--- In "cppbasvb" <> wrote:
> Can the compact flash slot support newer and faster compact flash
> cards?
> Will it be able to use the full speed of the newer cards?
> And does it support microdrives?
>
> Basically are there any limitations to the cf slot?
Our website http://www.embeddedARM.com runs on a single TS-7200 with
a 4GB Sandisk compact flash card which is currently the largest CF
out there. Even though some CF's are claimed as faster than others,
they all still use regular IDE as the interface.
The CF socket is wired in True-IDE mode and uses bus timing
compatible with the slow PIO modes. By default, the CPU will be
used in the Linux driver to suck data in from the 16bit data port
when data is ready, but speed could be increased by using the memory-
to-memory copy features of the ep9302 DMA controller unit.
Other limitations is that the CF is not hot-pluggable. The data-bus
is unbuffered from the CF and insertion/removal could cause a glitch
that could destroy an in-process SDRAM or flash access. However,
you could prepare for hot-plugging/deplugging by halting the
processer.
Microdrives will not fit mechanically in the slot, though I have
heard they will work if you have access to a file/dremel. We
generally don't recommend microdrives for any embedded application
due to their extremely high failure rate/low MTBF and high power.
IIRC, In constant-on operation their MTBF lasts less than a month.
Most applications of microdrives keep the devices powered-off and
spun-down most of the time.
//Jesse Off
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