In revision "S" or earlier AT89S8252 and AT89LS8252, inadvertent writes to EEPROM or FLASH memory can occur. The solution is to use revision "T" or later. Is anybody knowing, how to recognize AT's revision?
I have asked local ATMEL's office (the first time about a 2 months), but they haven't answered me yet.

I have been using:
AT89S8252
24PI
0029

I have asked local distributors, too. They also don't know, how to recognize the revision of micro. It is very urgent, help me please.