Increments the Stack Pointer (SP) and then copies data to the stack. POP: Copies data from the stack and then decrements the SP. 2.5 Data Exchange ( XCH and XCHD )
Understanding data transfer instructions is fundamental to 8051 programming. While they do not affect the flags in the Program Status Word (PSW)—except for some operations involving the Accumulator—they form the backbone of any system's data flow, ensuring that information is correctly positioned for logical and arithmetic processing. Data Transfer Instructions Of 8051 Ppt
The stack is a section of internal RAM used for temporary storage during subroutines or interrupts. Increments the Stack Pointer (SP) and then copies