hello akramyou need to change | Microcontroller › 8051 › AT89C51 or AT89S52 › hello akramyou need to change March 5, 2013 at 9:15 am #9244 Harwinder SinghParticipant hello akram you need to change nothing in code or circuit diagram you can use 89s52 in place of 89c51. one change tht required you have to change your devie in keil from 89c51 to 89s52.
