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CM71-00105-1E FUJITSU MICROELECTRONICS LIMITED 387
FR81 Family
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.153
7.153 ST (Store Word Data in Register to Memory)
Subtracts 4 from the value of R15, stores the word data in Ri to the memory address
indicated by the new value of R15. If R15 is given as the parameter Ri, the data transfer
will use the value of R15 before subtraction.
● Assembler Format
ST Ri,@-R15
● Operation
R15 - 4 → R15
Ri → (R15)
● Flag Change
N, Z, V, C: Unchanged.
● Classification
Memory Store instruction, Instruction with delay slot
● Execution Cycles
a cycle
● Instruction Format
NZVC
----
MSB LSB
000101110000 Ri