> > I think that might fail on a 16C84 when the USB power is at
> > the lowest level allowed by the spec.

> K128 only programs chips from the chipinfo file that are
> listed as F series.

OK, disregard the 16C84. The level at which a 16F84(A) will switch to
programming mode is specified as 12 .. 14 Volt, which I interpret as 'no
chip will enter below 12, all chips will enter below 14'. So you need 14
for reliable programming, which is more than 3 times the lowest voltage
you can get from USB (plus you will have some loss in the diodes). In
practice this won't be a big problem since most people use powered hubs,
and most chips enter prog mode below 13 V, but IMHO it is still a design
flaw. Note that my own Wisp628 is not entirely off the hook on this
aspect either.

Wouter van Ooijen

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