1 Question : (TCO 1) In a typical keypad switch, bouncing occurs for how long?
 Student Answer: [removed]5 to 20 ns [removed]5 to 20 μs [removed]5 to 20 ms [removed]5 to 20 s

 Question 2. Question : (TCO 1) The following data will display the letter ‘A’ on the LCD. [removed]data = 0x41, CSB = 0, E = ↓, RS = 1, R/W~ = 0

[removed]data = 0x61, CSB = 0, E = ↓, RS = 1, R/W~ =

 Question 2. Question : (TCO 1) The following data will display the letter ‘A’ on the LCD.

0

[removed]data = 0x41, CSB = 0, E = ↓, RS = 0, R/W~ = 0

[removed]data = 0x61, CSB = 0, E = ↑, RS = 1, R/W~ = 0

 Question 3. Question : (TCO 1) For the LCD, describe the function accomplished with the RS control signal. Also, indicate whether this signal is an LCD input or LCD output.

 Question 4. Question : (TCO 1) Describe how the 74C922 IC operates and its interface between the keypad and the microcontroller.

 Question 5. Question : (TCO 1) In the LCD initialization sequence, which command configures the LCD to a 4-bit data transfer instead of an 8-bit data transfer? Also, identify the point in the initialization sequence that this occurs.

• Posted: 5 years ago
Week 1 - Quiz

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