QUESTION

Text
Image


1. Suppose, a peripheral device Keyboard is connected to Port A and a monitor is connected to Port B of the $82 \mathrm{C} 55 \mathrm{PPI}$. a. Write the Control Bits to configure the $82 \mathrm{C} 55 \mathrm{IC}$. b. Draw a diagram showing the configuration of the $82 \mathrm{C} 55 \mathrm{IC}$ (Hint: specify the configuration of Port A, Port B and Port C pins) c. Suppose you pressed the ' $\mathrm{B}$ ' key on the keyboard. Write down the steps that will take place in the $82 \mathrm{C} 55 \mathrm{IC}$. Draw a timing diagram accordingly. d. Now, you want to see the ' $\mathrm{B}$ ' in the monitor, Write down the steps that will take place in the $82 \mathrm{C} 55 \mathrm{IC}$. Draw a timing diagram accordingly.

Public Answer

Ashely007 The First Answerer