(a) For Figure 9-44, describe the conditions necessary to transmit data from device 3 to the microprocessor....

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(a) For Figure 9-44, describe the conditions necessary to transmit data from device 3 to the microprocessor.

(b) What will the status of the data bus be when none of the devices is enabled?


Figure 9-44

CLOCK ENABLE 1 Keyboard ENABLE 2> Device-1 eight-bit counter Device-2 keyboard. encoder aggagag OE OE Data

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Digital Systems Principles And Application

ISBN: 9780134220130

12th Edition

Authors: Ronald Tocci, Neal Widmer, Gregory Moss

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