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S3C72G9 Datasheet(PDF) 52 Page - Samsung semiconductor

Part # S3C72G9
Description  SAM47 INSTRUCTION SET
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Manufacturer  SAMSUNG [Samsung semiconductor]
Direct Link  http://www.samsung.com/Products/Semiconductor
Logo SAMSUNG - Samsung semiconductor

S3C72G9 Datasheet(HTML) 52 Page - Samsung semiconductor

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,4)''!!-$,
DI
Operation:
Operand
Operation Summary
Bytes
Cycles
-
Disable all interrupts
2
2
Description:
Bit 3 of the interrupt priority register IPR, IME, is cleared to logic zero, disabling all interrupts.
Interrupts can still set their respective interrupt status latches, but the CPU will not directly service
them.
Operand
Binary Code
Operation Notation
-
1
1
1
1
1
1
1
0
IME
← 0
1
0
1
1
0
0
1
0
Example:
If the IME bit (bit 3 of the IPR) is logic one (e.g., all instructions are enabled), the instruction
DI
sets the IME bit to logic zero, disabling all interrupts.


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