The number of pins in 8051 microcontroller is? (i) 64 (ii) 44 (iii) 40

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Module 2: The 8051 Architecture

20232m

The number of pins in 8051 microcontroller is?
(i) 64
(ii) 44
(iii) 40
(iv) 100

Worked SolutionAI Assisted

Answer: (iii) 40

Explanation: Standard 8051 (DIP-40) has 40 pins: 32 I/O (P0-P3), 2 crystal (XTAL1/2), RST, EA/VPP, ALE/PROG, PSEN, VCC, VSS. Other packages (PLCC-44, TQFP-44 with 44 pins) exist, but classic 8051 is 40-pin DIP.

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