31. To program 8155, port A and port B as output ports, what will be the control word?

1. 1. 03 H

   
   
   

   2. 01 H

   
   
   

   3. 02 H

   
   
   

   4. F 3 H

   
   
   

---

1. View Hint View Answer Discuss in Forum

   03 H

   Correct Option: A

   03 H

---

32. Which of the following can be used as a multipurpose programmable device?

1. 1. Intel 8155

   
   
   

   2. Intel 8255

   
   
   

   3. Intel 8251

   
   
   

   4. Intel 8237

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Intel 8155

   Correct Option: A

   Intel 8155

---

---

33. How many I/O ports of 8 bit each are present in Intel 8155?
    

1. 1. 1

   
   
   

   2. 3

   
   
   

   3. 2

   
   
   

   4. 4

   
   
   

---

1. View Hint View Answer Discuss in Forum

   3

   Correct Option: B

   3

---

34. Which of the following make 8155 different from 8255?

1. 1. A timer

   
   
   

   2. 3, 8-bit I/O ports

   
   
   

   3. Dynamic RAM

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   A timer

   Correct Option: A

   A timer

---

---

35. The mode 1 of Intel 8255 performs—

1. 1. Simple I/P

   
   
   

   2. Bi-directional Data transfer

   
   
   

   3. Simple I/O

   
   
   

   4. I/O with handshake

   
   
   

---

1. View Hint View Answer Discuss in Forum

   I/O with handshake

   Correct Option: D

   I/O with handshake

---