I have passed the test question 3 to realize the keyboard and LED display with specific functions. 1. Understand the design of keyboard and LED display interface and draw the schematic diagram. 2. Complete the following according to the hardware resources provided on the experimental box: a. Press key 1 to display the year b. Press key 2 to display the month and day c. Press key 3 to display GOOD d. Press key 4 to display the 8-character digital tube from left to right in a cycle. 3. Design the circuit and connect the circuit on the experimental table.
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