Devry University - ECET 340: Quiz 1. Questions and Answers.

Devry University - ECET 340: Quiz 1. Questions and Answers. Question 1 5 / 5 pts (TCO 1) A 4 x 5 keypad consists of four columns and five rows. 9 SPST switches. 20 SPST Normally Closed switches. Correct! four rows and five columns. ECET340 Week 1 lecture on keypad Question 2 0 / 5 pts (TCO 1) Which of the following is not an advantage of an LCD compared to an LED display? Ease of programming Correct Answer Limited to display numbers and a few characters You Answered Ability to display numbers, characters, and graphics Declining prices Chapter 12, page 408 Question 3 0 / 5 pts (TCO 1) For the LCD, describe the function accomplished with the data bus (D0 thru D7) signals. Also, indicate whether these signals are an LCD input or LCD output. Your Answer: E is for latching information into the LCD. E = Enable = Input The data bus signals (D0 thru D7) are a bidirectional data bus between the microcontroller and the LCD module. For the 8-bit mode configuration, all eight data bits are used to write data to the LCD module and read data from the LCD module. For the 4-bit mode configuration, only the upper four data bits are used to write the 8-bit data to the LCD module and read 8-bit data from the LCD module one nibble at a time (most significant nibble first followed by least significant nibble). Chapter 12, pages 408–409 Question 4 5 / 5 pts (TCO 1) The keypad flow chart showed three loops. The software code implemented these loops