Consider the following interfacing system. Port PA1 is an input port connected w

Question

Consider the following interfacing system. Port PA1 is an input port connected with an external switch. PB1 is an output port connected with an external LED. Given the signal of PA1 and PB1, and the behaviors of the switch and the LED shown in Figure 1, the switch interface and the LED interface are respectively. Put the answer in the box. positive logic and negative logic B. positive logic and positive logic negative logic and negative logic negative logic and positive logic Figure 1. PA1, PB1 signals and the corresponding behaviors of the switch and the LED

Explanation / Answer

c) negative logic and negative logic

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