![]() The registers and memory organisation is same as that of the MCS 51.The pin functions of Atmel 89C51 are same as that of MCS-51. Typically 1000 write/erase cycles are possible which is more than sufficient for any embedded application. The mechanism foe erasing the memory is easier than that for EEPROM. ![]() The flash memory on the chip is a non-volatile memory, which can be electrically erased for lines and blocks. 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. The on-chip flash allows the program memory to be reprogrammed in-system. ![]() The device is manufactured using Atmel’s high-density nonvolatile memory technology INTRODUCTION Atmel introduced its first 8-bit Flash microcontroller AT89C51 in 1993, based on the 8051 core The AT89C51 is a low-power high performance CMOS 8-bit Microcontroller with 4 k.bytes of flash programmable and erasable read only memory(PEROM).It is compatible with the INTEL’S industry standard MCS51 instruction set and pin-out. ATMEL MICROCONTROLLERS (89C51 & 89C2051) Dr.Y.NARASIMHA MURTHY Ph.D Sri Sai Babba National college(Autonomous) ANANTAPUR-515001-A.P-INDIA ![]()
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