Question

The number of cycles required to execute the given instruction is:
MOV DPTR,#data16
1. 3
2. 2
3. 4
4. 1

Answer 1

Correct Answer - Option 2 : 2

MOV DPTR,#data16-

Function: Load data pointer with a 16 bit constant. 

Description: 

The Data Pointer is loaded 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 low-order byte. No flags are affected. This is the only instruction that moves 16-bits of data at once.

Example: 

The instruction, MOV DPTR, 1234H will load the value 1234H into the Data Pointer. DPH will hold 12H and DPL will hold 34H.

Byte: 3

Number of cycles required for execution: 2