An I/O port is a section of the MCU that includes _____
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A. a group of pins that can be input and/or output
B. a register that holds the data associated with the group of pins
C. a software module that communicates with the group of pins
D. a and b
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I/O direction is _____
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A. relative to the MCU
B. relative to the peripheral
C. relative to either depending on the specific interfacing standard
D. based on standard coordinates
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For polled I/O, the MCU _____
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A. checks periodically whether a peripheral requests an I/O operation
B. reads a flag bit in a status register
C. uses a polling loop
D. all of the above
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For the parallel I/O subsystem _____
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A. use special instructions for reading and writing
B. each line carries a bit of the data word
C. each line carries parallel information
D. none of the above
Answers
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Posted 06 May 2017 03:05 AM
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