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[WORD]
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- Update:
- 2012-11-26
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Description: 1, 8279 provided by the keyboard test bench circuits, digital display circuit, the design of an electronic clock, electronic clock with a small keyboard to control the start and stop and the preset initial value.
Clock display format is as follows:
XX. XX. XX, respectively, from left to right too, minutes, seconds.
Requires the following functions:
(1), C keys clear display 00.00.00
(2), G key start, electronic clock time
(3), D keys: Stop, stop the timing clock
(4), P key: Set the initial value from left to right followed by input preset hours, minutes and seconds value, and should have the ability to determine the input error, if the input is wrong,
Shows: E-----------
At this point hit a key which indicates that either:
00.00.00
Hit P key to re-enter the preset value.
(5), E key: program exit, back under control.
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