Hi,everyone. Now I want to migrate T89C51RD2 to AT89C51ED2. When I download the same and simple codes to them, and the general 8051-keil's compiler enviroment is included. (and get verified value rightly,so maybe the code has been downloaded to them correctly.) When I put them to my hardware board, the T89C51RD2 can run correctly in it,but AT89C51ED2 can not. Do you know the likely reason? Give me some advice,thanks.