Texas Instruments MSP430x1xx User Manual
Page 392
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Instruction Set Overview
B-42
* NOP
No operation
Syntax
NOP
Operation
None
Emulation
MOV
#0,#0
Description
No operation is performed. The instruction may be used for the elimination of
instructions during the software check or for defined waiting times.
Status Bits
Status bits are not affected.
The NOP instruction is mainly used for two purposes:
-
To hold one, two or three memory words
-
To adjust software timing
Note:
Emulating No-Operation Instruction
Other instructions can emulate no-operation instruction using different
numbers of cycles and code words.
Examples:
MOV
0(R4),0(R4)
; 6 cycles, 3 words
MOV
@R4,0(R4)
; 5 cycles, 2 words
BIC
#0,EDE(R4)
; 4 cycles, 2 words
JMP
$+2
; 2 cycles, 1 word
BIC
#0,R5
; 1 cycle, 1 word
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