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Module 2: The 8051 Architecture

20252m

Which company developed the 8051 microcontroller?

(i) Intel
(ii) AMD
(iii) IBM
(iv) Motorola

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Answer: (i) Intel

Explanation: The 8051 microcontroller family was developed by Intel in 1980 (MCS-51). Intel's original 8051 had 4K ROM, 128 bytes RAM, 32 I/O lines, two 16-bit timers, and serial port. Later variants by Atmel, Philips/NXP, etc., are second-sourced. AMD, IBM, Motorola did not develop 8051.

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