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History of Microcontroller

The first single chip microprocessor was the 4 bit Intel 4004 released in 1971, with other more capable processors available over the next several years. These, however all required external chips to implement a working system, raising total system cost, and making it impossible to economically computerize appliances.

The first computer system on a chip optimized for control applications - micro controller was the Intel 8048 released in 1976, with both RAM and ROM on the same chip. This chip would find its way into over one billion PC keyboards, and other numerous applications.

Most microcontrollers at this time had two variants. One had an erasable EEPROM program memory, which was significantly more expensive than the PROM variant which was only programmable once.

The Evolution of Microcontrollers has undergone a significant change since early 1970s. The Development table of microcontrollers is given as follows:

History of Microcontroller






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