1. Identify the row and column pressed including the pressed key for the followi
ID: 2990825 • Letter: 1
Question
1. Identify the row and column pressed including the pressed key for the following: RB3-RB0 = 1110 for the row, RB7-RB4 = 1011 for the Column. 2. If RB7-RB4 = 0111 is the data read from the columns, which column does the pressed key belong to? 3. In the keyboard interface in problem 1, to identify the key pressed, which of the following is grounded? (a) All rows (b) one row at time (c) both (a) and (b) 4. If a motor takes 90 steps to make one complete revolution, what is the step angle for this motor?Explanation / Answer
Answer 1:
The row belongs to RB0 and The column belongs to RB6, therefore key no. 2 was pressed.
Answer 2:
The pressed key belongs to column RB7.
Answer 3:
All rows are grounded.
Answer 4:
The step angle for this motor if a motor takes 90 steps to make a complete revolution, is 4.
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