FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E - Manual (Page 187)

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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.67 LDUB (Load Byte Data in Memory to Register)
Extends with zeros the byte data at memory address "(R13 + Rj)", loads to "Ri".
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LDUB (Load Byte Data in Memory to Register)
Assembler format: LDUB @ (R13, Rj), Ri
Operation: extu ((R13 + Rj))
→
Ri
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: b cycle(s)
Instruction format:
Example: LDUB @(R13, R2), R3
N Z V C
– – – –
MSB LSB
0 0 0 0 0 0 1 0 Rj Ri
R2
12345678
0 0 0 0 0 0 0 4
x x x x x x x x
R2
R3 R3
2 1
0 0 0 0 0 0 2 1
0 0 0 0 0 0 0 4
12345678
1234567C 1234567C 2 1
1 2 3 4 5 6 7 8 R13 R13 1 2 3 4 5 6 7 8
Memory Memory
Before execution After execution
Instruction bit pattern : 0000 0010 0010 0011