On Tue, 12 Nov 2002, Micro Eng wrote:

*>In addition, using the ICD to program the chip in circuit, it seems that I
*>don't always get a good burn. In other words, I can program it once, and
*>something doesn't work quite right, and then I can reburn, and it does work.
*>  Anyone else seeing this as well?

I haven't seen this but with some chip+board+icsp programmer combinations
and chips re-used dozens (?) of times in development cycles I did have to
issue up to four consecutive erase commands (without programming anything)
to restore reliable operation in chips used for development. Especially
windowed parts (where the erase command was 1/2 day spent under 1kW of Hg
vapor lamps - normal erase time is 10 minutes) had this sort of problem
(like 16C711JW ans 12C509JW).

Peter

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