Hi Mr. Eric,

you wrote:

Be careful, There has been cases of homemade programmers seeming to work very well; however it turned out that the flash retention was not what it should be (< 1 year rather than forever)

This is a new information to me, I have few questions about it. Would you be kind enough to elaborate the following:

1) Any programmable device has a specific programming algorithm, and if programmed according to the algorithm, it must retain the program forever.

2) What difference is there between a home made programmer and professional programmer, that in former case data retention time is <1 year and in later case the data retention time is forever.

3) If I believe that you are right in your claim, then it is apparent that programming algorithm specified in the data sheet is wrong, and the correct programming algorithm is only supplied/available to device progranmmer manufacturers like BP, Hi-Lo system, ADVIN etc.


Regards,

IA