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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.55 LDI:8 (Load Immediate 8-bit Data to Destination Register)
Extends the 8-bit immediate data with 24 zeros in the higher bits, loads to "Ri".
■ LDI:8 (Load Immediate 8-bit Data to Destination Register)
Assembler format: LDI:8 #i8, Ri
Operation: extu (i8) → Ri
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: 1 cycle
Instruction format:
Example: LDI:8 #21H, R3
NZVC
––––
MSB LSB
1100 Rii8
R3 R3
0000 00210000 0000
Before execution After execution
Instruction bit pattern : 1100 0010 0001 0011