S83C552 - Single-chip 8-bit microcontroller
The 80C552/83C552 (hereafter generically referred to as 8XC552) Single-Chip 8-Bit Microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family.
The 8XC552 has the same instruction set as the 80C51.
Three versions of the derivative exist: