Seconding and thirding the LVP pulldown -- 10k resistor from PGM pin to=20
ground.  I've found the 16F pins to be very demanding about this.  The=20
18F's don't seems to require it.

Cheers,
-Neil.


On 7/19/2017 3:04 PM, Sean Breheny wrote:
> Pulling a few things from the dark recesses of my memory:
>
> Despite being an LF chip, maybe it needs 5V for programming? Or maybe it
> cannot operate at 5V and needs 3.3V?
>
> Also, is this one of those chips which had a low-voltage programming meth=
od
> and needed a pin (called LVP?) pulled high or low to ensure proper
> operation of the normal ICSP method?
>
> Sean
>
>
> On Wed, Jul 19, 2017 at 1:32 PM, Van Horn, David <
> david.vanhorn@backcountryaccess.com> wrote:
>
>> Still having no luck.
>> I got some fresh F73 parts from Digikey, and the programmer looks like
>> it's unable to communicate with the chip.
>> Is there a wiring guide that covers this specifically?   I need a known
>> working starting point.
>>
>> Sometimes, doing someone a favor is way more complicated than it looked.
>>
>>
>> --
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