-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Wouter van Ooijen wrote:
|> | How often do you need to verify program memory at Vdd limits?
|>
|> ... like the $35 PK2 can?
|
| It can, but only when both extremes of Vdd are well below the voltage
| level of the USB but, which can be below 4.5 V. I would not call that a
| true 'production' grade programmer.
|

Agreed, it only applies if you know your particular USB port provides
enough voltage to meet the extremes of the target chip's VDD range.

That said... anyone up for making a tiny circuit (I'm thinking, around
the size of a flash stick) that plugs into a USB port and has a little
tiny switching boost regular, plus maybe a linear, and brings whatever
you have on the port up to a perfect 5V? Then you'd just plug a regular
USB cable into the other side of the circuit. You could market it at EEs
as a way to stabilize voltage so you can use cheap programmers like the
PK2 (perhaps sell an adjustable-voltage version for testing USB
functions at both legal extremes of Vbus?), and also market it at the
general public as a cheap way to get an expensive, not-quite-legal USB
function to work with an expensive, not quite-legal USB host.

It probably wouldn't be legal USB though, for connector reasons as well
as current reasons (standby would be annoying?)

Chris
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)
Comment: GnuPT 2.7.2
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkieUfwACgkQiD2svb/jCb5/fgCgpX++xNGBFP8ktlMd/q440YqH
j8AAniBtZyvJ2SsYIzAeYmjwpKCmTFOM
=gH63
-----END PGP SIGNATURE-----
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist