Peter van Hoof wrote:
> Timothy J. Weber tw@timothyweber.org wrote:
>> Herbert Graf wrote:
>>>> Any other ideas for ICSP at 3V?  For now I'm pulling it and putting on a 
>>> ICD2, works perfectly for me with the 18F and 30Fs at 3.3V.
> 
>> OK, thanks.  I guess it's time to buy a new gadget then!
> 
>> ... and...
> 
>> ... ordered a clone from EBay that claims to go down to 2.0 V.
> 
> I'm not sure if you read my reply from a few days ago to the posting without
> the [PIC] tag so I'll repeat ti here:

Thanks very much - I forgot the tag, and then wondered why I didn't get 
*some* reply, forgetting that I filter on the tags myself!  Sorry.

> According to the Microchip website only with enhanced flash it is possible to 
> program at voltages below about 4.75 volt
> http://support2.microchip.com/KBSearch/KB_StdProb.aspx?ID=SQ6UJ9A003C0O
> both these devices have standard flash program memory there is only the option
> of programming it around 5 volt or replacing it with a device with enhanced flash.

Ah, good to know, thanks.  The 16F916 has standard flash, but the 16F886 
I'm transitioning to has enhanced flash - so there's another reason to 
use it that I didn't even think about!

And Vasile wrote in the tagless thread:
> I'm programming my PICs running at 3.3V using and ICSP at 5V.
> The PIC's VDD is isolated for the rest of the circuit by an active
> jumper (a transistor acting as a switch when ICSP connector is plugged
> in) and all other components connected to the PIC IO are 5V
> tolerant.CLK and DATA still need isolation through resistors.

Thanks, it's a good idea, and I'll keep it in mind.  I'm hoping to avoid 
having to complicate the circuit that much (not that it's a whole lot). 
  I think I have four lines that are 5V-intolerant - VDD to the XBee and 
three data lines - and I may just disconnect them with a DIP switch 
while programming until I can try the ICD2 at 3V.

Thanks all.
-- 
Timothy J. Weber
http://timothyweber.org
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