A microprocessor scans the status of an output I/O device every 20 ms. This is accom- plished by means of a timer alerting the processor every 20 ms. The interface of the device includes two ports: one for status and one for data output. How long does it take to scan and service the device given a clocking rate of 8 MHz? Assume for sim- plicity that all pertinent instruction cycles take 12 clock cycles.

A microprocessor scans the status of an output I/O device every 20 ms. This is accom- plished by means of a timer alerting the processor every 20 ms. The interface of the device includes two ports: one for status and one for data output. How long does it take to scan and service the device given a clocking rate of 8 MHz? Assume for sim- plicity that all pertinent instruction cycles take 12 clock cycles.

Name: A microprocessor scans the status of an output I/O device every 20 ms
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Description: A microprocessor scans the status of an output I/O device every 20 ms. This is accom-plished by means of a timer alerting the processor every 20 ms. The interface of thedevice includes two ports: one for status and one for data output. How long does

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...

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