Product Summary

The AT89C55WD-24PI 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 AT89C55WD-24PI is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry standard 80C51 and 80C52 instruction set and pinout. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C55WD-24PI is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications.

Parametrics

AT89C55WD-24PI absolute maximum ratings:(1)operating temperature:-55 to 125℃;(2)storage temperature:-65 to 150℃;(3) Voltage on any pin with respect to ground:-1.0 to 7.0V; (4) Maximum operating voltage: 6.6V; (5) DC output current: 15.0mA.

Features

AT89C55WD-24PI features:(1)20K bytes of reprogrammable flash memory; (2)endurance: 1000 write/erase cycles; (3)4V to 5.5V operating range; (4)fully static operation: 0 Hz to 33 MHz; (5)three-level program memory lock; (6)256 x 8-bit internal RAM; (7)32 programmable I/O lines; (8)three 16-bit timer/counters; (9)eight interrupt sources; (10)programmable serial channel; (11)low-power idle and power-down modes; (12)interrupt recovery from power-down mode; (13)hardware watchdog timer; (14)dual data pointer; (15)power-off flag; (16)green (Pb/Halide-free) packaging option.

Diagrams

AT89C55WD-24PI block diagram

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