Question 1

5 Points

Comment on the direction of the port for the following CWR values in 8255

1. 80H
2. 8A H
3. 8B H
4. 92H
5. 98 H

Question 2

5 Points

The 8255 operates in 2 modes,Answer the following wrt 8255 modes

1. Which bit of control word register is responsible for mode selection
2. Role of D5 and D6 of CWR
3. Value of CWR for setting PC3
4. Value o fD3,D2,D1 to select PC4
5. Value o fD3,D2,D1 to select PC2