RE: Summary: Question on the fs choice (long)

Also make sure that the CPU reset signal is held low long enough after
power resumes so that it wont interfere if the power failure is less
than 100ms (or whatever the CF card needs to finish what it is doing)
(so make power-on-reset equal to 100ms...)

Regarding the hardware protection of flash chips on
power-down:  There's a circuit we used to use to protect
battery-backed RAM from this problem.  The basic technique is
to hold the CS high when the power falls below a certain
value.  See maxim-ic.com for chips that do this.  I think for
flash substituting a capacitor for the battery would
implement a similar function.

Just an idea, I don't know if anyone's actually tried it with flash...

Mark Chambers

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