Hi
I've done a bunch of research and I find that most
compiler output seems to just use the F0*. Which
means that the fuses are left intact in the unused
rows. The way they are suppose to work by several
sources seems to indicate that this is not the desired
thing to do for power or speed.
I did see one that just left fuses connected that we
just in 3 of the column pairs towards the middle of
the array.
For power, I'd guess that blowing as many fuses as
one can would be best. For speed, I suspect it
has little effect because the lines are actually isolated
by a transistor in the arrays.
Since I am creating my own JEDEC file, I will just blow
as many as I can and not use the F0*. I suspect that
newer parts may recognize that the row is unused and
simply power it down. I doubt this is true for older
devices.
When I finally get around to blowing some, I may
do both and compare the current used. It only
takes a second to create either JEDEC file.
Dwight
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