AT89C55 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C55

8-Bit Microcontroller with 20K Bytes Flash

Atmel Corporation 

AT89C55

Features

• Compatible with MCS-51™ Products

• 20K Bytes of In-System Reprogrammable Flash Memory

– Endurance: 1,000 Write/Erase Cycles

• Fully Static Operation: 0 Hz to 33 MHz

• Three-Level Program Memory Lock

• 256 x 8-bit Internal RAM

• 32 Programmable I/O Lines

• Three 16-bit Timer/Counters

• Eight Interrupt Sources

• Low Power Idle and Power Down Modes

Description

The AT89C55 is a low-power, high-performance CMOS 8-bit microcomputer with 20K

bytes of Flash programmable and erasable read only memory. The device is manu-

factured using Atmel’s high density nonvolatile memory technology and is compatible

with the industry standard 80C51 instruction set and pinout. The on-chip Flash allows

the program memory to be reprogrammed in-system or by a conventional nonvolatile

memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic

chip, the Atmel AT89C55 is a powerful microcomputer which provides a highly flexible

and cost effective solution to many embedded control applications.

(continued)

Pin Configurations

PDIP

8-Bit

Microcontroller

with 20K Bytes

Flash

AT89C55

PQFP/TQFP

PLCC

0580D-A–12/97

4-169

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