Question 1

Conversion time Tc of successive approximation ADC is given as

Accepted Answer

A) T(n-1) 
B) T(n+1) 
C) T(n) 
D) T(n+2) 
A) T(n-1) 
B) T(n+1) 
C) T(n) 
D) T(n+2) B

Question 2

For i/o mode of 8255,if -----,the word is taken as a mode definition word

Accepted Answer

A) D7=1 
B) D7=0 
C) D0=1 
D) D0=0 
A) D7=1 
B) D7=0 
C) D0=1 
D) D0=0 A

Question 3

ADC 0809 IS A ----- PIN IC

Accepted Answer

A) 40 
B) 20 
C) 24 
D) 28 
A) 40 
B) 20 
C) 24 
D) 28 D

Question 4

Asynchronous serial communication involves transmission of

Accepted Answer

A) start bit 
B) stop bit 
C) character data 
D) all 
A) start bit 
B) stop bit 
C) character data 
D) all

Question 5

To indicate end of conversion ADC 0808/0809 ACTIVATES -----SIGNAL

Accepted Answer

A) EOC 
B) SOC 
C) CLK 
D) OUTPUT CONTROL 
A) EOC 
B) SOC 
C) CLK 
D) OUTPUT CONTROL

Question 6

In ------ of 8255 ,bidirectionali/o data transfer is possible

Accepted Answer

A) mode0 
B) mode1 
C) mode2 
D) BSR MODE 
A) mode0 
B) mode1 
C) mode2 
D) BSR MODE

Question 7

IBF is an active-------- output signal for 8255

Accepted Answer

A) high 
B) low 
C) enable 
D) disable 
A) high 
B) low 
C) enable 
D) disable

Question 8

Walkie-talkie is an example of serial communication

Accepted Answer

A) simplex 
B) half-duplex 
C) full-duplex 
D) none 
A) simplex 
B) half-duplex 
C) full-duplex 
D) none

Question 9

For i/o mode of 8255 ,if -----, the word is taken as a bit set/reset word

Accepted Answer

A) D7=1 
B) D7=0 
C) D0=1 
D) D0=0 
A) D7=1 
B) D7=0 
C) D0=1 
D) D0=0

Question 10

Whichof the following is the fastest ADC

Accepted Answer

A) DUAL SLOPE 
B) successive approximation 
C) flash 
D) single slope 
A) DUAL SLOPE 
B) successive approximation 
C) flash 
D) single slope

Question 11

Conversion time of ADC 0808 IS

Accepted Answer

A) 100 ms 
B) 100micro sec 
C) 100 Ms 
D) 100ns 
A) 100 ms 
B) 100micro sec 
C) 100 Ms 
D) 100ns

Question 12

8255 sets INTR when STB'=-----,IBF=---------,INTE=--------,for input conrol signals

Accepted Answer

A) 1,0,1 
B) 1,1,0 
C) 1,1,1 
D) 0,1,1 
A) 1,0,1 
B) 1,1,0 
C) 1,1,1 
D) 0,1,1

Conversion time Tc of successive approximation ADC is given as

For i/o mode of 8255,if -----,the word is taken as a mode definition word

ADC 0809 IS A ----- PIN IC

Asynchronous serial communication involves transmission of

To indicate end of conversion ADC 0808/0809 ACTIVATES -----SIGNAL

In ------ of 8255 ,bidirectionali/o data transfer is possible

IBF is an active-------- output signal for 8255

Walkie-talkie is an example of serial communication

For i/o mode of 8255 ,if -----, the word is taken as a bit set/reset word

Whichof the following is the fastest ADC

Conversion time of ADC 0808 IS

8255 sets INTR when STB'=-----,IBF=---------,INTE=--------,for input conrol signals

I/O, Communication, and Timerscounters of 8255 and ADC 0808

Filters

Exam 2: I/O Mode and Communication in 8255 and ADCS

Conversion time Tc of successive approximation ADC is given as

For i/o mode of 8255,if -----,the word is taken as a mode definition word

ADC 0809 IS A ----- PIN IC

Asynchronous serial communication involves transmission of

To indicate end of conversion ADC 0808/0809 ACTIVATES -----SIGNAL

In ------ of 8255 ,bidirectionali/o data transfer is possible

IBF is an active-------- output signal for 8255

Walkie-talkie is an example of serial communication

For i/o mode of 8255 ,if -----, the word is taken as a bit set/reset word

Whichof the following is the fastest ADC

Conversion time of ADC 0808 IS

8255 sets INTR when STB'=-----,IBF=---------,INTE=--------,for input conrol signals

I/O, Communication, and Timerscounters of 8255 and ADC 0808

Filters