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FR81 Family
312 FUJITSU MICROELECTRONICS LIMITED CM71-00105-1E
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.114
7.114 LDUB (Load Byte Data in Memory to Register)
Loads the byte data at memory address BP+u16 to Ri. Unsigned u16 value is calculated.
The value in u16 is specified as udisp16.
● Assembler Format
LDUB @(BP, udisp16), Ri
● Operation
(BP+u16) → Ri
● Flag Change
N, Z, V, C: Unchanged.
● Classification
Memory Load instruction, FR81 family
● Execution Cycles
a cycle
● Instruction Format
● EIT Occurrence and Detection
A data access protection violation exception, an invalid instruction exception (data access error), or an
interrupt is detected.
NZVC
----
MSB LSB
(n+0)000001110110 Ri
(n+2) u16