: 3 Bytes (Byte 1: Opcode, Byte 2: Lower-order address, Byte 3: Higher-order address) Function :
: 5 (Opcode Fetch, Memory Read, Memory Read, Memory Read, Memory Read) T-States : 2. Breakdown of Machine Cycles The timing diagram is divided into five distinct phases: Machine Cycle Description M1 Opcode Fetch 4 T-states Fetches the opcode 2Bh from memory. M2 Memory Read 3 T-states Reads the lower-byte of the 16-bit address ( M3 Memory Read 3 T-states Reads the higher-byte of the 16-bit address ( M4 Memory Read 3 T-states Timing Diagram Of Lhld Instruction In 8085
: The processor reads the two-byte address from the memory locations immediately following the opcode. : 3 Bytes (Byte 1: Opcode, Byte 2:
: The processor increments the address by 1, reads the next byte, and stores it in the H register . : The processor increments the address by 1,
The (Load H and L registers direct) instruction in the 8085 microprocessor is a 3-byte instruction that loads the contents of a specific 16-bit memory address into the H-L register pair . It is one of the most complex instructions in terms of timing, requiring 5 machine cycles and 16 T-states to complete. 1. Instruction Overview Opcode : 2Bh (for LHLD)