Gang programming with ICD

Heliophagus · Joined: 30 Oct 2008 Posts: 4

If I need to program 4 PICs on a circuit board, all of which run the same program, it would be convenient to have them all share one pullup to VCC and to share their PIN_B6 and PIN_B7 lines. This would allow them all to be programmed in parallel, at least in theory. Would this approach work with the CCS ICD? Has anyone tried this approach?

Heliophagus · Joined: 30 Oct 2008 Posts: 4

Either what I want to try is clearly impossible, so no-one has replied, or it is obviously possible, so no-one has replied. I'd really appreciate some input on this, and have tried doing Google searches on this subject without coming up with information relevant to the CCS programmer. Please help - I'd really appreciate it.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

The best way to find an answer is to go to the Microchip forum search page:
http://forum.microchip.com/search.aspx
In the Search Term box, type in:

FvM · Joined: 27 Aug 2008 Posts: 2337 Location: Germany

Considering the fact, that at least PGD is a bidrectional pin, the intended method should be expected not to work reliable. In the case, that one device has a different output state than others, the combined result is short circuit respectively undefined. The method may work anyway when accepting some restrictions, but most likely won't ever be suggested by Microchip. It's also questionable if any programmer has been designed to drive a respective load and if will endure this operation without damage.