July 2008
Intermediate to advanced
544 pages
16h 52m
English
Content preview from Computers as Components, 2nd Edition
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198 CHAPTER 4 Bus-Based Computer Systems
Alarm off: turns off buzzer, takes clock out of alarm-on state,
turns off alarm ready light.
Performance Displays hours and minutes but not seconds. Should be
accurate within the accuracy of a typical microprocessor
clock signal. (Excessive accuracy may unreasonably drive
up the cost of generating an accurate clock.)
Manufacturing
cost
Consumer product range. Cost will be dominated by the
microprocessor system, not the buttons or display.
Power Powered by AC through a standard power supply.
Physical size and
weight
Small enough to fit on a nightstand with expected weight
for an alarm clock.
4.8.2 Specification
The basic ...