The EA (External Access) pin in 8051 is used to: a) Select internal or external program memory b) Enable external data memory c) Control ALE Which register is loaded with 0000H when the 8051 is reset?, a) Stack Pointer, Data Pointer, Program Status Word, Program Counter, What does PSW stand for?, Processor Status Word, Program Status Word, Peripheral Status Word, Power Save Word, What is the role of the DPTR register?, Holds 16-bit address for external memory access, Manages stack, Stores accumulator value, Controls timers, What is the maximum external program memory size supported by the 8051?, 32 KB, 4 KB, 2 KB, 64 KB, What is the size of the ALU in 8051?, 32-bit, 4-bit, 8-bit, 16-bit, Calculate total memory space that can be addressed by 8051 microcontroller using 16-bit address bus., 64 KB, 128 KB, 32 KB, 16 KB, Which pins are used for serial communication in 8051?, P1.0 and P1.1, P0.0 and P0.1, P3.0 and P3.1, P2.0 and P2.1, What is the function of the EA pin in 8051?, Reset Signal, Clock Input, Serial Output, External Access Enable, What is the size of internal data memory (RAM) in standard 8051 Microcontroller?, 128 bytes, 64 bytes, 256 bytes, 512 bytes, The 16-bit register used for external memory addressing in 8051 is, PSW, Data Pointer (DPTR), Stack Pointer, Accumulator
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