Construct the simplest configuration and validate current consumption.
AKA divide & conquer...

On 4/7/2013 7:29 AM, veegee wrote:
> On 2013-04-06 9:47 PM, Spehro wrote:
>> A signal generator or other separately powered device connected to any i=
nputs?
> Can't believe I overlooked this one; I have a REAL ICE connected to one
> of the microcontrollers at all times. The VPP/MCLR, VDD, VSS, PGD, and
> PGC pins are connected. The VPP, PGD, and PGC pins aren't connected to
> anything else other than their respective microcontroller pins, and
> they're all high-Z inputs so I'm guessing they should be isolated CMOS
> inputs? Practically, I have a strong feeling they're not isolated
> inputs. Or am I mixing up isolation with MOSFET insulated gates?
>
> Could it be possible that a high voltage signal introduced on the VPP
> line during programming somehow propagates through the microcontroller?
>
> Or some other transient signal coming through the REAL ICE VDD/VSS line?
>
> Shouldn't the REAL ICE be protected/protecting against this kind of stuff=
?
>
>

--=20
John Ferrell W8CCW
To steal ideas from one person is plagiarism.
     To steal from many is research.


--=20
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