Microcontroller is MSP432E401Y

Microprocessor is Cortex-M4

1. Referring to textbook section 4.2.2, figure 4.12, from a programmer's perspective explain how the two states of the switch (open, closed) work for negative logic, external. You may assume the port pin is fully pre-configured as an input. [5] 2. Review see textbook figure 8.15. This figure illustrates an electrical structure similar to the lab's Grayhill 96BB2-006-R 4x4 keypad. From the figure, determine if the switches are configured as: (a) positive logic, external (b) negative logic, external [5] 3. Create a flowchart for a program that scans the 4x4 keypad using 4-output and 4-input GPIO pins and identifies which single button has been pressed (assume only one can be pressed at a time). [15] 1. Referring to textbook section 4.2.2, figure 4.12, from a programmer's perspective explain how the two states of the switch (open, closed) work for negative logic, external. You may assume the port pin is fully pre-configured as an input. [5] 2. Review see textbook figure 8.15. This figure illustrates an electrical structure similar to the lab's Grayhill 96BB2-006-R 4x4 keypad. From the figure, determine if the switches are configured as: (a) positive logic, external (b) negative logic, external [5] 3. Create a flowchart for a program that scans the 4x4 keypad using 4-output and 4-input GPIO pins and identifies which single button has been pressed (assume only one can be pressed at a time). [15]