describe fetch-decode-execute cycle for LDR instruction

The LDR instruction in a computer's architecture is used to load data from memory into a register. The fetch-decode-execute cycle is a three-step process that is used to execute instructions in a computer system.

1. Fetch: The first step is the fetch stage, where the instruction is fetched from memory into the instruction register (IR). In the case of an LDR instruction, the instruction will be loaded from memory into the IR.

2. Decode: In the decode stage, the instruction is decoded to determine the type of operation that needs to be performed. In the case of an LDR instruction, the processor will decode the instruction and determine that it is a load operation.

3. Execute: In the execute stage, the operation specified by the instruction is performed. In the case of an LDR instruction, the processor will execute the instruction and load the specified data from memory into the specified register.

Overall, the fetch-decode-execute cycle for an LDR instruction involves fetching the instruction from memory, decoding it to determine that it is a load operation, and then executing the instruction to load the specified data from memory into the specified register.