Using bin2hex converter for bin file I obtained precise (as keil explained) Intel Hex format file which is: :20000000.32characters(replica bincode.)xx(checksum) exactly Intel format for 32 characters. The question is why 20 (32 characters) . How to change to 16 data lenght as :10000000nnnnnnnnnnnnnnnnxx , because 32 data format was rejected by processor i am using (vr1000 eqivalent to Intel8052). No options in bin2hex converter for that or i did not understand Keil instruction well. thank you in advance ! radmilo