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Chapter4 Example - Bus-Based Computer Systems Example alarm...

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Bus-Based Computer Systems Example: alarm clock © 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed.
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Alarm clock interface © 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. Alarm on Alarm off Alarm ready set time set alarm hour minute light button PM buzzer
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Operations © 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed. Set time: hold set time, depress hour, minute. Set alarm time: hold set alarm, depress hour, minute. Turn alarm on/off: depress alarm on/off.
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Alarm clock requirements name alarm clock purpose 24-hour digital clock with one alarm inputs set time, set alarm, hour, minute, alarm on/off outputs four-digit display, PM indicator, alarm ready, buzzer functions keep time, set time, set alarm, turn alarm on/off, activate buzzer by alarm performance hours and digits, no seconds; not high precision manufacturing cost consumer product power AC physical size/weight fits on stand © 2008 Wayne Wolf Overheads for Computers as Components 2 nd ed.
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