At89s51 Cmos 8 Bit Microcontroller

Description:

The AT89S51 is a low-power, high-performance CMOS 8-bit microcontroller with 4K
bytes of In-System Programmable Flash 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.
lass="yoast-text-mark" />>By combining a versatile 8-bit CPU with In-System Programmable Flash on
a monolithic chip, the Atmel AT89S51 is a powerful microcontroller which provides a
highly-flexible and cost-effective solution to many embedded control applications.
>

Features:

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>• Compatible with MCS®-51 Products
• 4K Bytes of In-System Programmable (ISP) Flash Memory
– Endurance: 10,000 Write/Erase Cycles
• 4.0V to 5.5V Operating Range
• Fully Static Operation: 0 Hz to 33 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

Specifications (AT89S51 Microcontroller)

• Architecture: 8-bit CMOS microcontroller

• Instruction Set: Compatible with MCS-51 family

• Program Memory: 4 KB In-System Programmable Flash

• RAM: 128 bytes internal RAM

• EEPROM: Not available (use external memory if needed)

• Operating Voltage: 4V – 5.5V

• Clock Speed: Up to 24 MHz

• I/O Pins: 32 programmable I/O lines

• Timers/Counters: Two 16-bit timers/counters

• Serial Communication: Full-duplex UART

• Interrupts: Six interrupt sources with two priority levels

• Power Features: Low-power idle and power-down modes

• Package Options: 40-pin DIP, PLCC, or QFP