89c51 and 89s51 | Microcontroller › 8051 › 89S51 and 89C51 similarity or difference › 89c51 and 89s51 June 26, 2013 at 8:05 am #10036 ddrkParticipant 89c51 and 89s51 difference…… In S series the main difference is that you can program the “S” verison through ISP (in application) or using very simple programmers, while the “C” version still needs “full” parallel programmer . (ISP stands for In System Programming)
