6F3B0250
Basic Hardware and Function
227
7. Instructions
FUN 141
DI
Disable interrupt
Expression
Input
-
[ DI ]
-
Output
Function
When the input is ON, this instruction disables the execution of user designated interrupt operation,
i.e. timer interrupt program and I/O interrupt programs.
Execution condition
Input
Operation
Output
OFF
No execution
OFF
ON
Execution
ON
Operand
No operand is required.
Example
In the above example, the interrupt is disabled when R000 is ON, and it is enabled when R000 is
OFF.
Note
·
Refer to the EI instruction (FUN 140).
·
If an interrupt factor is occurred during the interrupt disabled state, the interrupt is kept waiting and
it will be executed just after the EI instruction is executed.
·
The DI instruction can be used only in the main program.
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