Cmos Single-chip 8-bit Microcontroller - Nxp Semiconductors

The P83C654 Single-Chip 8-Bit Microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 Microcontroller family. The 83C654 has the same instruction set as the 80C51. Two versions of the derivative exist: 83C654 16k bytes mask programmable ROM 87C654 EPROM version (described in a separate data sheet) This device provides architectural enhancements that make it applicable in a variety of applications for general control systems. The 83C654 contains a non-volatile 16k 8 read-only program memory, a volatile 256 8 read/write data memory, four 8-bit I/O ports, two 16-bit Timer event Counters (identical to the Timers of the 80C51), a multi-source, two-priority-level, nested interrupt structure, an I 2C Interface UART and on-chip Oscillator and Timing circuits. For systems that require extra capability, the 8XC654 CAN be expanded using standard TTL compatible Memories and Logic By NXP Semiconductors