Question 1

8253/54 timers can be programmed in---modes

Accepted Answer

A) 1 
B) 3 
C) 6 
D) 5 
A) 1 
B) 3 
C) 6 
D) 5

Question 2

walkie-talkie is an example of …..serial communication

Accepted Answer

A) Simplex 
B) Half duplex 
C) Full Duplex 
D) none of these 
A) Simplex 
B) Half duplex 
C) Full Duplex 
D) none of these

Question 3

in mode 0 of 8253/54 ----disables counting

Accepted Answer

A) gate=1 
B) gate=0 
C) wr#=1 
D) wr#=0 
A) gate=1 
B) gate=0 
C) wr#=1 
D) wr#=0

Question 4

in ----, bidirectional data transfer is possible

Accepted Answer

A) mode 0 
B) mode1 
C) mode2 
D) BSR 
A) mode 0 
B) mode1 
C) mode2 
D) BSR

Question 5

8255 has ----i/o modes

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 8 
A) 2 
B) 3 
C) 4 
D) 8

8253/54 timers can be programmed in---modes

walkie-talkie is an example of …..serial communication