The AT89C51 is a low-power, high-performance CMOS 8-bit microcontroller with 4KB of Flash Programmable and Erasable ROM. Built using Atmel’s high-density nonvolatile memory technology, it is fully compatible with the industry-standard MCS-51™ instruction set and pinout. Its on-chip Flash allows for in-system or standard programmer reprogramming. By integrating a robust 8-bit CPU with Flash memory on a single chip, the AT89C51 delivers a flexible and cost-effective solution for a wide range of embedded control applications.