Product Overview

Low-power, high-performance CMOS 8bit microcontroller uses high-density non-volatile memory technology and is compatible with the industry-standard 80C51 instruction set and pin-out. The on-chip flash allows the program memory to be reprogrammed in-system or by a conventional non-volatile memory programmer. By combining a versatile 8bit CPU with In-System Programmable flash on a monolithic chip, the Atmel AT89S51 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications.

Compatible with MCS®-51 products
4Kbytes of In-System Programmable (ISP) flash memory
Endurance: 10,000 write/erase cycles
Three-level program memory lock, six interrupt sources
128 x 8bit Internal RAM, 32 programmable I/O lines and two 16bit timer/counters
Full duplex UART serial channel, low-power idle and power-down modes
Interrupt recovery from power-down mode
Watchdog timer, dual data pointer and power-off flag
Fast programming time
Flexible ISP programming (byte and page mode)