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The number of bytes stored on the stack during one operation of PUSH or POP is

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in Microprocessor by (39.4k points)
The number of bytes stored on the stack during one operation of PUSH or POP is

(a) 1

(b) 2

(c) 3

(d) 4

This question was addressed to me during an online exam.

My question is based upon Interrupt and Stack of 8051 topic in division Microcontroller 8051 of Microprocessor

1 Answer

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by (49.2k points)
Correct option is (a) 1

Best explanation: As 8051 stack operations are 8-bit wide i.e. in an operation using PUSH or POP instruction, one byte of data is stored on a stack or retrieved from the stack. For implementing 16-bit operations, two 8-bit operations are cascaded.

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