Multiple Choice
to configure 8255 with port A output,Port B input port C lower output and port C upper input
A) Mov al,0AFH
B) mov al,0AEH
C) mov Al,0CEH
D) Mov A,0AAH
Correct Answer:
Verified
Correct Answer:
Verified
Q14: Asynchronous serial communication involves<br>A)start bit<br>B)stop bits<br>C)character data<br>D)all
Q15: 8255 has three ----parrallel port<br>A)8bit<br>B)16bit<br>C)32bit<br>D)64bit
Q16: Flash ADC consist of….converters<br>A)2^?<br>B)2^? -1<br>C)2^? +1<br>D)none of
Q17: 8253/54 has c----command that allows the user
Q18: In 8255 ,BSR means -----<br>A)bit set/reset<br>B)byteset/reset<br>C)binary set/reset<br>D)none
Q20: for i/o of 8255,if -----, the word
Q21: 8253/54 timers can be programmed in---modes<br>A)1<br>B)3<br>C)6<br>D)5
Q22: walkie-talkie is an example of …..serial communication<br>A)Simplex<br>B)Half
Q23: in mode 0 of 8253/54 ----disables counting<br>A)gate=1<br>B)gate=0<br>C)wr#=1<br>D)wr#=0
Q24: in ----, bidirectional data transfer is possible<br>A)mode