> > * Turned on +12V, +5V (actually more like 3.6V - 3xAA
> rechargable), but programming datasheet says this is fine)
>
> Not sure I understand this. I thought the data sheet said 5V
> VDD should be used for programming mode.

AFAIK the whole oparting Vpp regange is OK for programmaning, *except*
for bulk erase (which is the only way to get rid of code protectyion, so
a programmer can't do without it). So unless you are sure your chips
will not be code protected better stick to the narrower Vdd range (I
think 4.5 .. 5.5 Volt).

Wouter van Ooijen

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