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When 8051 Microcontroller is powered up, the stack pointer contains the value

When 8051 Microcontroller is powered up, the stack pointer contains the value Correct Answer 07H

  • 8051 has internal RAM (128 Bytes) and ROM (4K Bytes)
  • The stack is a section of RAM used by the CPU to store information temporarily.
  • The registers used to access the stack is called the Stack Pointer (SP) register. 
  • The Stack pointer in 8051 is only 8 bit wide and can take values of 00 to FFH.
  • When the 8051 is powered up, the SP register contains value 07H.
  • This means that RAM location 08H is the first location used for the stack by the 8051.

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