Question: Question 4 ( 2 5 marks ) Fig. 2 shows a PIC 1 8 F 4 5 5 0 microcontroller interfacing to a (

Question 4(25 marks)
Fig. 2 shows a PIC18F4550 microcontroller interfacing to a \(4\times 4\) keypad with mechanical switches:
Fig. 2
(a) By analyzing Fig. 2, identify which bits in PORTD are inputs and which bits are outputs.
Question 4 ( 2 5 marks ) Fig. 2 shows a PIC 1 8 F

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