Nxp 8 bit cmos microcontrollers nxp p80c552eba08 512 the 80c552 single chip 8 bit microcontroller is manufactured in an advanced cmos process and is a derivative of the 80c51 microcontroller family the 80c552 has the same instruction set as the 80c51the 80c552 contains a volatile 256 x 8 readwrite data memory five 8 bit io ports one 8 bit input port two 16 bit timerevent counters identical to the timers of the 80c51 an additional 16 bit timer coupled to capture and compare latches