The Atmel 89C51 Microcontroller or commonly known as AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory (PEROM). The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 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 AT89C51 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

Features of Atmel AT89C51 Microcontroller:

• Operating Voltage: 4.5V to 5V.
• Compatible with MCS-51™ Products.
• 4K Bytes of In-System Reprogrammable Flash Memory.
• Endurance: 1,000 Write/Erase Cycles
• Fully Static Operation : 0 Hz to 24 MHz
• Three-level Program Memory Lock.
• 128 x 8-bit Internal RAM.
• 32 Programmable I/O Lines.
• Two 16-bit Timer/Counters.
• Six Interrupt Sources.
• Programmable Serial Channel.
• Low-power Idle and Power-down Modes.

Applications of Atmel AT89C51 Microcontroller:

• Multiple DIY projects.
• Projects requiring more than logical control for devices.
• Microcontroller applications for multiple device interface/Control.
• Replacement for Arduino module.
• Needs a USB AVR programmer.

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