FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E - Manual (Page 195)

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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.75 ST (Store Word Data in Program Status Register to Memory)
Subtracts 4 from the value of "R15", stores the word data in the program status (PS) to
the memory address indicated by the new value of "R15".
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ST (Store Word Data in Program Status Register to Memory)
Assembler format: ST PS, @ – R15
Operation: R15 – 4
→
R15
PS
→
(R15)
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: a cycle(s)
Instruction format:
Example: ST PS, @ – R15
N Z V C
– – – –
MSB LSB
0 0 0 1 0 1 1 1 1 0 0 1 0 0 0 0
12 3 45670
R15 R15
F F F 8 F 8 C 0
F F F 8 F 8 C 0
12 3 45670
12 3 45674 12 3 45674
1 2 3 4 5 6 7 8
F F F 8 F 8 C 0 P S
1 2 3 4 5 6 7 4
P S
x x x x x x x x
Memory Memory
Before exec u tion After exec u tion
In s tr u ction b it p a ttern : 0001 0111 1001 0000