Question
Download Solution PDFWhich one is true for LHLD instruction ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
LHLD Instruction in Microprocessors
Definition: The LHLD (Load HL Pair Direct) instruction is used in microprocessor programming to load the contents of a specified memory location into the HL register pair. This instruction is part of the instruction set of the 8085 microprocessor, which is an 8-bit microprocessor.
Working Principle: When the LHLD instruction is executed, the microprocessor fetches the specified 16-bit address from the instruction and then loads the contents of the memory location at that address into the L register. Simultaneously, it loads the contents of the next consecutive memory location (address + 1) into the H register. This effectively loads the HL register pair with a 16-bit value from two consecutive memory locations.
Instruction Format: The LHLD instruction is a 3-byte instruction, where the first byte is the opcode for LHLD, and the next two bytes represent the 16-bit address from which the data is to be loaded. The instruction format can be illustrated as follows:
Opcode | Address Low | Address High
-------------------------------------
LHLD | 8-bit | 8-bit
Correct Option Analysis:
The correct option is:
Option 2: Three Byte Instruction
This option correctly describes the LHLD instruction as a three-byte instruction. The first byte is the opcode, and the next two bytes represent the 16-bit address from which the data is to be loaded into the HL register pair.
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