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Description

The AT89C55WD is a low-power, high-performance CMOS 8-bit microcontroller with 20K bytes of Flash programmable read only memory and 256 bytes of RAM. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry standard 80C51 and 80C52 instruction set and pinout. The on-chip Flash allows the program memory to be user programmed by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C55WD is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications.

Features

? Compatible with MCS?-51 Products

? 20K Bytes of Reprogrammable Flash Memory

? Endurance: 1000 Write/Erase Cycles

? 4V to 5.5V Operating Range

? FullyStaticOperation:0Hzto33MHz

? Three-level Program Memory Lock

? 256 x 8-bit Internal RAM

? 32 Programmable I/O Lines

? Three 16-bit Timer/Counters

? Eight Interrupt Sources

? Programmable Serial Channel

? Low-power Idle and Power-down Modes

? Interrupt Recovery from Power-down Mode

? Hardware Watchdog Timer

? Dual Data Pointer

? Power-off Flag