AT89C51 or AT89S52 | Microcontroller › 8051 › AT89C51 or AT89S52 This topic has 1 reply, 2 voices, and was last updated 10 years ago by Harwinder Singh. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts March 5, 2013 at 6:50 am #2159 AkramParticipant can we use AT89S2 inplace of AT89C51 i have 89S2 but the project i am making is done with 9C51 so is it possible if YES then what changes we need to make in the ciruit or program 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. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In