Christopher, Good to know programming is reliable at 3.3V in your case - did you happen to work at 3V sharp with same results? Ariel Rocholl On Wed, Mar 12, 2014 at 5:24 AM, Christopher Head wrote: > On Tue, 11 Mar 2014 12:21:19 +0100 > Ariel Rocholl wrote: > > > The microchip programming specification for these parts is 3.0-3.6V > > (parameter D111 on DS70619B document) with an instantaneous current > > during programming of 200mA (parameter D114). Looking into the errata > > for these parts does not mention anything regarding programming > > voltages that could lead to think this is a known issue. > > I have an application using a dsPIC33EP powered by 3.3 volts from the > application circuit. I use a PICkit3 for both programming and > debugging. It's a bit flaky, but not in the way you > describe--programming is always pretty reliable, but debugging can get > locked up in a weird state once in a while that requires unplugging the > PK3 from USB to get things back on track. I never really associated > this issue with supply voltage though; it seems to be more a code > issue, failing when the program counter runs off the end of code or > does something else weird. It always works fine for either purpose from > a fresh startup though. > -- > Christopher Head > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .