an 8 bit processor
89s51 and 89s52 both are same version of 8051 microcontroller
The difference between performance of 89c51 and 89s51 is that the 89c51 has a standard 51 core. The 89c51 program cannot be directly ported to 51 compared to the 89s51.
s for static
c in 89c51 stands for cmos.. s in 89s51 stands for system programming system programming is way of burning your program into microcontroller chip... just like we write a program in c language and then burn it into microcontroller.this in system programming is another way of burning your program into microcontroller....
Difference Between the 89C51 Micro-controllers and 89S51Following are the main differences between 89S51/S52 and 89C51/C52In 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 . Where ISP stands for In System Programming89s51 has more new feature than 89c51 such as Watchdog Timers 51 is more cheaper than c 51 . if you want to use the application for longtime better use c 51 .
The 3-level program memory lock in the 89S51 microcontroller refers to a security feature that protects the program memory from unauthorized access or modification. The three levels include: Level 1, which allows read access but prevents programming; Level 2, which restricts both read and program access; and Level 3, which locks the device, making it impossible to read or write to the program memory. This feature is particularly useful for safeguarding proprietary code and intellectual property in embedded applications.