FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E - Manual (Page 186)

162
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.66 LDUB (Load Byte Data in Memory to Register)
Extends with zeros the byte data at memory address "Rj", loads to "Ri".
■
LDUB (Load Byte Data in Memory to Register)
Assembler format: LDUB @Rj, Ri
Operation: extu ((Rj))
→
Ri
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: b cycle(s)
Instruction format:
Example: LDUB @R2, R3
N Z V C
– – – –
MSB LSB
0 0 0 0 0 1 1 0 Rj Ri
R2
12345678
1 2 3 4 5 6 7 8
x x x x x x x x
R2
R3 R3
2 1
0 0 0 0 0 0 2 1
1 2 3 4 5 6 7 8
12345678 2 1
Memory Memory
Before execution After execution
Instruction bit pattern : 0000 0110 0010 0011