Data Transfer Instructions Of 8051 - Ppt
In the 8051 architecture, data transfer involves moving a byte of data from a source address to a destination address. The source remains unchanged, while the destination is updated with the new value. These operations can involve: Internal RAM and Special Function Registers (SFRs). External Data Memory (XRAM). Program Memory (ROM/Flash). 2.1 Internal Data Transfer ( MOV )
Swaps the full byte between Accumulator and a register. Data Transfer Instructions Of 8051 Ppt
To read look-up tables or constants stored in the program memory (ROM), the MOVC (Move Code) instruction is used. MOVC A, @A+DPTR or MOVC A, @A+PC In the 8051 architecture, data transfer involves moving
Since the 8051 has a limited internal RAM (128/256 bytes), it often interfaces with up to 64KB of external RAM. The MOVX instruction is specifically designed for this purpose and always involves the Accumulator ( A ). MOVX A, @DPTR or MOVX @DPTR, A External Data Memory (XRAM)
Useful for segment decoding (e.g., driving a 7-segment display). 2.4 Stack Operations ( PUSH and POP )
These instructions swap the contents of the source and destination rather than just copying.
This paper provides a technical overview of the for the Intel 8051 microcontroller, focusing on how data is moved between registers, internal RAM, external memory, and the accumulator. Abstract