A panel has a 3x4 matrix keypad and four pushbuttons. What is the minimum number of GPIOs required to scan the keypad and all the pushbuttons if they are all connected together to allow a single scan?- ○ 16- ○ 8- ○ 7- ○ 12This question requires understanding how to interface a matrix keypad and additional pushbuttons with GPIO (General Purpose Input/Output) pins. The options suggest different quantities of GPIOs, with an emphasis on determining the most efficient configuration.

As you know matrix is 3*4 but there are 4 push buttons that make the matrix 4*4 so to read all the…

Answered: A panel has a 3x4 matrix keypad and…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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A panel has a 3x4 matrix keypad and four pushbuttons. What is the minimum number of GPIOS required to scan the keypad and all the pushbuttons if they are all connecte together to allow a single scan? 16 8 7 12