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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.71 ST (Store Word Data in Register to Memory)
Loads the word data in "Ri" to memory address "(R14 + o8 × 4)".
The value "o8" is a signed calculation.
■ ST (Store Word Data in Register to Memory)
Assembler format: ST Ri,@ (R14, disp10)
Operation: Ri → (R14 + o8 × 4)
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: a cycle(s)
Instruction format:
Example: ST R3, @ (R14, 4)
NZVC
––––
MSB LSB
0011 Rio8
12345678
R3R3
8765 4321
8765 4321
12345678
1234567C 1234567C
1234 5678
8765 4321
R14
1234 5678
R14
Instruction bit pattern : 0011 0000 0001 0011
xxxx xxxx
Memory Memory
Before execution After execution