Question

Explain Stack pointer (SP).

Explain the following register of 8085 Microprocessor:

Stack Pointer

Answer 1

1. Stack pointer is a 16-bit register, which contains the address of stack top. i.e., the memory address of last byte entered in stack.
2. With the help of incrementer/decrementer, the stack pointer is decremented each time data is pushed onto stack and incremented each time data is popped off the stack