what are the difference between AT89C51 and AT89C52?
what are the difference between AT89S51, and AT89S52
As we're waking up old threads, note that the "8052.com" domain name had been sold off - it is no longer a microcontroller forum!
The old 8052.com forum is now at http://www.8052mcu.com/
See http://www.8052mcu.com/forum/read/190875 for details.