Hi Neil

Using ICT 93C66A doesn't work either. No erase, no burn. Data just doesn't want to change. I have no problem burning other chips like the National 93C66, only those Atmel give me trouble.

Atmel's datasheet states the following:
ERASE/WRITE DISABLE (EWDS): To protect against accidental data ...

I have exactly the same problem with an Atmel 93C66A. Does anybody at Dataman care to answer?

Thanks
JL