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 program indicating the connection of the slave to the master.
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OCW2
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OCW3
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ICW2
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ICW3
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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: -Here S8259 is the slave8259. Here M 8259 is the Master 8259 and 8085 is the microprocessor used. The interrupts are IR4 and INTR and so on.
Detailed explanation-3: -8259 has four initialization command words namely ICW1, ICW2, ICW3, and ICW4 and three operation command words namely as OCW1, OCW2, and OCW3. The processor reads the status of 8259 by reading at the two ports termed as low port and the high port. Moreover, there are several status words to be read further.
There is 1 question to complete.