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AT89C55 detail datasheet Microcontroller (8051 family, upto 33 MHz 20KB ROM, 256B RAM, 32 input-output pins)
This file contains datasheet of AT89C55 microcntroller. This microcontroller is manufactured by Atmel (Now Microchip). This has 256 Bytes of RAM memory while AT89C51 has 127 Bytes RAM memory and upto 33 Mhz speed.
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 manufactured 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 monolithicchip, the Atmel AT89C55 is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications.