The AT89S52 is a low-power, high performance CMOS 8bit microcontroller with 8k bytes of in-system programmable flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pin out. The Atmel AT89S52 is a powerful microcontroller which provides a highlyflexible and cost-effective solution to many embedded control applications.