INTRODUCTION TO MICROPEOCESSOR
MICROCOMPUTER SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is a command that selects automatic EOI with rotating priority.
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Rotate-on-Automatic
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Rotate-on-Nonspecific
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Rotate-on-Specific
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Set Priority
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Explanation:
Detailed explanation-1: -8259 requires two types of control words: ICW→ Used to set up proper conditions and specify RST vector address. OCW→ Used to perform functions such as masking interrupts, setting up status read operations etc.
Detailed explanation-2: -This completes the 3-byte CALL instruction released by the 8259A. In the AEOI (automatic end of interrupt) mode, the ISR bit is reset at the end of the third INTA pulse. Otherwise, the ISR bit remains set until an appropriate EOI (end of interrupt) command is issued at the end of the interrupt sequence.
There is 1 question to complete.