, and I can't see a way to use
this ability to advantage.
I'm hoping its more powerful brother, the LH79402, will have this
ability.
Now, if only there were a chip with an ARM7 core, preferably TDMI,
an LCD controller, and some A/D/A. 4Mbps (like the 79402) would
be nice as well.
Does anyone know of such a chip?
Regards,
Mitch.
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