8051 Move Word

Move Word – MOV DPTR,#data16

MOV DPTR,#data16 loads the Data Pointer with the 16-bit constant indicated. The 16-bit constant is loaded into the second and third bytes of the instruction. The second byte (DPH) is the high-order byte, while the third byte (DPL) holds the lower-order byte. No flags are affected. This is the only instruction which moves 16 bits of data at once.

Encoding:10010000 immediate data15-8 immediate data7-0

The instruction,
MOV DPTR, # 1234H
loads the value 1234H into the Data Pointer: DPH holds 12H, and DPL holds 34H.
Example:

	ORG 0H	; start (origin) at location 0
MAIN :
	MOV DPTR, #55AAH	; load AAH in to DPL and 55H in to DPH
	END	; end of asm source file

---

<< Previous :: Up :: Next >>

---

Related topics:
8051 Move Byte   |   8051 Move Bit   |   8051 Move Code Byte   |   8051 Move External   |   8051 MOVX Instruction   |   8051 MOVC Instruction   |   8051 MOV Instruction

---

List of topics: 8051

---