Hi Joe, Thanks for your info. It's very interesting. Just curious, do you still have those flaky chips? I'll love to get some if you still have it. Best regards, WH Tan 2013/12/16 IVP > I'm using the 43K20 and struck just one problem > > I have Olin Lathrop's USBProgs. Olin knows his stuff re > programmers and I have confidence in his, and used them across > every PIC family, even in some quite demanding ICSP situations > > Out of a tube of 25, several wouldn't program reliably. Code > would go in once but not twice, rendering them useless > > Noting that these were Rev1 chips I sampled more, but they were > also Rev1, which cut off that line of investigation > > On the recommendation of Microchip Support I borrowed an > ICD3 and both upgraded Olin's code and tried the 43K20 that > were troublesome > > There was some improvement but there are still a couple that > are flakey with both an ICD3 and a USBProg > > Until I get chips that aren't Rev1 I can't be absolutely sure that > the early releases of some or all of this family are not perfect but > experience with two reputable programmers suggests they aren't, > and in the most annoying way. There's no work-around for not > being able to download code > > Joe > -- > --=20 WH Tan --=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 .